CN116779344B - Capacitor for new energy automobile discharging device - Google Patents
Capacitor for new energy automobile discharging device Download PDFInfo
- Publication number
- CN116779344B CN116779344B CN202310881812.0A CN202310881812A CN116779344B CN 116779344 B CN116779344 B CN 116779344B CN 202310881812 A CN202310881812 A CN 202310881812A CN 116779344 B CN116779344 B CN 116779344B
- Authority
- CN
- China
- Prior art keywords
- electrolyte
- capacitor
- new energy
- energy automobile
- parts
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003990 capacitor Substances 0.000 title claims abstract description 48
- 238000007599 discharging Methods 0.000 title claims abstract description 36
- 239000003792 electrolyte Substances 0.000 claims abstract description 123
- -1 tetramethyl ammonium difluoro oxalate borate Chemical compound 0.000 claims abstract description 29
- 239000002270 dispersing agent Substances 0.000 claims abstract description 17
- 239000003960 organic solvent Substances 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 239000002184 metal Substances 0.000 claims abstract description 12
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 239000008367 deionised water Substances 0.000 claims abstract description 10
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 claims description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 20
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 claims description 18
- 150000003839 salts Chemical class 0.000 claims description 15
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- LOXVSKUQULMRNO-HVDRVSQOSA-N N[C@@H](CCC(N)=O)C(=O)O.C(CCCCCCCCCCC)(=O)N Chemical compound N[C@@H](CCC(N)=O)C(=O)O.C(CCCCCCCCCCC)(=O)N LOXVSKUQULMRNO-HVDRVSQOSA-N 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- TVACALAUIQMRDF-UHFFFAOYSA-N dodecyl dihydrogen phosphate Chemical compound CCCCCCCCCCCCOP(O)(O)=O TVACALAUIQMRDF-UHFFFAOYSA-N 0.000 claims description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- IIZPXYDJLKNOIY-JXPKJXOSSA-N 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphocholine Chemical group CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCC\C=C/C\C=C/C\C=C/C\C=C/CCCCC IIZPXYDJLKNOIY-JXPKJXOSSA-N 0.000 claims description 6
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- 229910019142 PO4 Inorganic materials 0.000 claims description 6
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 6
- 239000000787 lecithin Substances 0.000 claims description 6
- 229940067606 lecithin Drugs 0.000 claims description 6
- 235000010445 lecithin Nutrition 0.000 claims description 6
- 239000010452 phosphate Substances 0.000 claims description 6
- YGSDEFSMJLZEOE-UHFFFAOYSA-N salicylic acid Chemical compound OC(=O)C1=CC=CC=C1O YGSDEFSMJLZEOE-UHFFFAOYSA-N 0.000 claims description 6
- 239000000600 sorbitol Substances 0.000 claims description 6
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 4
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 4
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 4
- BZZRUHJGDOBTJL-UHFFFAOYSA-N 11-methyldodecan-1-ol;phosphoric acid Chemical compound OP(O)(O)=O.CC(C)CCCCCCCCCCO BZZRUHJGDOBTJL-UHFFFAOYSA-N 0.000 claims description 3
- 239000005711 Benzoic acid Substances 0.000 claims description 3
- 235000010233 benzoic acid Nutrition 0.000 claims description 3
- MCVFFRWZNYZUIJ-UHFFFAOYSA-M lithium;trifluoromethanesulfonate Chemical compound [Li+].[O-]S(=O)(=O)C(F)(F)F MCVFFRWZNYZUIJ-UHFFFAOYSA-M 0.000 claims description 3
- FJKROLUGYXJWQN-UHFFFAOYSA-N papa-hydroxy-benzoic acid Natural products OC(=O)C1=CC=C(O)C=C1 FJKROLUGYXJWQN-UHFFFAOYSA-N 0.000 claims description 3
- 229960004889 salicylic acid Drugs 0.000 claims description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims description 2
- KXKVLQRXCPHEJC-UHFFFAOYSA-N acetic acid trimethyl ester Natural products COC(C)=O KXKVLQRXCPHEJC-UHFFFAOYSA-N 0.000 claims description 2
- KVNRLNFWIYMESJ-UHFFFAOYSA-N butyronitrile Chemical compound CCCC#N KVNRLNFWIYMESJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000002134 carbon nanofiber Substances 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229910021389 graphene Inorganic materials 0.000 claims description 2
- QSZMZKBZAYQGRS-UHFFFAOYSA-N lithium;bis(trifluoromethylsulfonyl)azanide Chemical compound [Li+].FC(F)(F)S(=O)(=O)[N-]S(=O)(=O)C(F)(F)F QSZMZKBZAYQGRS-UHFFFAOYSA-N 0.000 claims description 2
- FVSKHRXBFJPNKK-UHFFFAOYSA-N propionitrile Chemical compound CCC#N FVSKHRXBFJPNKK-UHFFFAOYSA-N 0.000 claims description 2
- HXJUTPCZVOIRIF-UHFFFAOYSA-N sulfolane Chemical compound O=S1(=O)CCCC1 HXJUTPCZVOIRIF-UHFFFAOYSA-N 0.000 claims description 2
