CN111613835A - Electrolyte of lithium ion battery - Google Patents
Electrolyte of lithium ion battery Download PDFInfo
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- CN111613835A CN111613835A CN202010395703.4A CN202010395703A CN111613835A CN 111613835 A CN111613835 A CN 111613835A CN 202010395703 A CN202010395703 A CN 202010395703A CN 111613835 A CN111613835 A CN 111613835A
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- Prior art keywords
- electrolyte
- lithium ion
- carbonate
- ion battery
- additive
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 41
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 25
- 239000000654 additive Substances 0.000 claims abstract description 26
- 150000001335 aliphatic alkanes Chemical class 0.000 claims abstract description 23
- 230000000996 additive effect Effects 0.000 claims abstract description 20
- 239000003960 organic solvent Substances 0.000 claims abstract description 19
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 15
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 13
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 13
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 claims description 12
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims description 11
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 9
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 claims description 7
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims description 7
- 229910052731 fluorine Inorganic materials 0.000 claims description 7
- -1 lithium hexafluorophosphate Chemical compound 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims description 5
- SJHAYVFVKRXMKG-UHFFFAOYSA-N 4-methyl-1,3,2-dioxathiolane 2-oxide Chemical compound CC1COS(=O)O1 SJHAYVFVKRXMKG-UHFFFAOYSA-N 0.000 claims description 4
- ZZXUZKXVROWEIF-UHFFFAOYSA-N 1,2-butylene carbonate Chemical compound CCC1COC(=O)O1 ZZXUZKXVROWEIF-UHFFFAOYSA-N 0.000 claims description 3
- MLHOXUWWKVQEJB-UHFFFAOYSA-N Propyleneglycol diacetate Chemical compound CC(=O)OC(C)COC(C)=O MLHOXUWWKVQEJB-UHFFFAOYSA-N 0.000 claims description 3
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims description 3
- KKQAVHGECIBFRQ-UHFFFAOYSA-N methyl propyl carbonate Chemical compound CCCOC(=O)OC KKQAVHGECIBFRQ-UHFFFAOYSA-N 0.000 claims description 3
- OADJRHDTYUXHAR-UHFFFAOYSA-N 1,3-dioxolan-2-one;ethyl methyl carbonate Chemical compound O=C1OCCO1.CCOC(=O)OC OADJRHDTYUXHAR-UHFFFAOYSA-N 0.000 claims description 2
- 239000006259 organic additive Substances 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract description 6
- 150000002825 nitriles Chemical class 0.000 abstract description 4
- 239000002904 solvent Substances 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 238000009830 intercalation Methods 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 238000007086 side reaction Methods 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 4
- 229910001290 LiPF6 Inorganic materials 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 150000001721 carbon Chemical group 0.000 description 2
- 239000012046 mixed solvent Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- NONFLFDSOSZQHR-UHFFFAOYSA-N 3-(trimethylsilyl)propionic acid Chemical compound C[Si](C)(C)CCC(O)=O NONFLFDSOSZQHR-UHFFFAOYSA-N 0.000 description 1
- VTHRQKSLPFJQHN-UHFFFAOYSA-N 3-[2-(2-cyanoethoxy)ethoxy]propanenitrile Chemical compound N#CCCOCCOCCC#N VTHRQKSLPFJQHN-UHFFFAOYSA-N 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910010941 LiFSI Inorganic materials 0.000 description 1
- 229910013872 LiPF Inorganic materials 0.000 description 1
- 101150058243 Lipf gene Proteins 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 206010016766 flatulence Diseases 0.000 description 1
- 229910003473 lithium bis(trifluoromethanesulfonyl)imide Inorganic materials 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- VDVLPSWVDYJFRW-UHFFFAOYSA-N lithium;bis(fluorosulfonyl)azanide Chemical compound [Li+].FS(=O)(=O)[N-]S(F)(=O)=O VDVLPSWVDYJFRW-UHFFFAOYSA-N 0.000 description 1
- 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 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- ZRZFJYHYRSRUQV-UHFFFAOYSA-N phosphoric acid trimethylsilane Chemical compound C[SiH](C)C.C[SiH](C)C.C[SiH](C)C.OP(O)(O)=O ZRZFJYHYRSRUQV-UHFFFAOYSA-N 0.000 description 1
- IAHFWCOBPZCAEA-UHFFFAOYSA-N succinonitrile Chemical compound N#CCCC#N IAHFWCOBPZCAEA-UHFFFAOYSA-N 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
- H01M10/056—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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
-
- 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
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)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses an electrolyte of a lithium ion battery for improving the safety performance of the battery, which comprises the following components: the lithium ion battery comprises an organic solvent, lithium salt dissolved in the organic solvent and an additive, wherein the additive is as follows: a dithiocyanoalkane corresponding to the formula: CNR1SSR2CN, R1 and R2 are alkanes with carbon number between 0 and 4, or hydrogen atoms on the alkanes are replaced by fluorine atoms, and the number of the substituted fluorine atoms is within 1 to 5. In the actual experimental process, the added dithiocyano alkane additive serving as a sulfur-containing substance can form a surface protective film on the surfaces of the anode and the cathode of the lithium ion battery, so that the co-intercalation of a solvent is prevented and the occurrence of side reactions is reduced under the conditions of battery formation, circulation and the like. Meanwhile, the nitrile substances can inhibit the gas generation of the battery under the high-voltage condition, and the nitrile substances can be used as the additive of the lithium ion battery electrolyte, so that the gas expansion condition of the battery under the high voltage can be effectively solved.
