CN103682435B - For the electrolyte of high-rate pulse discharge lithium ion battery - Google Patents
For the electrolyte of high-rate pulse discharge lithium ion battery Download PDFInfo
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- CN103682435B CN103682435B CN201310593537.9A CN201310593537A CN103682435B CN 103682435 B CN103682435 B CN 103682435B CN 201310593537 A CN201310593537 A CN 201310593537A CN 103682435 B CN103682435 B CN 103682435B
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- carbonate
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- 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
-
- 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
- H01M10/0568—Liquid materials characterised by the solutes
-
- 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
- H01M10/0569—Liquid materials characterised by the solvents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
-
- 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
Abstract
The present invention relates to technical field of lithium ion, be specifically related to a kind of electrolyte for high-rate pulse discharge lithium ion battery.The present invention is used for the electrolyte of high-rate pulse discharge lithium ion battery, and comprise electrolytic salt, non-aqueous organic solvent and additive, described electrolytic salt is made up of jointly lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate; Described non-aqueous organic solvent is the mixed solvent of ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate; Described additive is the mixture of vinylene carbonate, ethylene sulfite, chain carboxylate, glycol dimethyl ether.Lithium rechargeable battery prepared by electrolyte provided by the present invention supports 60C, 80C, 100C pulsed discharge, also there is high rate cyclic performance (3C-20C), 500 weeks circulation volume conservation rates about 90%, and the security performance of battery in high-rate pulse discharge and cyclic process that this system makes is fabulous.
Description
Technical field
The present invention relates to technical field of lithium ion, be specifically related to a kind of electrolyte for high-rate pulse discharge lithium ion battery.
Background technology
Lithium ion battery is a kind of rechargeable battery, it mainly rely on lithium ion between a positive electrode and a negative electrode movement carry out work.In charge and discharge process, Li+ comes and goes between two electrodes and embeds and deintercalation: during rechargable battery, and Li+ is from positive pole deintercalation, and embed negative pole through electrolyte, negative pole is in rich lithium state; Then contrary during electric discharge.Lithium ion battery is the representative of modern high performance battery, widely using and wideling popularize along with new forms of energy, the market of lithium ion battery becomes more and more wide, start to replace plumbic acid inside a lot of traditional field, NI-G, Ni-MH battery, electric tool, electric bicycle, the products such as digital 3C electronics start to become more and more higher to the performance requirement of lithium ion battery, following lithium ion battery is expected at batteries for electric tools, automobile and motorcycle initiating power supply are used widely, this direction requires that battery discharge is large circulation (3C-20C), transient high power exports (such as 60C, 80C, 100C pulsed discharge) and low temperature serviceability, high safety performance etc.
Electrolyte is the important component part of lithium ion battery, carries lithium Li
+deintercalation between both positive and negative polarity, thus the mutual conversion realizing electric energy and chemical energy.Electrolyte plays vital effect to the capacity of battery, high rate performance, cycle performance, security performance.
Current most of lithium-ion electrolyte producer is in order to meet the demand of high-rate pulse discharge lithium ion battery, may only simple based on from improve electrolyte conductivity, add the performance direction that film for additive improves SEI film and research and develop, Ye You manufacturer is by by above-mentioned two kinds of direction bindings, but due to from principle, the conductivity improving electrolyte does not associate with the performance improving SEI film, so well can not realize the high-rate pulse discharge performance of lithium ion battery.
Summary of the invention
The technical problem to be solved in the present invention overcomes the deficiencies in the prior art, a kind of lithium-ion battery electrolytes that lithium ion battery carries out high-rate pulse discharge of can supporting is provided, use lithium ion battery prepared by this electrolyte, there is high-rate pulse discharge ability, support 60C, 80C, 100C pulsed discharge, also there is high rate cyclic performance (3C-20C), 500 weeks circulation volume conservation rates about 90%, and the security performance of battery in high-rate pulse discharge and cyclic process that this system makes is fabulous.
The present invention is used for the electrolyte of high-rate pulse discharge lithium ion battery, and comprise electrolytic salt, non-aqueous organic solvent and additive, described electrolytic salt is made up of jointly lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate; Described non-aqueous organic solvent is the mixed solvent of ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate; Described additive is the mixture of vinylene carbonate, ethylene sulfite, chain carboxylate, glycol dimethyl ether.