- ISIJQEHRDSCQIU-UHFFFAOYSA-N tert-butyl 2,7-diazaspiro[4.5]decane-7-carboxylate Chemical compound C1N(C(=O)OC(C)(C)C)CCCC11CNCC1 ISIJQEHRDSCQIU-UHFFFAOYSA-N 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 2
- SCWWKKUJPHRBRV-JEDNCBNOSA-N (2s)-2,6-diaminohexanoic acid;sodium Chemical compound [Na].NCCCC[C@H](N)C(O)=O SCWWKKUJPHRBRV-JEDNCBNOSA-N 0.000 claims 1
- 238000001179 sorption measurement Methods 0.000 description 25
- 230000000052 comparative effect Effects 0.000 description 21
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 12
- 229910052708 sodium Inorganic materials 0.000 description 12
- 239000011734 sodium Substances 0.000 description 12
- 239000000243 solution Substances 0.000 description 12
- 238000013508 migration Methods 0.000 description 10
- 230000005012 migration Effects 0.000 description 10
- 239000012046 mixed solvent Substances 0.000 description 9
- ASBWGYODEQCTNZ-UHFFFAOYSA-N 11-methyldodecyl dihydrogen phosphate Chemical compound CC(C)CCCCCCCCCCOP(O)(O)=O ASBWGYODEQCTNZ-UHFFFAOYSA-N 0.000 description 7
- KDXKERNSBIXSRK-UHFFFAOYSA-N Lysine Natural products NCCCCC(N)C(O)=O KDXKERNSBIXSRK-UHFFFAOYSA-N 0.000 description 7
- 239000004472 Lysine Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 7
- 150000002500 ions Chemical class 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical group CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 6
- 150000001450 anions Chemical class 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000007772 electrode material Substances 0.000 description 5
- 238000009792 diffusion process Methods 0.000 description 4
- KDXKERNSBIXSRK-YFKPBYRVSA-N L-lysine Chemical compound NCCCC[C@H](N)C(O)=O KDXKERNSBIXSRK-YFKPBYRVSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 3
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 3
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000007858 starting material Substances 0.000 description 3
- MWQJGSUQGMJVCS-UHFFFAOYSA-N N=[S+]C(F)(F)F.[Li] Chemical compound N=[S+]C(F)(F)F.[Li] MWQJGSUQGMJVCS-UHFFFAOYSA-N 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- MPDCKIORILZMHV-UHFFFAOYSA-N boric acid;lithium;oxalic acid Chemical compound [Li].OB(O)O.OC(=O)C(O)=O MPDCKIORILZMHV-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 238000013329 compounding Methods 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- JLPULHDHAOZNQI-ZTIMHPMXSA-N 1-hexadecanoyl-2-(9Z,12Z-octadecadienoyl)-sn-glycero-3-phosphocholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCC\C=C/C\C=C/CCCCC JLPULHDHAOZNQI-ZTIMHPMXSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 125000003368 amide group Chemical group 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000000482 effect on migration Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000003949 imides Chemical class 0.000 description 1
- 238000009830 intercalation Methods 0.000 description 1
- 230000002687 intercalation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 229940068918 polyethylene glycol 400 Drugs 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000005588 protonation Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229940083466 soybean lecithin Drugs 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/60—Liquid electrolytes characterised by the solvent
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/62—Liquid electrolytes characterised by the solute, e.g. salts, anions or cations therein
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
- H01G11/54—Electrolytes
- H01G11/58—Liquid electrolytes
- H01G11/64—Liquid electrolytes characterised by additives
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Electric Double-Layer Capacitors Or The Like (AREA)
Abstract
The application relates to the technical field of new energy automobiles, and particularly discloses a capacitor for a new energy automobile discharging device. The capacitor for the new energy automobile discharging device comprises a metal shell and a capacitor main body packaged in the metal shell, wherein the capacitor main body comprises an anode, a cathode, a diaphragm and electrolyte, wherein the diaphragm is arranged between the anode and the cathode; the electrolyte is mainly prepared from the following raw materials in parts by weight: 50-70 parts of organic solvent, 8-10 parts of deionized water, 5-15 parts of first electrolyte, 10-20 parts of second electrolyte, 0.5-1 part of stabilizer and 0.3-0.5 part of dispersing agent; the first electrolyte is one of tetramethyl ammonium difluoro oxalate borate, triethyl methyl ammonium tetrafluoroborate and 1-ethyl-3 methyl imidazole tetrafluoroborate. The capacitor for the new energy automobile discharging device has the advantage of high energy density.
