CN104600373A - Preparation method for electrolytic solution of lithium ion battery - Google Patents
Preparation method for electrolytic solution of lithium ion battery Download PDFInfo
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- CN104600373A CN104600373A CN201510086256.3A CN201510086256A CN104600373A CN 104600373 A CN104600373 A CN 104600373A CN 201510086256 A CN201510086256 A CN 201510086256A CN 104600373 A CN104600373 A CN 104600373A
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- ion battery
- lithium ion
- carbonate
- electrolyte
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 35
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- 239000008151 electrolyte solution Substances 0.000 title abstract description 5
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 claims abstract description 21
- -1 imidazole compound Chemical class 0.000 claims abstract description 14
- PYLWMHQQBFSUBP-UHFFFAOYSA-N monofluorobenzene Chemical compound FC1=CC=CC=C1 PYLWMHQQBFSUBP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 7
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 7
- 239000003792 electrolyte Substances 0.000 claims description 38
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 claims description 11
- MCTWTZJPVLRJOU-UHFFFAOYSA-N 1-methyl-1H-imidazole Chemical compound CN1C=CN=C1 MCTWTZJPVLRJOU-UHFFFAOYSA-N 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- 239000005864 Sulphur Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 6
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 5
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 4
- 239000003660 carbonate based solvent Substances 0.000 claims description 4
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 4
- VUPKGFBOKBGHFZ-UHFFFAOYSA-N dipropyl carbonate Chemical compound CCCOC(=O)OCCC VUPKGFBOKBGHFZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims description 3
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 claims description 3
- LXBGSDVWAMZHDD-UHFFFAOYSA-N 2-methyl-1h-imidazole Chemical compound CC1=NC=CN1 LXBGSDVWAMZHDD-UHFFFAOYSA-N 0.000 claims description 2
- 229910015015 LiAsF 6 Inorganic materials 0.000 claims description 2
- 229910013063 LiBF 4 Inorganic materials 0.000 claims description 2
- 229910013870 LiPF 6 Inorganic materials 0.000 claims description 2
- UKNGXMGIMBBLDD-UHFFFAOYSA-N arsoric acid;lithium Chemical compound [Li].O[As](O)(O)=O UKNGXMGIMBBLDD-UHFFFAOYSA-N 0.000 claims description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 claims description 2
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 claims description 2
- 229940125898 compound 5 Drugs 0.000 claims description 2
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 claims description 2
- ANLVEXKNRYNLDH-UHFFFAOYSA-N 1,3-dioxonan-2-one Chemical compound O=C1OCCCCCCO1 ANLVEXKNRYNLDH-UHFFFAOYSA-N 0.000 claims 1
- 229910013684 LiClO 4 Inorganic materials 0.000 claims 1
- 239000002904 solvent Substances 0.000 abstract description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 1
- 125000004122 cyclic group Chemical group 0.000 abstract 1
- 229910052744 lithium Inorganic materials 0.000 description 8
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 6
- 229910001386 lithium phosphate Inorganic materials 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 6
- TWQULNDIKKJZPH-UHFFFAOYSA-K trilithium;phosphate Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O TWQULNDIKKJZPH-UHFFFAOYSA-K 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910019142 PO4 Inorganic materials 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 3
- 239000010452 phosphate Substances 0.000 description 3
- IFDLFCDWOFLKEB-UHFFFAOYSA-N 2-methylbutylbenzene Chemical group CCC(C)CC1=CC=CC=C1 IFDLFCDWOFLKEB-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 150000007942 carboxylates Chemical class 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 239000005486 organic electrolyte Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- 229910002099 LiNi0.5Mn1.5O4 Inorganic materials 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000006230 acetylene black Substances 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002772 conduction electron Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910001486 lithium perchlorate Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0567—Liquid materials characterised by the additives
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a preparation method for an electrolytic solution of a lithium ion battery, and belongs to the technical field of lithium ion batteries. The preparation method comprises the following steps: in parts by weight: uniformly mixing 5-15 parts of lithium salt, 80-100 parts of a carbonate solvent, 5-10 parts of an imidazole compound, 3-6 parts of di-p-methylphenyl disulfide, 3-5 parts of methylene maleimide and 3-6 parts of fluorobenzene. The imidazole compound is added into the electrolytic solution to effectively reduce the loss of the lithium ion battery subjected to multi-time cyclic discharge.