One of preferably, described electrolytic salt composition mass percentage is respectively: lithium hexafluoro phosphate accounts for 80% ~ 90%, and LiBF4 accounts for 5% ~ 10%, and two dioxalic acid lithium borate accounts for 5% ~ 10%.
Another preferred version: the composition mass percentage of described non-aqueous organic solvent is respectively: ethylene carbonate accounts for 27% ~ 36%, and dimethyl carbonate accounts for 9% ~ 17%, and diethyl carbonate accounts for 8% ~ 16%, and methyl ethyl carbonate accounts for 31% ~ 40%.
Another preferred version: the composition mass percentage of described additive is respectively: vinylene carbonate accounts for 20% ~ 30%, and glycol dimethyl ether accounts for 40% ~ 60%, and ethylene sulfite accounts for 10% ~ 20%, chain carboxylate propyl acetate accounts for 5% ~ 15%.
Another preferred version: be 100% calculating with the oeverall quality of nonaqueous solvents and additive, each component in described high-rate pulse discharge lithium ion battery electrolyte and mass fraction as follows respectively:
Organic solvent: 80% ~ 95%
Additive: 5% ~ 10%.
Another preferred version: electrolytic salt molar concentration is in the electrolytic solution 1.0 ~ 1.3mol/L.
Another preferred version: electrolyte consists of: be 100% calculating with nonaqueous solvents and additive oeverall quality, described for component each in the electrolyte of high-rate pulse discharge lithium ion battery and mass percent as follows:
Ethylene carbonate 30%
Dimethyl carbonate 12%
Diethyl carbonate 14%
Methyl ethyl carbonate 34%
Vinylene carbonate 2.5%
Glycol dimethyl ether 5%
Ethylene sulfite 1.5%
Chain carboxylate propyl acetate 1%;
Electrolytic salt be 88% lithium hexafluoro phosphate, 6% LiBF4,6% pair of dioxalic acid lithium borate jointly form, molar concentration is in the electrolytic solution 1.24mol/L.
The present invention is also provided for the lithium rechargeable battery prepared by the electrolyte of high-rate pulse discharge lithium ion battery, its scheme is: described battery possesses positive pole, negative pole, barrier film, and positive pole, negative pole, barrier film are all immersed in high-rate pulse discharge lithium ion battery electrolyte.
The present invention also provides the application of the lithium rechargeable battery prepared by electrolyte, and its scheme is: the startup power supply described lithium rechargeable battery being applied to electric tool or motor vehicle.
Lithium rechargeable battery prepared by electrolyte provided by the present invention supports 60C, 80C, 100C pulsed discharge, also there is high rate cyclic performance (3C-20C), 500 weeks circulation volume conservation rates about 90%, and the security performance of battery in high-rate pulse discharge and cyclic process that this system makes is fabulous.
Various chemical reaction is there is in the additive each several part of the electrolytic salt in electrolyte system of the present invention, cyclic carbonate and linear carbonates solvent, VC/ES/DME/PA composition inside the lithium ion battery made, finally achieve the ohmage, SEI membrane impedance, electric double layer Charge-transfer resistance, the diffusion impedance that reduce lithium ion battery, the internal resistance of lithium ion battery is made to obtain comprehensive reduction, there is relatively high voltage platform when lithium ion battery carries out large multiplying power pulsed discharge, embodied excellent big current multiplying power discharging property.
Embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited in these embodiments.
All 18650 batteries for the battery tested in following embodiment and comparative example.
18650 described batteries are assembled in the following manner and are obtained:
Positive pole D50 is that nano-scale lithium iron phosphate LFP, CNT, HC2, SUPER_P, PVDF of 500 ~ 800nm forms with certain mass ratio, negative pole graphite (Delanium+MCMB MCMB), SUPER_P, CMC, SBR form with certain mass ratio, after positive and negative electrode is uniformly dispersed by double planetary mixer, then carry out slurry, porous electrode that roll-in, film-making obtain one fixed width and thickness.Then by toasting, reel, enter shell, making that bottom spot welding, laser welding cap, fluid injection, sealing finally complete battery, and adopt formation cabinet to change into, other testing equipments such as high temperature ageing, partial volume carry out electrochemical property test.