Description
Technical Field
The application relates to the technical field of new energy automobiles, in particular to a capacitor for a new energy automobile discharging device.
Background
Along with the continuous popularization of low-carbon environment-friendly technology, new energy automobiles gradually become the first choice of people's travel tools. The new energy automobile adopts unconventional automobile fuel as power source, integrates advanced technology in the aspects of power control and driving of the automobile, and has new technology and new structure. The new energy automobile comprises a hybrid electric automobile, a pure electric automobile, a fuel cell electric automobile, other new energy automobiles and the like, wherein the pure electric automobile is the most widely applied.
In addition to management of battery modules, power output management systems are also very important for new energy vehicles. The core unit of the power output management system is a discharging device, and the discharging device mainly comprises a starting unit, a DC/AC inversion unit, a protection unit, a control unit and a discharging management unit, wherein an important component used in the discharging management unit and the protection unit is a capacitor, and the capacitor can assist in managing the power output of the power supply.
The working environment of the capacitor in the discharge device has the characteristics of high charge and discharge speed, large ripple wave, temperature fluctuation and the like, so that higher requirements are put forward on the performance of the capacitor, and the super capacitor has more excellent performance and rapid development and is widely applied as a core component of the discharge device. At present, active carbon is mainly adopted as an electrode material of the super capacitor, electrolyte comprises a water system and an organic system, the working voltage of the water system electrolyte is low, and the use limit is large. Tetrafluoroboric acids are mainly used as the organic electrolyte, but the conductivity of such an electrolyte is insufficient and the energy density of the capacitor is low. Therefore, how to improve the performance of the electrolyte of the super capacitor is a problem to be solved urgently.
Disclosure of Invention
In order to solve the problems of poor conductivity and low energy density of electrolyte, the application provides a capacitor for a new energy automobile discharging device.
The application provides a capacitor for a new energy automobile discharging device, which adopts the following technical scheme:
the capacitor for the new energy automobile discharging device comprises a metal shell and a capacitor main body packaged in the metal shell, wherein the capacitor main body comprises an anode, a cathode, a diaphragm and electrolyte, wherein the diaphragm is arranged between the anode and the cathode;
The electrolyte is mainly prepared from the following raw materials in parts by weight: 50-70 parts of organic solvent, 8-10 parts of deionized water, 5-15 parts of first electrolyte, 10-20 parts of second electrolyte, 0.5-1 part of stabilizer and 0.3-0.5 part of dispersing agent; the first electrolyte is one of tetramethyl ammonium difluoro oxalate borate, triethyl methyl ammonium tetrafluoroborate and 1-ethyl-3 methyl imidazole tetrafluoroborate; the second electrolyte consists of organic salt, sodium 2- (lauramide glutamine) lysine and fatty alcohol ester in the mass ratio of (12-15) (5-7) (2.5-3.2).
By adopting the technical scheme, the micro-water mixed solvent system is formed by compounding the organic solvent and the deionized water, the first electrolyte and the second electrolyte are uniformly dispersed in the mixed solvent system, the first electrolyte has anions with larger molecular size, and the charge distribution is dispersed, so that the effect between anions and cations can be reduced, and the electrochemical performance of the electrolyte is improved. The organic salt in the second electrolyte is dispersed in a mixed solvent system in a highly delocalized way, so that the conductivity is better, and meanwhile, the viscosity and the internal resistance of the electrolyte are reduced due to the adoption of the mixed solvent system, and the higher power density is obtained.
And the sodium 2- (lauramide glutamine) lysine and the fatty alcohol ester in the second electrolyte can form an adsorption layer with semi-ordered dynamic molecular arrangement at the solid-liquid interface of the electrode and the electrolyte, and the adsorption layer can improve the migration and transmission state and diffusion coefficient of anions and electrons of the first electrolyte in the semi-ordered dynamic conversion process, thereby being beneficial to charge and discharge under the condition of high multiplying power and large current. In addition, under the drive of the polarization of the adsorption layer, the surface charge density of the electrode material is higher, so that a larger potential difference is generated, the charge and discharge time is shortened, and the energy density of the capacitor is further improved.
Preferably, the organic salt is at least one of lithium bis (trifluoromethylsulfonyl) imide, lithium bis (oxalato) borate and lithium trifluoromethylsulfonate.
