CN104934635A - Non-aqueous electrolyte capable of improving charge and discharge performance of water-based anode lithium ion battery - Google Patents
Non-aqueous electrolyte capable of improving charge and discharge performance of water-based anode lithium ion battery Download PDFInfo
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- CN104934635A CN104934635A CN201410119174.XA CN201410119174A CN104934635A CN 104934635 A CN104934635 A CN 104934635A CN 201410119174 A CN201410119174 A CN 201410119174A CN 104934635 A CN104934635 A CN 104934635A
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- lithium ion
- ion battery
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 229910001416 lithium ion Inorganic materials 0.000 title abstract description 21
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title abstract description 20
- 239000011255 nonaqueous electrolyte Substances 0.000 title abstract 2
- 239000003792 electrolyte Substances 0.000 claims abstract description 36
- 239000000654 additive Substances 0.000 claims abstract description 18
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000000996 additive effect Effects 0.000 claims abstract description 12
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 11
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 10
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims abstract description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000010290 biphenyl Nutrition 0.000 claims abstract description 7
- 239000004305 biphenyl Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims abstract description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims abstract description 6
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000011356 non-aqueous organic solvent Substances 0.000 claims abstract description 5
- GWAOOGWHPITOEY-UHFFFAOYSA-N 1,5,2,4-dioxadithiane 2,2,4,4-tetraoxide Chemical compound O=S1(=O)CS(=O)(=O)OCO1 GWAOOGWHPITOEY-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910013188 LiBOB Inorganic materials 0.000 claims abstract description 4
- 239000007774 positive electrode material Substances 0.000 claims abstract description 4
- 229910013870 LiPF 6 Inorganic materials 0.000 claims description 9
- 239000013538 functional additive Substances 0.000 claims description 6
- -1 methyl ethyl carbonate alkene ester Chemical class 0.000 claims description 5
- 229910013063 LiBF 4 Inorganic materials 0.000 claims description 3
- 229910013872 LiPF Inorganic materials 0.000 claims description 3
- 101150058243 Lipf gene Proteins 0.000 claims description 3
- VEWLDLAARDMXSB-UHFFFAOYSA-N ethenyl sulfate;hydron Chemical compound OS(=O)(=O)OC=C VEWLDLAARDMXSB-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 239000008151 electrolyte solution Substances 0.000 claims description 2
- 229910052748 manganese Inorganic materials 0.000 claims description 2
- 239000011572 manganese Substances 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims 4
- 229910017052 cobalt Inorganic materials 0.000 claims 2
- 239000010941 cobalt Substances 0.000 claims 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 2
- 229910052759 nickel Inorganic materials 0.000 claims 2
- 229910002097 Lithium manganese(III,IV) oxide Inorganic materials 0.000 claims 1
- 230000006399 behavior Effects 0.000 claims 1
- 239000011258 core-shell material Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- QHGJSLXSVXVKHZ-UHFFFAOYSA-N dilithium;dioxido(dioxo)manganese Chemical compound [Li+].[Li+].[O-][Mn]([O-])(=O)=O QHGJSLXSVXVKHZ-UHFFFAOYSA-N 0.000 abstract description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 3
- 239000010439 graphite Substances 0.000 abstract description 3
- 239000003960 organic solvent Substances 0.000 abstract description 2
- ZPFAVCIQZKRBGF-UHFFFAOYSA-N 1,3,2-dioxathiolane 2,2-dioxide Chemical compound O=S1(=O)OCCO1 ZPFAVCIQZKRBGF-UHFFFAOYSA-N 0.000 abstract 1
- 229910013884 LiPF3 Inorganic materials 0.000 abstract 1
- 229910001290 LiPF6 Inorganic materials 0.000 abstract 1
- ZGDWHDKHJKZZIQ-UHFFFAOYSA-N cobalt nickel Chemical compound [Co].[Ni].[Ni].[Ni] ZGDWHDKHJKZZIQ-UHFFFAOYSA-N 0.000 abstract 1