Embodiment 1
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30.30%, 12.12%, 14.14%, 34.34%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.52%, 5.05%, 0.51%, 1.01%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 1.94V, 3C-20C 300 weeks capability retentions is 70.3%.
Embodiment 2
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30%, 12%, 14%, 34%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.5%, 5%, 1.5%, 1%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 2.01V, 3C-20C 300 weeks capability retentions is 88.2%.
Embodiment 3
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30%, 12%, 14%, 34%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.5%, 5%, 0.5%, 2%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 1.95V, 3C-20C 300 weeks capability retentions is 76.7%.
Embodiment 4
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 29.70%, 11.88%, 13.86%, 33.66%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.48%, 4.96%, 1.49%, 1.98%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 1.98V, 3C-20C 300 weeks capability retentions is 72.7%.
Embodiment 5
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30.21%, 12.09%, 14.10%, 34.24%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.52%, 5.04%, 0.29%, 1.51%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 1.98V, 3C-20C 300 weeks capability retentions is 73.5%.
Embodiment 6
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 29.79%, 11.92%, 13.90%, 33.76%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.48%, 4.96%, 1.69%, 1.49%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 2.03V, 3C-20C 300 weeks capability retentions is 92%.
Embodiment 7
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30.21%, 12.09%, 14.10%, 34.24%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.52%, 5.04%, 1.01%, 0.80%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 2.04V, 3C-20C 300 weeks capability retentions is 79.2%.
Embodiment 8
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 29.79%, 11.92%, 13.90%, 33.76%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.48%, 4.96%, 0.99%, 2.18%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 2.03V, 3C-20C 300 weeks capability retentions is 86.5%.
Embodiment 9
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30%, 12%, 14%, 34%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.5%, 5%, 1%, 1.5%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 2.03V, 3C-20C 300 weeks capability retentions is 82.4%.
Embodiment 10
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30%, 12%, 14%, 34%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.5%, 5%, 1%, 1.5%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 2.02V, 3C-20C 300 weeks capability retentions is 84%.
Embodiment 11
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 30%, 12%, 14%, 34%; The mass fraction of additive VC, DME, ES, PA is respectively: 2.5%, 5%, 1%, 1.5%; Electrolytic salt is lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate, and mass fraction is respectively: 88%, 6%, 6%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 2.03V, 3C-20C 300 weeks capability retentions is 83.2%.
Comparative example 1
Electrolyte is composed as follows: with organic solvent and additive oeverall quality be 100% calculating, wherein non-aqueous organic solvent: the mass fraction of EC, DMC, DEC, EMC is respectively: 32.4%, 12.9%, 15.3%, 36.8%; Additive VC mass fraction is respectively: 2.5%; Electrolytic salt is lithium hexafluoro phosphate mass fraction 100%, and molar concentration is in the electrolytic solution 1.2mol/L.To add 18650 battery 60C multiplying power pulsed discharge 5s average voltages that this electrolyte makes be the large circulation of 1.75V, 3C-20C 300 weeks capability retentions is 62.4%.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (6)
1. for an electrolyte for high-rate pulse discharge lithium ion battery, comprise electrolytic salt, non-aqueous organic solvent and additive, it is characterized in that, described electrolytic salt is made up of jointly lithium hexafluoro phosphate, LiBF4, two dioxalic acid lithium borate; Described non-aqueous organic solvent is the mixed solvent of ethylene carbonate, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate; Described additive is the mixture of vinylene carbonate, ethylene sulfite, chain carboxylate, glycol dimethyl ether, wherein, described electrolytic salt composition mass percentage is respectively: lithium hexafluoro phosphate accounts for 80% ~ 90%, LiBF4 accounts for 5% ~ 10%, and two dioxalic acid lithium borate accounts for 5% ~ 10%; The composition mass percentage of described non-aqueous organic solvent is respectively: ethylene carbonate accounts for 27% ~ 36%, and dimethyl carbonate accounts for 9% ~ 17%, and diethyl carbonate accounts for 8% ~ 16%, and methyl ethyl carbonate accounts for 31% ~ 40%; The composition mass percentage of described additive is respectively: vinylene carbonate accounts for 20% ~ 30%, and glycol dimethyl ether accounts for 40% ~ 60%, and ethylene sulfite accounts for 10% ~ 20%, and chain carboxylate propyl acetate accounts for 5% ~ 15%.