By adopting the technical scheme, the types and the compositions of the organic salt are optimized and regulated, so that the dissociation and ion migration states of the organic salt in a mixed solvent system are better, the charge dispersion degree is high, the organic salt is easier to dissolve, the compatibility with an adsorption layer is better, and the overall electrochemical performance of the electrolyte is improved.
Preferably, the organic salt consists of lithium bis (trifluoromethyl) sulfonyl imide and lithium bis (oxalato) borate according to the molar ratio of (2.6-3.5) (1-1.2).
Through adopting above-mentioned technical scheme, two trifluoromethyl sulfimide lithium are more easily dissociated, and the molecular activity is higher, and the migration behavior state in the adsorbed layer is better, but the stability is relatively poor, and the steric hindrance of two oxalic acid boric acid lithium molecules is great, can produce the stagnancy in the transmission process in the adsorbed layer and drag to a certain extent, and this kind of stagnancy drags the energy density that the effect can help promoting the low pressure district, consequently further experiments and screens the mole ratio of two trifluoromethyl sulfimide lithium and two oxalic acid boric acid lithium for electrolyte all has better energy density under different environment.
Preferably, the mass ratio of the first electrolyte to the second electrolyte is (0.7-1.5): 1.
By adopting the technical scheme, the mass ratio of the first electrolyte to the second electrolyte is optimized and adjusted, so that on one hand, the viscosity of the electrolyte can be reduced on the premise of ensuring the conductivity, and on the other hand, the thickness of the adsorption layer and the energy density of the electrolyte can be balanced.
Preferably, the fatty alcohol ester is at least one of isotridecyl alcohol phosphate, lauryl phosphate and sorbitol fatty acid ester.
By adopting the technical scheme, the types of fatty alcohol esters are optimized and regulated, the molecular arrangement state of the adsorption layer is improved, heat generated in the charging and discharging process of the capacitor electrolyte can be absorbed or released, the ordered and semi-ordered duty ratio of the adsorption layer is changed in the temperature change process, and better conductivity and energy density are obtained.
Preferably, the fatty alcohol ester is prepared from sorbitol phosphate and lauryl phosphate according to a molar ratio of (2-3): 1.
By adopting the technical scheme, the composition ratio of the fatty alcohol ester is tested and screened, the molecular arrangement of the adsorption layer is further optimized, and the migration and transmission states and diffusion coefficients of ions and electrons in the electrolyte are further improved.
Preferably, the organic solvent is at least one of sulfolane, ethylene carbonate, dimethyl sulfoxide, acetonitrile, propionitrile, butyronitrile, gamma-butyrolactone, ethyl acetate, methyl acetate, dimethyl carbonate and diethyl carbonate.
By adopting the technical scheme, the types of the organic solvents are optimized and regulated, a very good solvent environment is provided for the first electrolyte and the second electrolyte, the binding capacity to anions is weakened, the migration speed and the conveying speed of ions and electrons are improved by the cooperative adsorption layer, and the conductivity performance and the capacity density of the electrolyte are improved.
Preferably, the stabilizer is at least one of salicylic acid, phosphorous acid, citric acid and benzoic acid.
By adopting the technical scheme, the stabilizer is introduced into the mixed solvent system, the ionic conductivity of the electrolyte can be improved by the active hydroxyl in the stabilizer molecules, the electrochemical performance of the electrolyte is obviously improved, the protonation capability of the mixed solvent system can be assisted to be improved, and the comprehensive performance of the capacitor is enhanced.
Preferably, the dispersing agent is lecithin.
By adopting the technical scheme, after the lecithin dispersing agent is introduced into the mixed solvent system, the interface state of the adsorption layer and the adjacent electrolyte can be improved, and the stability of the structure of the adsorption layer can be improved.
Preferably, the positive electrode material and the negative electrode material are at least one of activated carbon, graphene, carbon nanofiber and mesoporous carbon.
In summary, the application has the following beneficial effects:
1. The application adopts a mixed solvent system composed of a small amount of water and an organic solvent, and forms an adsorption layer at the solid-liquid interface of the electrode material and the electrolyte through the compound use of the first electrolyte and the second electrolyte, thereby improving the migration and transmission state and diffusion coefficient of anions and electrons in the electrolyte, improving the electrochemical performance of the electrolyte and improving the conductivity and energy density.
2. The application optimizes and screens the types of organic salt and fatty alcohol ester, and improves the overall performance of the electrolyte.
3. The raw capacitor can be used for a discharging device of a new energy automobile, has higher energy density, and can complete the charging and discharging process in a shorter time.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials of the examples and comparative examples of the present application are commercially available in general except for the specific descriptions.