Description
Technical field
The present invention discloses a kind of preparation method of electrolyte of lithium ion battery, belongs to technical field of lithium ion.
Background technology
Lithium ion battery is since nineteen ninety realizes large-scale production, capture rapidly many market segments with the superior electrical property can not compared than other secondary cell (lead-acid battery, Ni-MH battery, nickel-cadmium cell) and the variable advantage of external form, obtain swift and violent development.Be widely used in the field such as mobile phone, notebook computer, PDA, video camera, digital camera, mobile DVD, MP3, electric motor car, electric tool, become the indispensable parts such as various modernization mobile communication equipment, electronic equipment, transit equipment.Lithium-ion battery electrolytes is the required critical material of lithium ion battery, plays the effect of conduction electron in the battery between both positive and negative polarity, is the guarantee that lithium ion battery obtains the advantage such as high voltage, high specific energy.Along with the fast development of lithium ion battery, the electrolyte production needed for China's lithium ion battery is also grown out of nothing, is developed from small to large, serves very important supporting role to the development of lithium ion battery.
In conventional batteries, it is the electrolyte system of solvent that electrolyte all adopts with water.But because the theoretical decomposition voltage of water only has 1.23V, even if consider the overpotential of hydrogen or oxygen, being that the voltage of the battery of the electrolyte system of solvent is the highest with water also only has about 2V (as lead acid accumulator).Lithium battery voltage is up to 3 ~ 4V, and traditional water solution system obviously no longer adapts to the needs of battery, and non-aqueous solution electrolysis liquid system must be adopted as the electrolyte of lithium ion battery.Lithium battery electrolytes mainly adopts can high voltage withstanding and Undec organic solvent and electrolyte.
Electrolyte is generally by highly purified organic solvent, electrolyte lithium salt (lithium hexafluoro phosphate, LiFL
6), the raw material such as necessary additive, under certain condition, formulated by a certain percentage.Organic solvent is the main part of electrolyte, closely related with the performance of electrolyte, general with high dielectric constant solvent and low viscosity solvent used in combination; Common electrolyte lithium salts has lithium perchlorate, lithium hexafluoro phosphate, LiBF4 etc., but considers from the many-side such as cost, fail safe, and lithium hexafluoro phosphate is the main electrolyte that commercial Li-ion battery adopts; The use not yet commercialization of additive, but be one of study hotspot of organic electrolyte always.
CN 101090153A discloses a kind of lithium-ion battery electrolytes, containing electrolytic salt and organic solvent, described organic solvent comprises 25-50 part ethylene carbonate, 30-60 part dimethyl carbonate, 5-25 part methyl ethyl carbonate and 1-15 part Merlon, described in be weight portion.CN 101901939A provides a kind of lithium-ion battery electrolytes, comprises electrolytic salt, mixed solvent and additive; Described mixed solvent comprises ethylene carbonate/diethyl carbonate/methyl ethyl carbonate ternary organic solvent system, carbon number is not more than the linear carboxylate of 5 and account for the vinylene carbonate of electrolyte gross mass 1.5 ~ 2wt%; Described additive is 1,3-propene sultone, and it is 40 ~ 350 that the linear carboxylate that described carbon number is not more than 5 accounts for the ratio that the mass percentage of electrolyte and 1,3-propene sultone account for the mass percentage of electrolyte.This electrolyte solve to improve from electrolyte prescription simultaneously battery high-temperature, cryogenic property more difficult technical problem, make the high temperature of lithium ion battery, low-temperature circulating performance obtain good improvement simultaneously.But the electrolyte of above-mentioned lithium ion battery still also exists the battery problem that capacity loss is larger after circulation electric discharge when applying.
Summary of the invention
The object of the invention is: a kind of nonaqueous electrolytic solution reducing lithium ion battery loss is provided.