Description
The technical field is as follows:
the invention relates to the technical field of electrolyte of lithium ion batteries, in particular to electrolyte of a lithium ion battery for improving the safety performance of the battery.
Background art:
in order to increase energy density, lithium ion batteries are required to have an increased charging voltage. However, in the process of voltage increase, materials such as the positive electrode, the negative electrode, the electrolyte and the like are abused, and continuous improvement and improvement on the technology are required. For the electrolyte, special additives are needed to protect the anode and the cathode, so that the cycle performance of the battery is not affected under the condition of voltage increase.
Common additives such as succinonitrile SN, tris (trimethylsilane) phosphate TMSP, 1, 3-propylene sultone PST, 1, 2-bis (2-cyanoethoxy) ethane DENE and the like are taken as film forming additives, and common lithium salt additives such as LiFSI, LiODFB, LiTFSI and the like are taken as lithium salt additives. However, although the additive has a certain film forming effect in the use of the electrolyte, the additive still cannot solve the problems of gas generation, internal resistance, gas expansion and compatibility with a negative electrode in a battery cycle process under the condition of high voltage (not less than 4.30V), or the problems of compatibility of a positive electrode and the electrolyte, such as gas expansion, capacity exertion failure, fast cycle attenuation and the like, of the situation that the content of nickel in the positive electrode is increased.
In order to overcome the problems, the inventor provides the following technical scheme through continuous tests, so that the lithium ion battery electrolyte can effectively inhibit the problem of battery gas expansion under the condition of high voltage of the battery.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provide the lithium ion battery electrolyte.
In order to solve the technical problems, the invention adopts the following technical scheme: an electrolyte for a lithium ion battery, comprising: the lithium ion battery comprises an organic solvent, lithium salt dissolved in the organic solvent and an additive, wherein the additive is as follows: a dithiocyanoalkane corresponding to the formula: CNR1SSR2CN, having the corresponding molecular structural formula:
r1 is alkane with carbon number between 0 and 4, or hydrogen atom on the alkane is replaced by fluorine atom, and the number of the substituted fluorine atoms is within 1 to 5; r2 is alkane with carbon number between 0 and 4, or hydrogen atom on the alkane is replaced by fluorine atom, and the number of the substituted fluorine atoms is within 1 to 5.
Further, in the above technical scheme, the additive dithiocyano alkane is in the electrolyte in the following weight percentages: 0.2 to 5 percent.
Further, in the above technical solution, any one or a combination of the following materials is further added to the electrolyte: vinylene carbonate and propylene sulfite.
Further, in the above technical solution, the organic solvent is: any one or combination of two or more of ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propylene carbonate, methyl propyl carbonate, butylene carbonate, ethyl acetate, propylene acetate and the like.
Further, in the above technical solution, the weight ratio of the materials in the organic solvent is: ethylene carbonate methyl ethyl carbonate: diethyl carbonate 25:25: 50.
Further, in the above technical solution, the lithium salt is: and the concentration of the lithium hexafluorophosphate in the electrolyte is 0.8-1.5 mo 1/L.