2. the electrolyte for high-rate pulse discharge lithium ion battery according to claim 1, it is characterized in that, be 100% calculating with the oeverall quality of non-aqueous organic solvent and additive, each component in described high-rate pulse discharge lithium ion battery electrolyte and mass fraction as follows respectively:
Non-aqueous organic solvent: 90% ~ 95%
Additive: 5% ~ 10%.
3. the electrolyte for high-rate pulse discharge lithium ion battery according to claim 1 and 2, is characterized in that, electrolytic salt molar concentration is in the electrolytic solution 1.0 ~ 1.3mol/L.
4. the electrolyte for high-rate pulse discharge lithium ion battery according to claim 1 and 2, it is characterized in that, electrolyte consists of: be 100% calculating with non-aqueous organic solvent and additive oeverall quality, described for component each in the electrolyte of high-rate pulse discharge lithium ion battery and mass percent as follows:
Ethylene carbonate 30%
Dimethyl carbonate 12%
Diethyl carbonate 14%
Methyl ethyl carbonate 34%
Vinylene carbonate 2.5%
Glycol dimethyl ether 5%
Ethylene sulfite 1.5%
Chain carboxylate propyl acetate 1%;
Electrolytic salt be 88% lithium hexafluoro phosphate, 6% LiBF4,6% pair of dioxalic acid lithium borate jointly form, molar concentration is in the electrolytic solution 1.24mol/L.
5. one kind use described in claim 1 ~ 4 for high-rate pulse discharge lithium ion battery electrolyte prepared by lithium rechargeable battery, it is characterized in that, described battery possesses positive pole, negative pole, barrier film, and positive pole, negative pole, barrier film are all immersed in high-rate pulse discharge lithium ion battery electrolyte.
6. use described in claim 1 ~ 4 for high-rate pulse discharge lithium ion battery electrolyte prepared by the application of lithium rechargeable battery, it is characterized in that, described lithium rechargeable battery is applied to the startup power supply of electric tool or motor vehicle.
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| CN106328999A (en) * | 2016-11-29 | 2017-01-11 | 河南省法恩莱特新能源科技有限公司 | High-rate electrolyte of lithium-ion battery |
| CN106785035A (en) * | 2016-12-05 | 2017-05-31 | 钦州市钦南区生产力促进中心 | A kind of lithium-ion battery electrolytes and preparation method thereof |
| CN109638342A (en) * | 2018-12-19 | 2019-04-16 | 珠海光宇电池有限公司 | A kind of lithium ion battery that high temperature performance can combine |
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| CN101394007A (en) * | 2008-11-03 | 2009-03-25 | 广州天赐高新材料股份有限公司 | Electrolysis liquid for lithium manganate battery |
| CN102361097A (en) * | 2011-11-14 | 2012-02-22 | 中国海洋石油总公司 | Preparation method of low-temperature electrolyte for lithium iron phosphate power battery |
| CN102386356A (en) * | 2005-06-23 | 2012-03-21 | 赢创德固赛有限责任公司 | Film former-free electrolyte/separator system and use thereof in electrochemical energy accumulators |
| CN102810691A (en) * | 2011-05-31 | 2012-12-05 | 比亚迪股份有限公司 | Lithium ion battery electrolyte and lithium ion battery |
| CN103296311A (en) * | 2013-04-25 | 2013-09-11 | 合肥工业大学 | High-security phosphate-based electrolyte and lithium ion battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102386356A (en) * | 2005-06-23 | 2012-03-21 | 赢创德固赛有限责任公司 | Film former-free electrolyte/separator system and use thereof in electrochemical energy accumulators |
| CN101394007A (en) * | 2008-11-03 | 2009-03-25 | 广州天赐高新材料股份有限公司 | Electrolysis liquid for lithium manganate battery |
| CN102810691A (en) * | 2011-05-31 | 2012-12-05 | 比亚迪股份有限公司 | Lithium ion battery electrolyte and lithium ion battery |
| CN102361097A (en) * | 2011-11-14 | 2012-02-22 | 中国海洋石油总公司 | Preparation method of low-temperature electrolyte for lithium iron phosphate power battery |
| CN103296311A (en) * | 2013-04-25 | 2013-09-11 | 合肥工业大学 | High-security phosphate-based electrolyte and lithium ion battery |
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