- 150000002148 esters Chemical class 0.000 abstract 1
- 229940031098 ethanolamine Drugs 0.000 abstract 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- 238000007599 discharging Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- SIXOAUAWLZKQKX-UHFFFAOYSA-N carbonic acid;prop-1-ene Chemical compound CC=C.OC(O)=O SIXOAUAWLZKQKX-UHFFFAOYSA-N 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 239000011230 binding agent Substances 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 239000006258 conductive agent Substances 0.000 description 3
- 239000012046 mixed solvent Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 229920003048 styrene butadiene rubber Polymers 0.000 description 3
- QLAJNZSPVITUCQ-UHFFFAOYSA-N 1,3,2-dioxathietane 2,2-dioxide Chemical compound O=S1(=O)OCO1 QLAJNZSPVITUCQ-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000002174 Styrene-butadiene Substances 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 239000005486 organic electrolyte Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 239000007784 solid electrolyte Substances 0.000 description 2
- 229910052596 spinel Inorganic materials 0.000 description 2
- 239000011029 spinel Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 1
- 229910012851 LiCoO 2 Inorganic materials 0.000 description 1
- 229910014689 LiMnO Inorganic materials 0.000 description 1
- 229910013290 LiNiO 2 Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical class [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002033 PVDF binder Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000009831 deintercalation Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003273 ketjen black Substances 0.000 description 1
- OVAQODDUFGFVPR-UHFFFAOYSA-N lithium cobalt(2+) dioxido(dioxo)manganese Chemical compound [Li+].[Mn](=O)(=O)([O-])[O-].[Co+2] OVAQODDUFGFVPR-UHFFFAOYSA-N 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- 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
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- Secondary Cells (AREA)
Abstract
The invention provides a non-aqueous electrolyte capable of improving the high-rate circulation and low-temperature discharge behavior of a water-based anode lithium ion battery. The electrolyte consists of a lithium salt, an organic solvent and a special function additive. The lithium salt is one or the composition of LiPF6, LiBF4, LiBOB and LiPF3(C2F5)3. The non-aqueous organic solvent comprises ethylene carbonate, dimethyl carbonate, ethyl methyl carbonate, biphenyl and vinylene carbonate, the function additive is the combination of more than three of ethylene sulfate, methylene methanedisulfonate, maleic anhydride and ethanol amine, and the addition quantity of the function additive is 0.1% to 6%. The electrolyte provided by the invention is applied to manufacturing of a water-based graphite anode cylindrical 18650 lithium ion battery by using cobalt-nickel-containing lithium manganate as a positive active material. The additive such as sulfurated ester is added into the electrolyte, so that the charge-discharge cycle and large-current low-temperature discharge characteristic of the lithium ion battery can be greatly improved.
Description
[technical field]
The non-water organic electrolyte that the present invention relates to a kind of obvious the high power charging-discharging circulation and low temperature performance that improve cylinder 18650 type water system negative electrode lithium ion electrokinetic cell also mates the additive having specific function, belongs to field of material technology.This power brick is containing positive plate, negative plate, barrier film, electrolyte and battery case, positive plate applies anode sizing agent by aluminium foil and forms, negative plate applies water system cathode size by Copper Foil and forms, barrier film is have the polypropylene of micropore or polyethylene or three-layer polypropylene/polyethylene/polypropylene laminated film, and battery case is made up of Stainless Steel Shell and block.Battery appearance is cylinder, body diameter 18mm, high 65mm, and battery pole group is winding-type electrode assemblie.