The invention mainly adds new additives into the electrolyte: a dithiocyano alkane. In the actual experimental process, the added dithiocyano alkane additive serving as a sulfur-containing substance can form a surface protective film on the surfaces of the anode and the cathode of the lithium ion battery, so that the co-intercalation of a solvent is prevented and the occurrence of side reactions is reduced under the conditions of battery formation, circulation and the like. Meanwhile, the nitrile substances can inhibit the gas generation of the battery under the high-voltage condition, and the nitrile substances can be used as the additive of the lithium ion battery electrolyte, so that the gas expansion condition of the battery under the high voltage can be effectively solved.
The specific implementation mode is as follows:
the electrolyte of the lithium ion battery comprises: organic solvent, lithium salt dissolved in organic solvent, additive, and other supplementary additive.
In the present invention, the organic solvent may be selected from conventional organic solvents, including: any one or combination of two or more of ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propylene carbonate, methyl propyl carbonate, butylene carbonate, ethyl acetate, propylene acetate and the like. The embodiment of the invention is preferably as follows: ethylene Carbonate (EC), methylethyl carbonate (EMC), diethyl carbonate (DEC). The weight ratio of the materials in the organic solvent is as follows: ethylene carbonate, methylethyl carbonate, diethyl carbonate 25:25: 50.
The lithium salt is: lithium hexafluorophosphate, lithium tetrafluoroborate, lithium bis (oxalato) borate, and the like. Preferably, the concentration of the lithium hexafluorophosphate in the electrolyte is 0.8-1.5 mo 1/L.
The additive is as follows: the additive is as follows: a dithiocyanoalkane corresponding to the formula: CNR1SSR2CN, having the corresponding molecular structural formula:
wherein R1 is alkane with carbon atom number between 0 and 4, or hydrogen atom on the alkane is replaced by fluorine atom, and the number of the substituted fluorine atoms is within 1 to 5; r2 is alkane with carbon number between 0 and 4, or hydrogen atom on the alkane is replaced by fluorine atom, and the number of the substituted fluorine atoms is within 1 to 5.
The additive dithiocyano alkane comprises the following components in percentage by weight in the electrolyte: 0.2-5%, and the preferable weight ratio is: 1 percent.
Other supplementary additives are: vinylene Carbonate (VC), the total amount of the supplementary additives accounts for the weight of the electrolyte: 1 to 2 percent.
The invention is further illustrated by the following specific examples:
standard of cell for test
And (3) positive electrode: lithium cobaltate;
negative electrode: artificial graphite;
voltage: high voltage 4.4V system;
packaging: and (6) soft packaging the lithium battery.
Comparative example 1
The lithium salt adopts: LiPF6The organic solvent adopts: ethylene Carbonate (EC)/methylethyl carbonate (EMC)/diethyl carbonate (DEC)/Propylene Carbonate (PC) in a mixed solvent at a mass ratio of 25/20/55/5 to obtain a solvent, and dissolving a lithium salt in an organic solvent, wherein LiPF is used6The concentration was 1.0 mol/L. 1% by mass of the total ethylene carbonate is addedEster (VC), Propylene Sulfite (PS) added in an amount of 1% by mass of the total, to obtain a comparative electrolyte.
And testing the conventional indexes of the electrolyte of the comparative example, and obtaining the lithium ion battery according to the battery testing process requirements after the conventional indexes are qualified.
Example 1
The lithium salt adopts: LiPF6The organic solvent adopts: obtaining a solvent from a mixed solvent of Ethylene Carbonate (EC)/methyl ethyl carbonate (EMC)/diethyl carbonate (DEC) according to a mass ratio of 25/25/50, and dissolving a lithium salt in an organic solvent, wherein LiPF6The concentration was 1.0 mol/L. Vinylene Carbonate (VC) was added in an amount of 1% by mass based on the total mass, and dithiodinitrile was added in an amount of 0.2% by mass based on the total mass. The electrolyte of example 1 was obtained. Namely, in the first embodiment, R1 in the additive CNR1SSR2CN is 0; r2 is 0, and the molecular formula is CNSSCN.
Example 2
An electrolyte was prepared and a battery was tested in the same manner as in example 1, except that 1% by mass of dithiomethyldithiobenzonitrile was added to obtain an electrolyte of example 2. That is, in this example 2, R1 is 1; r2 is 0. Molecular formula is CNCH3SSCN, the electrolyte of example 2 was obtained.