Examples
Example 1
The capacitor for the new energy automobile discharging device comprises a metal shell and a capacitor main body encapsulated in the metal shell, wherein the capacitor main body comprises an anode, a cathode, a diaphragm and electrolyte, wherein the diaphragm and the electrolyte are arranged between the anode and the cathode, and the anode and the cathode are made of mesoporous carbon materials.
The electrolyte of the embodiment is prepared from the following raw materials in parts by weight: 50g of organic solvent, 10g of deionized water, 5g of first electrolyte, 20g of second electrolyte, 0.5g of stabilizer and 0.5g of dispersing agent.
Wherein the organic solvent is acetonitrile. The first electrolyte is triethylmethyl ammonium tetrafluoroborate. The second electrolyte consists of lithium bisoxalato borate, sodium 2- (lauramide glutamine) lysine and isotridecyl alcohol phosphate according to a mass ratio of 12:7:2.5. The stabilizer is salicylic acid. The dispersing agent is diethyl ether.
The preparation method of the electrolyte of the embodiment comprises the following steps:
S1: uniformly mixing the organic solvent and the first electrolyte in the formula amount to prepare a pre-solution;
S2: and uniformly mixing deionized water and the second electrolyte to obtain an intermediate solution, slowly adding the precursor solution into the intermediate solution, mixing for 1.5 hours at a stirring speed of 500rpm, adding a stabilizer and a dispersing agent, and continuously stirring for 0.5 hour to obtain the electrolyte.
Example 2
The capacitor for the new energy automobile discharging device comprises a metal shell and a capacitor main body encapsulated in the metal shell, wherein the capacitor main body comprises an anode, a cathode, a diaphragm and electrolyte, wherein the diaphragm and the electrolyte are arranged between the anode and the cathode, and the anode and the cathode are made of mesoporous carbon materials.
The electrolyte of the embodiment is prepared from the following raw materials in parts by weight: 70g of organic solvent, 8g of deionized water, 15g of first electrolyte, 10g of second electrolyte, 1g of stabilizer and 0.3g of dispersing agent.
Wherein the organic solvent is ethylene carbonate. The first electrolyte is tetramethyl ammonium difluoro oxalate borate. The second electrolyte consists of lithium bisoxalato borate, sodium 2- (lauramide glutamine) lysine and isotridecyl alcohol phosphate according to a mass ratio of 12:7:2.5. The stabilizer is benzoic acid. The dispersing agent is diethyl ether.
The preparation method of the electrolyte of the embodiment comprises the following steps:
S1: uniformly mixing the organic solvent and the first electrolyte in the formula amount to prepare a pre-solution;
s2: and uniformly mixing deionized water and the second electrolyte to obtain an intermediate solution, slowly adding the precursor solution into the intermediate solution, mixing for 1h at a stirring speed of 800rpm, and then adding a stabilizer and a dispersing agent and continuously stirring for 15min to obtain the high-strength electrolyte.
Example 3
The capacitor for the new energy automobile discharging device comprises a metal shell and a capacitor main body encapsulated in the metal shell, wherein the capacitor main body comprises an anode, a cathode, a diaphragm and electrolyte, wherein the diaphragm and the electrolyte are arranged between the anode and the cathode, and the anode and the cathode are made of mesoporous carbon materials.
The electrolyte of the embodiment is prepared from the following raw materials in parts by weight: 60g of organic solvent, 8.5g of deionized water, 12g of first electrolyte, 16.5g of second electrolyte, 0.8g of stabilizer and 0.35g of dispersing agent.
Wherein the organic solvent is ethylene carbonate. The first electrolyte is 1-ethyl-3-methylimidazolium tetrafluoroborate. The second electrolyte consists of lithium bisoxalato borate, sodium 2- (lauramide glutamine) lysine and isotridecyl alcohol phosphate according to a mass ratio of 12:7:2.5. The stabilizer is citric acid. The dispersing agent is polyethylene glycol 400.
The preparation method of the electrolyte of the embodiment comprises the following steps:
S1: uniformly mixing the organic solvent and the first electrolyte in the formula amount to prepare a pre-solution;
S2: and uniformly mixing deionized water and the second electrolyte to obtain an intermediate solution, slowly adding the precursor solution into the intermediate solution, mixing for 1.2 hours at a stirring speed of 650rpm, adding a stabilizer and a dispersing agent, and continuously stirring for 20 minutes to obtain the electrolyte.
Example 4
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 3 in that: the second electrolyte consists of lithium bisoxalato borate, sodium 2- (lauramidoglutamine) lysine and isotridecyl alcohol phosphate according to the mass ratio of 15:5:3.2, and the rest is the same as in example 3.
The method for preparing the electrolyte of this example was the same as in example 3.