[background technology]
Along with the development of Study on Li-ion batteries and development technique, people more and more pay attention to the pollution focused on cell production process and itself can not have environment while reducing costs, and have the feature of green product.Nickle cobalt lithium manganate tertiary cathode material combines LiCoO
2, LiNiO
2and LiMnO
2the advantages such as specific energy and specific power performance, Stability Analysis of Structures.Become current raising performance of lithium ion battery and one of important research direction reduced costs.Spinel lithium manganate has three-dimensional tunnel structure, and lithium ion deintercalation is convenient, and promoter manganese is abundant, cheap, environmentally friendly, fail safe is high, is also suitable as anode material for lithium-ion batteries.But spinel lithium manganate battery is in use, especially under the high temperature conditions capacity attenuation and impedance increase particularly serious.Make solvent by CMC, SBR is that the water system method of binding agent is prepared graphite cathode and is applied in lithium-ion-power cell aspect more and more widely, and it not only reduces electrode material cost, and production process is very little to the pollution of environment.But prepare negative pole with NMP+PVDF oil system, method to compare, respective battery is very different in high current charge-discharge circulation and low temperature performance, the particularly electric tool charge-discharge performance of column type 18650 lithium-ion-power cell, because the internal resistance of cell is usually higher, heavy-current discharge feature is remarkable, and discharge voltage is on the low side and high-multiplying power discharge circulation is not so good as oil system negative battery.For this reason, select to have in a wider temperature range excellent lithium ion conductive and physical and chemical stability non-water organic electrolyte composition and can be compatible with electrode well, effectively can improve the charge-discharge performance of water system negative electrode lithium ion electrokinetic cell.
Lithium-ion battery electrolytes is made up of lithium salts, non-aqueous organic solvent and a small amount of functional additive usually.Lithium salts generally mainly contains LiPF
6, LiBF
4, LiBOB, LiPF
3(C
2f
5)
3etc., organic solvent is EC, PC, DMC, DEC, EMC etc., additive types is various, the battery of different purposes and electrode system, the additive used is also different, find one have more stable physicochemical properties Arrays Aluminum Films in Acid Solution and composition and can with both positive and negative polarity matched compatible, effectively will improve the high power charging-discharging behavior of lithium-ion-power cell.Therefore, exploitation water system negative electrode lithium ion battery electrolyte also mates specific functional additive, is all that tool is of great significance for flash-over characteristic and the charge and discharge cycles behavior improving electrokinetic cell.
[summary of the invention]
Technical problem to be solved by this invention is, a kind of high power charging-discharging that significantly can improve water system negative electrode lithium ion electrokinetic cell is provided to circulate and the electrolyte with good low temperature discharge behavior forms and mates the additive with stabilization function, adding due to stabilization additives in this electrolyte, further improve battery electrode surface SEI (solid electrolyte interface) perforated membrane stability, reduce the generation of electrode surface side reaction, stablize the increase of whole cell resistance.
The present invention is achieved through the following technical solutions:
Design a kind of remarkable electrolyte system improving lithium ion battery discharge and recharge behavior and also mate the additive with specific function, this electrolyte is made up of three constituents: lithium salts, non-aqueous organic solvent and typical additives, functional additive.
Described lithium salts molecular formula is one or more mixtures in following compound: LiPF
6, LiBOB, LiBF
4, LiPF
3(C
2f
5)
3.Solvent composition mainly comprises, PC, EC, EMC, DMC and typical additives VC, BP etc.
Described functional additive is selected from sulfuric acid vinyl ester, maleic anhydride, and more than three kinds combinations in methane-disulfonic acid methylene ester, monoethanolamine, the addition of this additive is 0.1% ~ 7% of electrolyte total weight.Described electrolyte is applied to and manufactures with NMC ternary active material for positive electrode, the lithium ion battery of modified graphite cathode prepared by water system method.Lithium-ion-power cell provided by the invention comprises positive plate, barrier film, electrolyte and battery case, and in negative plate slurry except graphous graphite powder 90%-96%, binding agent 1%-4%, what also comprise 1%-6% meets conductive agent.
Described combined conductive agent is more than one in SuperP, electrically conductive graphite, Ketjen black, and binding agent is styrene butadiene rubber sbr.
Column type 18650-1500mAh electric tool lithium ion power cell cathode manufacture method provided by the invention, comprises the following steps:
(1) Delanium and combined conductive agent are placed in the CMC aqueous solution containing binding agent SBR (1.5%-4.5%), by stirring and evenly mixing formation cathode size;
(2) cathode size is coated on 10 μm of thick metal copper foils, dries at the temperature of 70 DEG C-100 DEG C;
(3) by the negative pole roll-in of oven dry, itemize, the negative plate of the band lug of specific dimensions is made;
The lithium-ion-power cell of manufacture of the present invention has the lower internal resistance of cell, and discharge capacity is not less than 1500mAh, and can realize more than 20A heavy-current discharge, discharging efficiency is high, and cycle performance is superior.Low temperature-20 DEG C of 15A (10C) electric discharge is significantly improved.