Example 3
An electrolyte was prepared and a battery was tested in the same manner as in example 1, except that 1% by mass of dithiodimethyldinitrile was added to obtain an electrolyte of example 3. That is, in this embodiment 3, R1 is 1; r2 is 1. Molecular formula is CNCH3SSCH3CN。
Example 4
An electrolyte was prepared and a battery was tested in the same manner as in example 1, except that 1% by mass of dithiofluoromethyldinitrile was added to obtain an electrolyte of example 4. That is, in example 4, R1 is an alkane having 1 carbon atom, and a hydrogen atom on the alkane is substituted with one fluorine atom. R2 is C1 alkane. Molecular formula is CNCH2FSSCH3CN。
Cells were made and tested from the above comparative examples and examples, with the following being a 300 week cycle data comparison:
| capacity retention ratio% | Increase in thickness% | |
| Comparative example 1 | 78.3 | 7.8 |
| Example 1 | 85.3 | 4.5 |
| Example 2 | 88.3 | 6.1 |
| Example 3 | 86.7 | 5.2 |
| Example 4 | 85.6 | 5.7 |
The following test data comparisons were made after 60 degrees 7 days storage for the batteries made above:
| capacity retention ratio% | Increase in thickness% | |
| Comparative example 1 | 78.3 | 7.8 |
| Example 1 | 85.3 | 4.5 |
| Example 2 | 88.3 | 6.1 |
| Example 3 | 86.7 | 5.2 |
| Example 4 | 85.6 | 5.7 |
According to the test comparison data, the lithium ion battery manufactured by the invention has the advantages that the capacity retention rate of the battery is higher than that of the conventional battery under high voltage no matter after the lithium ion battery is recycled for many times or in the long-time storage process, and meanwhile, the battery flatulence condition under the high voltage is effectively inhibited.
It is to be understood that the above description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and that equivalent changes or modifications in the structure, features and principles of the present invention described in the claims should be included in the claims.
Claims (6)
1. An electrolyte for a lithium ion battery, comprising: organic solvent, lithium salt dissolved in the organic solvent and additive, and is characterized in that:
the additive is as follows: a dithiocyanoalkane corresponding to the formula: CNR1SSR2CN, having the corresponding molecular structural formula:
r1 is alkane with carbon number between 0 and 4, or hydrogen atom on the alkane is replaced by fluorine atom, and the number of the substituted fluorine atoms is within 1 to 5;
r2 is alkane with carbon number between 0 and 4, or hydrogen atom on the alkane is replaced by fluorine atom, and the number of the substituted fluorine atoms is within 1 to 5.
2. The electrolyte of a lithium ion battery according to claim 1, wherein: the additive dithiocyano alkane comprises the following components in percentage by weight in the electrolyte: 0.2 to 5 percent.
3. The electrolyte of a lithium ion battery according to claim 2, wherein: the electrolyte is also added with any one or combination of the following materials: vinylene carbonate and propylene sulfite.
4. The electrolyte of a lithium ion battery according to claim 2, wherein: the organic solvent is as follows: any one or combination of two or more of ethylene carbonate, dimethyl carbonate, diethyl carbonate, ethyl methyl carbonate, propylene carbonate, methyl propyl carbonate, butylene carbonate, ethyl acetate, propylene acetate and the like.
5. The electrolyte of a lithium ion battery according to claim 4, wherein: the weight ratio of the materials in the organic solvent is as follows: ethylene carbonate methyl ethyl carbonate: diethyl carbonate 25:25: 50.
6. The electrolyte of a lithium ion battery according to claim 1, wherein: the lithium salt is: and the concentration of the lithium hexafluorophosphate in the electrolyte is 0.8-1.5 mo 1/L.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010395703.4A CN111613835A (en) | 2020-05-12 | 2020-05-12 | Electrolyte of lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010395703.4A CN111613835A (en) | 2020-05-12 | 2020-05-12 | Electrolyte of lithium ion battery |
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| CN111613835A true CN111613835A (en) | 2020-09-01 |
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| CN202010395703.4A Pending CN111613835A (en) | 2020-05-12 | 2020-05-12 | Electrolyte of lithium ion battery |
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Application publication date: 20200901 |