Example 5
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 3 in that: the second electrolyte consists of lithium bisoxalato borate, sodium 2- (lauramidoglutamine) lysine and isotridecyl alcohol phosphate according to the mass ratio of 14:6.5:2.8, and the rest is the same as in example 3.
The method for preparing the electrolyte of this example was the same as in example 3.
Example 6
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 5 in that: the electrolyte was prepared from lithium bistrifluoromethylsulfonylimide and lithium trifluoromethylsulfonate in a molar ratio of 2:1, and the rest was the same as in example 5.
Example 7
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 5 in that: the electrolyte is prepared from the raw materials of organic salt, namely lithium bis (trifluoromethyl) sulfonyl imide and lithium bis (oxalato) borate according to a molar ratio of 2.6:1.2, and the rest is the same as in the example 5.
Example 8
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 5 in that: the electrolyte was prepared from the following raw materials, namely, an organic salt consisting of lithium bistrifluoromethylsulfonyl imide and lithium bisoxalato borate in a molar ratio of 3.5:1, and the rest was the same as in example 5.
Example 9
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 8 in that: the starting materials of the electrolyte were the same as in example 8 except that the molar ratio of fatty alcohol ester to isotridecyl phosphate to lauryl phosphate was 2:1.
Example 10
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 8 in that: the starting materials of the electrolyte were sorbitol phosphate and lauryl phosphate in a molar ratio of 2:1, and the remainder was the same as in example 8.
Example 11
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 8 in that: the starting materials of the electrolyte were sorbitol phosphate and lauryl phosphate in a molar ratio of 3:1, and the remainder was the same as in example 8.
Example 12
The capacitance for the new energy automobile discharging device of the present embodiment is different from that of embodiment 10 in that: the raw material of the electrolyte was soybean lecithin as the dispersing agent, and the rest was the same as in example 10.
Comparative example
Comparative example 1
The capacitance for the new energy automobile discharging device of this comparative example is different from that of example 1 in that: the second electrolyte was lithium bisoxalato borate, and the rest of the electrolyte was the same as in example 1.
Comparative example 2
The capacitance for the new energy automobile discharging device of this comparative example is different from that of example 1 in that: the electrolyte solution is prepared from the raw materials of a second electrolyte consisting of lithium bisoxalato borate and sodium 2- (lauramide glutamine) lysine according to a mass ratio of 12:7, and the rest is the same as in example 1.
Comparative example 3
The capacitance for the new energy automobile discharging device of this comparative example is different from that of example 1 in that: the second electrolyte is composed of lithium bisoxalato borate and isotridecyl alcohol phosphate according to the mass ratio of 12:2.5 in the raw materials of the electrolyte, and the rest is the same as in the example 1.
Comparative example 4
The capacitance for the new energy automobile discharging device of this comparative example is different from that of example 1 in that: the electrolyte solution was prepared from sodium 2- (lauramide-glutamine) lysine and fatty alcohol ester in a mass ratio of 7:2.5, and the rest was the same as in example 1.
Comparative example 5
The capacitance for the new energy automobile discharging device of this comparative example is different from that of example 1 in that: the second electrolyte is composed of lithium bisoxalato borate and polyvinylpyrrolidone according to a mass ratio of 12:5, and the rest is the same as in example 1.
Performance test
Detection method
The electrical conductivity and energy density of the electrolytes for the new energy automobile discharge devices of examples 1 to 12 and comparative examples 1 to 5 were measured, and the measurement results are shown in table 1.
TABLE 1 capacitive Performance test data for New energy automobile discharge devices for examples 1-12 and comparative examples 1-5
As can be seen from analysis of examples 1 to 3 and comparative example 1 in combination with table 1, the use of the first electrolyte in combination with the second electrolyte, the sodium 2- (laurylglutamine) lysine and the fatty alcohol phosphate, which are components of the second electrolyte, can form an adsorption layer at the solid-liquid interface of the electrode material, greatly improve the transmission speed and migration efficiency of ions and electrons in the electrolyte, and improve the conductivity and energy density, and it can be seen that the conductivity of example 3 is improved by about 1.4 times and the energy density is improved by about 43.2% compared with comparative example 1.
In addition, as can be seen from analysis of example 1 and comparative examples 2 to 5, comparative example 2 is only compounded with lithium bisoxalato borate and sodium 2- (lauramidoglutamine) lysine, and comparative example 3 is only compounded with lithium bisoxalato borate and isotridecyl phosphate, and both conductivity and energy density are reduced, because the formed adsorption layer has incomplete molecular arrangement and cannot form a semi-ordered structure, and the polarization effect is weaker, so that the ion transmission rate in the electrolyte is slower. In contrast, in comparative example 4, the second electrolyte consisted of sodium 2- (lauramidoglutamine) lysine and fatty alcohol ester, and no organic salt was added, and although an adsorption layer could be formed, the migration promoting effect on anions and cations in the first electrolyte was poor, and the overall electrochemical performance was poor. When lithium bisoxalato borate and polyvinylpyrrolidone are adopted for compounding and using in comparative example 5, although polyvinylpyrrolidone molecules contain polar carbonyl and amide groups, adsorption can be formed on the surface of an electrode material, and the promotion effect on migration and transmission of ions in an electrolyte is inferior to that of the second electrolyte.