The invention has the beneficial effects as follows: in the lithium-ion battery electrolytes selected, add special function additive, effectively can improve lithium ion battery negative surface SEI (solid electrolyte interface) perforated membrane physical and chemical stability matter, reduce electrode surface negative reaction to occur, thus suppression battery impedance rises, the battery performance caused accelerates decay.Improve high power charging-discharging circulation and the cryogenic discharging characteristic of battery.
[accompanying drawing explanation]
Fig. 1 is under normal temperature and low temperature, the 15A discharge curve of embodiment 1,2 and comparative example 1 battery, voltage range: 4.2V-2.0V.
Fig. 2 is the 20A charge and discharge cycles of embodiment 1,2 and comparative example 1 battery under normal temperature, charging current 1.5A, charging/discharging voltage scope: 4.2V-2.0V.
[embodiment]
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail; these specific embodiments are the preferred embodiments of the present invention; can not limit claim of the present invention; the present invention still has other concrete execution mode multiple; all employings are equal to replacement or equivalent transformation and all technical schemes of being formed, all belong within the scope of protection of present invention.
Comparative example 1:
By lithium salts LiPF
6be dissolved in ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate, in the mixed solvent of propene carbonate, wherein ethylene carbonate: dimethyl carbonate: methyl ethyl carbonate: the mass ratio of propene carbonate is 2: 3.5: 1: 0.5, LiPF
6concentration be 1mol/L.Then in this solution, vinylene carbonate (VC) is added by electrolyte total weight 1%, 1% biphenyl (BP), i.e. obtained contrast electrolyte.Content required by claims of the present invention, the electric tool lithium-ion-power cell selected is cylinder 18650 type 1500mAh.Positive active material is NMC ternary material.Negative electrode active material is modified graphite, and adopts water system method to obtain.
Embodiment 1:
By LiPF
6lithium salts is dissolved in ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate, in the mixed solvent of propene carbonate.Identical with electrolyte solvent composition and ratio in comparative example 1, wherein ethylene carbonate: dimethyl carbonate: methyl ethyl carbonate: the mass ratio of propene carbonate is 2: 3.5: 1: 0.5, LiPF
6concentration be 1mol/L.Typical additives VC is identical with comparative example with BP consumption.Then in this solution, add maleic anhydride by electrolyte total weight 1.0%, add monoethanolamine by 1% of electrolyte total weight, add methane two sulfuric acid methylene ester by 1% of electrolyte total weight, be i.e. obtained required electrolyte.This electrolyte is applied in the battery of same design in comparative example 1.
Embodiment 2:
Identical with electrolyte bulk solvent in comparative example 1, by lithium salts LiPF
6be dissolved in the mixed solvent of ethylene carbonate, dimethyl carbonate, methyl ethyl carbonate, propene carbonate, wherein ethylene carbonate: dimethyl carbonate: methyl ethyl carbonate: the mass ratio of diethyl carbonate is 2: 3.5: 1: 0.5, LiPF
6concentration be 1.0mol/L.Then in this solution, add sulfuric acid vinyl ester by electrolyte total weight 1.0%, 0.5% adds maleic anhydride, and 1.5% adds methane two sulfuric acid methylene ester, i.e. obtained required electrolyte.This electrolyte is applied in the battery of same design in comparative example 1.
According to Fig. 1 15A discharge voltage time curve figure under normal temperature 23 DEG C and-20 DEG C of environmental conditions, can find out, the battery made of electrolyte of the present invention can carry out 15A (10C) electric discharge under-20 DEG C of low temperature.And comparative example 1 electrolyte battery can not discharge.In addition, the discharge voltage that under electrolyte battery normal temperature of the present invention, tool is higher, shows less internal resistance of cell feature.