Technical scheme:
A kind of preparation method of electrolyte of lithium ion battery, comprise the steps: by weight, lithium salts 5 ~ 15 parts, carbonate-based solvent 80 ~ 100 parts, glyoxaline compound 5 ~ 10 parts, di-p-tolyl two sulphur 3 ~ 6 parts, methylene maleimide 3 ~ 5 parts, fluorobenzene 3 ~ 6 parts are mixed.
Described lithium salts is selected from lithium perchlorate (LiClO
4), hexafluoro closes lithium phosphate (LiPF
6), LiBF4 (LiBF
4), hexafluoro closes arsenic acid lithium (LiAsF
6), Li (CF3CO
2)
2n, LiCF
3sO
3, Li (CF
3sO
2)
3, Li (CF
3sO
2)
2n, Li (C
2f
5sO
2)
2n, LiB (C
2o4)
2in any one or multiple.
Described carbonate-based solvent is selected from a kind of or wherein multiple mixture in ethylene carbonate (EC), propene carbonate (PC), butylene (BC), dimethyl carbonate (DMC), diethyl carbonate (DEC), dipropyl carbonate (DPC), methyl ethyl carbonate (EMC), methyl propyl carbonate (MPC) and carbonic acid first butyl ester (BMC).
Described glyoxaline compound is selected from a kind of or wherein multiple mixture in 1-methylimidazole, 1-tolimidazole, 1,2-methylimidazole.
beneficial effect
The present invention, by adding glyoxaline compound in the electrolytic solution, improves the loss after the repeatedly circulation electric discharge of lithium ion battery effectively.
Embodiment
Embodiment 1
The preparation method of the electrolyte of lithium ion battery, comprises the steps: hexafluoro to close lithium phosphate 5Kg, butylene 80Kg, 1-methylimidazole 5Kg, di-p-tolyl two sulphur 3Kg, methylene maleimide 3Kg, fluorobenzene 3Kg mixes.
Embodiment 2
The preparation method of the electrolyte of lithium ion battery, comprise the steps: hexafluoro to close lithium phosphate 15Kg, butylene 100Kg, 1-methylimidazole 10Kg, di-p-tolyl two sulphur 6Kg, methylene maleimide 5Kg, fluorobenzene 6Kg mix.
Embodiment 3
The preparation method of the electrolyte of lithium ion battery, comprises the steps: hexafluoro to close lithium phosphate 10Kg, butylene 90Kg, 1-methylimidazole 7Kg, di-p-tolyl two sulphur 5Kg, methylene maleimide 4Kg, fluorobenzene 5Kg mixes.
Reference examples 1
Be with the difference of embodiment 3: do not add glyoxaline compound 1-methylimidazole.
The preparation method of the electrolyte of lithium ion battery, comprises the steps: hexafluoro to close lithium phosphate 10Kg, butylene 90Kg, di-p-tolyl two sulphur 5Kg, methylene maleimide 4Kg, fluorobenzene 5Kg mixes.
Reference examples 2
Be with the difference of embodiment 3: do not add fluorobenzene.
The preparation method of the electrolyte of lithium ion battery, comprises the steps: hexafluoro to close lithium phosphate 10Kg, butylene 90Kg, 1-methylimidazole 7Kg, di-p-tolyl two sulphur 5Kg, methylene maleimide 4Kg mixes.
Application test
The preparation of positive plate: by LiNi
0.5mn
1.5o
4mix by the weight ratio of 70:15:15 with acetylene black, PVDF, add solvent, make anode sizing agent, be uniformly coated on aluminium foil, dry also rolling obtains positive plate.The assembling of battery: take lithium metal as negative pole, is assembled into button cell by the positive plate obtained, lithium anode sheet and Celgard2300 type micro-pore septum in argon gas glove box; Inject the electrolyte of each embodiment and reference examples preparation, after sealing, make lithium ion battery.
Electrolyte oxidation decomposition electric potential is tested:
Take platinum electrode as work electrode, lithium electrode, as reference electrode with to electrode, scans the potential curve of each electrolyte, records the oxidation Decomposition current potential of each electrolyte.