As can be seen from analysis of examples 4-5, examples 6-8 and examples 9-11 in combination with table 1, further experiments and adjustment of the composition ratio of the second electrolyte, the organic salt and the fatty alcohol phosphate improve the molecular arrangement state of the adsorption layer, promote the polarization effect of the adsorption layer, promote the ionic electron migration velocity at the interface of the adsorption layer, improve the conductivity of the electrolyte and the energy density of the capacitor, and promote the comprehensive electrochemical performance of the capacitor.
As can be seen from analysis example 12 in combination with table 1, lecithin was used as a dispersant, and the lecithin was able to undergo intercalation and benign competitive adsorption at the interface between the adsorption layer and the electrolyte, maintaining the "membrane flexibility" at the interface of the adsorption layer, reducing the rate of diffusion of molecules into the electrolyte in the adsorption layer, and being beneficial to maintaining the stability of the adsorption layer. In addition, lecithin molecules can form ordered assemblies at the interface of the adsorption layer, the ordered assemblies can generate phase behaviors under the temperature change of the electrolyte in the charging and discharging process of the capacitor, the migration speed of ions in the electrolyte is improved, and the conductivity of the electrolyte and the energy density of the capacitor are further enhanced.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (8)
1. The capacitor for the new energy automobile discharging device is characterized by comprising a metal shell and a capacitor main body packaged in the metal shell, wherein the capacitor main body comprises an anode, a cathode, a diaphragm and electrolyte, wherein the diaphragm and the electrolyte are arranged between the anode and the cathode; the electrolyte mainly comprises the following raw materials in parts by weight: 50-70 parts of organic solvent, 8-10 parts of deionized water, 5-15 parts of first electrolyte, 10-20 parts of second electrolyte, 0.5-1 part of stabilizer and 0.3-0.5 part of dispersing agent; the first electrolyte is one of tetramethyl ammonium difluoro oxalate borate, triethyl methyl ammonium tetrafluoroborate and 1-ethyl-3 methyl imidazole tetrafluoroborate; the second electrolyte consists of (12-15) of organic salt, (5-7) of (2.5-3.2) of sodium lysine 2- (lauramide glutamine) and fatty alcohol ester according to the mass ratio, wherein the organic salt is at least one of lithium bis (trifluoromethylsulfonyl) imide, lithium bis (oxalato) borate and lithium trifluoromethylsulfonate, and the fatty alcohol ester is at least one of isotridecyl phosphate, lauryl phosphate and sorbitol fatty acid ester.
2. The capacitor for the new energy automobile discharging device according to claim 1, wherein the organic salt consists of lithium bis (trifluoromethyl) sulfonyl imide and lithium bis (oxalato) borate according to the molar ratio of (2.6-3.5) (1-1.2).
3. The capacitor for a new energy automobile discharge device according to claim 1, wherein the mass ratio of the first electrolyte to the second electrolyte is (0.7-1.5): 1.
4. The capacitor for a new energy automobile discharge device according to claim 1, wherein the fatty alcohol ester is composed of sorbitol phosphate and lauryl phosphate in a molar ratio of (2-3): 1.
5. The capacitor for a new energy automobile discharge device according to claim 1, wherein the organic solvent is at least one of sulfolane, ethylene carbonate, dimethyl sulfoxide, acetonitrile, propionitrile, butyronitrile, γ -butyrolactone, ethyl acetate, methyl acetate, dimethyl carbonate, diethyl carbonate.
6. The capacitor for a new energy automobile discharge device according to claim 1, wherein the stabilizer is at least one of salicylic acid, phosphorous acid, citric acid, and benzoic acid.