According to 20A high current charge-discharge cycle characteristics under Fig. 2 normal temperature, after 250 charge and discharge cycles, the remaining battery discharge capacity made of electrolyte of the present invention is still more than 80%, and the battery that comparative example 1 electrolyte makes, socking out capacity only has about 50%, shows discharge capacity attenuate action faster.Therefore, electrolyte of the present invention significantly improves the high current charge-discharge cycle specificity of water system negative electrode lithium ion electrokinetic cell.
Claims (6)
1. one kind obviously can be improved the nonaqueous electrolytic solution of 18650 type lithium-ion-power cell discharge and recharge behaviors of water system negative pole, it is characterized in that this electrolyte is made up of three constituents: lithium salts, non-aqueous organic solvent and typical additives, functional additive, this electrolyte is applied to and manufactures with the modified graphite cathode lithium-ion-power cell prepared under nickel and cobalt containing LiMn2O4 ternary (NMC) positive electrode active materials and water system condition.
2. according to claim 1, it is characterized in that described lithium salts is one or more compositions had in the compound of following molecular formula: LiPF
6, LiBF
4, LiBOB, LiPF
3(C
2f
5)
3.
3. according to claim 1, it is characterized in that described non-aqueous organic solvent and typical additives, comprise ethylene carbonate (EC), dimethyl carbonate (DMC), methyl ethyl carbonate alkene ester (EMC), biphenyl (BP) and vinylene carbonate (VC).
4. according to claim 1, it is characterized in that described functional additive is selected from any more than three kinds combinations in sulfuric acid vinyl ester (DTD), maleic anhydride (MAH), methane-disulfonic acid methylene ester (MMDS) and monoethanolamine.
5. according to claim 4, it is characterized in that the addition of described additive is 0.1% ~ 6.0% of electrolyte total weight.
6. apply lithium-ion-power cell prepared by this electrolyte according to claim 1, it is characterized in that this battery is column type 18650-1.5Ah (also comprising 1.3Ah-2.0Ah) electric tool electrokinetic cell, negative pole preparation method is CMC+SBR water system, negative active core-shell material is modified graphite, and positive electrode active materials is NMC ternary material (nickel: cobalt: manganese=3: 3: 3 or 5: 3: 2).
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|---|---|---|---|
| CN201410119174.XA CN104934635A (en) | 2014-03-21 | 2014-03-21 | Non-aqueous electrolyte capable of improving charge and discharge performance of water-based anode lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410119174.XA CN104934635A (en) | 2014-03-21 | 2014-03-21 | Non-aqueous electrolyte capable of improving charge and discharge performance of water-based anode lithium ion battery |
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|---|---|
| CN104934635A true CN104934635A (en) | 2015-09-23 |
Family
ID=54121694
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|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109417198A (en) * | 2016-06-02 | 2019-03-01 | 野猫技术开发公司 | High voltage electrolytes additive |
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| CN102754268A (en) * | 2010-02-12 | 2012-10-24 | 三菱化学株式会社 | Nonaqueous electrolyte solution, and nonaqueous electrolyte secondary battery |
| CN103109411A (en) * | 2010-09-22 | 2013-05-15 | 富士胶片株式会社 | Nonaqueous electrolyte for secondary battery and lithium secondary battery |
-
2014
- 2014-03-21 CN CN201410119174.XA patent/CN104934635A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771167A (en) * | 2010-02-05 | 2010-07-07 | 九江天赐高新材料有限公司 | High-capacity lithium-ion electrolyte, battery and preparation method of battery |
| CN102754268A (en) * | 2010-02-12 | 2012-10-24 | 三菱化学株式会社 | Nonaqueous electrolyte solution, and nonaqueous electrolyte secondary battery |
| CN103109411A (en) * | 2010-09-22 | 2013-05-15 | 富士胶片株式会社 | Nonaqueous electrolyte for secondary battery and lithium secondary battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109417198A (en) * | 2016-06-02 | 2019-03-01 | 野猫技术开发公司 | High voltage electrolytes additive |
| CN109417198B (en) * | 2016-06-02 | 2022-04-29 | 野猫技术开发公司 | High voltage electrolyte additive |
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Application publication date: 20150923 |