Cycle performance is tested:
By each lithium ion battery sample respectively with 35mA.g
-1current density carries out discharge and recharge, and by the charging and discharging curve of each battery sample of indigo plant strange BK6064 type electro-chemical test cabinet record, circulate 40 times, cut-ff voltage is 4.95V, record residual capacity ratio; Residual capacity is than residual capacity/initial capacity × 100% after=the 40 circulation.
Test result is as follows:
| Oxidation Decomposition current potential (V) | Residual capacity ratio (%) | |
| Embodiment 1 | 6.0 | 89 |
| Embodiment 2 | 6.0 | 88 |
| Embodiment 3 | 6.3 | 92 |
| Reference examples 1 | 5.7 | 78 |
| Reference examples 2 | 5.8 | 82 |
As can be seen from the table, after the electrolyte that the present invention prepares is applied to lithium ion battery, there is higher oxidation Decomposition current potential, wherein, embodiment 3, compared with reference examples 1, owing to adding glyoxaline compound, makes the dump energy of battery after circulation electric discharge have also been obtained raising; Embodiment 3, compared with reference examples 2, fluoridizes benzene owing to adding, and oxidation Decomposition current potential is improved.
Claims (4)
1. the preparation method of the electrolyte of a lithium ion battery, it is characterized in that, comprise the steps: by weight, lithium salts 5 ~ 15 parts, carbonate-based solvent 80 ~ 100 parts, glyoxaline compound 5 ~ 10 parts, di-p-tolyl two sulphur 3 ~ 6 parts, methylene maleimide 3 ~ 5 parts, fluorobenzene 3 ~ 6 parts are mixed.
2. the preparation method of the electrolyte of lithium ion battery according to claim 1, is characterized in that: described lithium salts is selected from LiClO
4, LiPF
6, LiBF4 LiBF
4, hexafluoro closes arsenic acid lithium LiAsF
6, Li (CF3CO
2)
2n, LiCF
3sO
3, Li (CF
3sO
2)
3, Li (CF
3sO
2)
2n, Li (C
2f
5sO
2)
2n, LiB (C
2o4)
2in any one or multiple.
3. the preparation method of the electrolyte of lithium ion battery according to claim 1, is characterized in that: described carbonate-based solvent is selected from a kind of or wherein multiple mixture in ethylene carbonate, propene carbonate, butylene, dimethyl carbonate, diethyl carbonate, dipropyl carbonate, methyl ethyl carbonate, methyl propyl carbonate and carbonic acid first butyl ester.
4. the preparation method of the electrolyte of lithium ion battery according to claim 1, is characterized in that: described glyoxaline compound is selected from a kind of or wherein multiple mixture in 1-methylimidazole, 1-tolimidazole, 1,2-methylimidazole.
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| CN201510086256.3A CN104600373A (en) | 2015-02-21 | 2015-02-21 | Preparation method for electrolytic solution of lithium ion battery |
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|---|---|---|---|
| CN201510086256.3A CN104600373A (en) | 2015-02-21 | 2015-02-21 | Preparation method for electrolytic solution of lithium ion battery |
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|---|---|
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Family
ID=53126001
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473719A (en) * | 2018-10-22 | 2019-03-15 | 杉杉新材料（衢州）有限公司 | A kind of lithium-ion battery electrolytes and the lithium ion battery comprising the electrolyte |
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| CN101345325A (en) * | 2008-05-05 | 2009-01-14 | 张家港市国泰华荣化工新材料有限公司 | Lithium ion battery electrolytic solution for promoting graphite cathode film formation and lithium ion battery made by the same |
| US20140349176A1 (en) * | 2013-05-21 | 2014-11-27 | Samsung Sdi Co., Ltd. | Additive for electrolyte, electrolyte and rechargeable lithium battery |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473719A (en) * | 2018-10-22 | 2019-03-15 | 杉杉新材料（衢州）有限公司 | A kind of lithium-ion battery electrolytes and the lithium ion battery comprising the electrolyte |
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