7. The capacitor for a new energy automobile discharge device of claim 1 wherein said dispersant is lecithin.
8. The capacitor for a new energy automobile discharge device according to claim 1, wherein the material used for the positive electrode and the material used for the negative electrode are at least one of activated carbon, graphene, carbon nanofibers, and mesoporous carbon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310881812.0A CN116779344B (en) | 2023-07-18 | 2023-07-18 | Capacitor for new energy automobile discharging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310881812.0A CN116779344B (en) | 2023-07-18 | 2023-07-18 | Capacitor for new energy automobile discharging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116779344A CN116779344A (en) | 2023-09-19 |
| CN116779344B true CN116779344B (en) | 2024-06-18 |
Family
ID=87987947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310881812.0A Active CN116779344B (en) | 2023-07-18 | 2023-07-18 | Capacitor for new energy automobile discharging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116779344B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113270632A (en) * | 2021-05-13 | 2021-08-17 | 东莞市杉杉电池材料有限公司 | High-nickel ternary lithium ion battery electrolyte and lithium ion battery containing same |
| CN113809397A (en) * | 2021-08-05 | 2021-12-17 | 蜂巢能源科技有限公司 | Electrolyte, lithium ion battery and application of electrolyte additive |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100473433B1 (en) * | 2000-07-17 | 2005-03-08 | 마쯔시다덴기산교 가부시키가이샤 | Non-aqueous electrolyte and non-aqueous electrolytic cell and electrolytic condenser comprising the same |
| JP3979104B2 (en) * | 2002-02-05 | 2007-09-19 | 松下電器産業株式会社 | Electrolytic solution for electrolytic capacitor driving and electrolytic capacitor using the same |
| KR101497330B1 (en) * | 2013-06-03 | 2015-03-02 | 주식회사 엘지화학 | Electrode Assembly for Sulfur-Lithium Ion Battery and Sulfur-Lithium Ion Battery Comprising The Same |
| CN107204485B (en) * | 2017-03-31 | 2019-11-19 | 宁波中车新能源科技有限公司 | A kind of polynary electrolyte of battery capacitor low temperature |
| US20230124791A1 (en) * | 2021-10-18 | 2023-04-20 | Uop Llc | Polyelectrolyte multilayer membrane for redox flow battery applications |
-
2023
- 2023-07-18 CN CN202310881812.0A patent/CN116779344B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113270632A (en) * | 2021-05-13 | 2021-08-17 | 东莞市杉杉电池材料有限公司 | High-nickel ternary lithium ion battery electrolyte and lithium ion battery containing same |
| CN113809397A (en) * | 2021-08-05 | 2021-12-17 | 蜂巢能源科技有限公司 | Electrolyte, lithium ion battery and application of electrolyte additive |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116779344A (en) | 2023-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108598488B (en) | High-energy-density lithium ion battery and electrolyte thereof | |
| US8168333B2 (en) | Plastic crystal electrolyte for lithium batteries | |
| US5754393A (en) | Electric double layer capacitor | |
| JP6019534B2 (en) | ELECTROLYTE SOLUTION FOR LITHIUM SECONDARY BATTERY, LITHIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING LITHIUM SECONDARY BATTERY | |
| CN113629365B (en) | Electrolyte injection method and lithium ion battery | |
| CN112786968B (en) | Phosphate-based high-voltage flame-retardant electrolyte | |
| CN109065950A (en) | Surfactant-based low-temperature lithium ion battery electrolyte and lithium ion battery | |
| CN109638350A (en) | The stable succinonitrile base solid electrolyte of a kind of pair of lithium, preparation method and applications | |
| US20160314909A1 (en) | Lithium ion capacitor | |
| WO2021111847A1 (en) | Non-aqueous electrolyte, semi-solid electrolyte layer, sheet for secondary battery, and secondary battery | |
| CN105552426A (en) | Lithium-ion battery with overcharge protection function | |
| CN107204485A (en) | A kind of battery capacitor polynary electrolyte of low temperature | |
| CN116779344B (en) | Capacitor for new energy automobile discharging device | |
| US20130130126A1 (en) | Electrochemical cell for high-voltage operation and electrode coatings for use in the same | |
| JP2019133895A (en) | Additive for electrolyte | |
| JP4858107B2 (en) | Electrolyte | |
| CN112490500A (en) | Electrolyte for electricity storage device, and method for manufacturing electricity storage device | |
| CN108122686B (en) | The Li of fluoride cladding4Ti5O12/ carbon nanotube composite negative pole material and its preparation and application | |
| CN110459805A (en) | A kind of nickelic tertiary cathode electrolyte thereof | |
| JP6278758B2 (en) | Non-aqueous electrolyte and power storage device including the same | |
| EP3703090A1 (en) | Aqueous electrolyte and pseudocapacitor comprising same | |
| JP2004247176A (en) | Electrolytic solution with aluminum passive state film forming ability and lithium secondary battery | |
| JP2019204725A (en) | Lithium secondary battery | |
| CN118547351B (en) | A three-dimensional lithium-free negative electrode current collector, preparation method thereof and lithium metal battery | |
| CN114335728B (en) | Electrolyte for high-voltage lithium cobalt oxide battery and lithium cobalt oxide battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |