CN109860707A - A kind of lithium-ion battery electrolytes and the lithium ion battery containing the electrolyte - Google Patents
A kind of lithium-ion battery electrolytes and the lithium ion battery containing the electrolyte Download PDFInfo
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- CN109860707A CN109860707A CN201811553387.8A CN201811553387A CN109860707A CN 109860707 A CN109860707 A CN 109860707A CN 201811553387 A CN201811553387 A CN 201811553387A CN 109860707 A CN109860707 A CN 109860707A
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- 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
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- 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 provides a kind of lithium-ion battery electrolytes and the lithium ion battery containing the electrolyte, the electrolyte can be improved lithium ion battery room temperature and high-temperature behavior, cyclical stability and storage life including lithium ion battery at elevated pressures and temperatures, and cryogenic property can be improved, concrete scheme is as follows: a kind of lithium-ion battery electrolytes organic solvent, electric conducting lithium salt, additive A, the additive A is as shown in structure formula (I), wherein, R1Selected from carbon, sulphur or silicon, R2Selected from hydrogen, halogen, C1~4Alkyl and its halogenated alkyl, C6~10Aryl and its halogenated aryl, C1‑C4Itrile group, C2‑C6Alkenyl, alkoxy and carboxyl.The invention belongs to technical field of lithium ion, the circulation for significantly improving battery and high-temperature storage performance its advantage lies in being able to, while improving cryogenic property.
Description
Technical field
The invention belongs to technical field of lithium ion more particularly to a kind of lithium-ion battery electrolytes and contain the electrolysis
The lithium ion battery of liquid.
Background technique
Lithium ion battery has been used widely in the fields such as consumer battery and power battery, such as mobile phone, digital phase
Machine, laptop, pure electric automobile and hybrid-electric car.This is mainly due to lithium ion battery unique advantage, such as:
High-energy-density, high working voltage, it is environmental-friendly, have extended cycle life.But existing lithium-ion battery system can not expire
Pursuit of the sufficient people to battery durable ability, therefore, the positive and negative pole material of high capacity (such as: nickelic anode, lithium-rich manganese-based anode,
Silicon-based anode) concern of the exploitation by scientific research personnel.
However, gradually appearing poor circulation, high-temperature storage expansion in the use process of high capacity positive and negative pole material greatly
The problem of.In terms of this is mainly due to following two: first, the surface-actives such as nickelic positive electrode, silicon based anode material are higher,
It is easily reacted with electrolyte, so that electrolyte is constantly consumed；Second, Ni is easy dissolution in cyclic process in high-nickel material,
The solid electrolyte interface film (being commonly called as SEI film) for spreading through electrolysis liquid phase, depositing to negative side and destroying negative terminal surface, and then lead
Send a telegraph tankage sharp-decay.Therefore, there is high stability and excellent cycling in lithium ion battery it is necessory to develop one kind
The electrolyte of performance.
Summary of the invention
It, should the object of the present invention is to provide a kind of lithium-ion battery electrolytes and containing the lithium ion battery of the electrolyte
Electrolyte can be improved lithium ion battery room temperature and high-temperature behavior, the stable circulation including lithium ion battery at elevated pressures and temperatures
Property and storage life, and cryogenic property can be improved.
To achieve the goals above, the present invention adopts the following technical scheme that:
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt, the lithium-ion battery electrolytes further include
Additive A, the additive A are to meet at least one substance shown in structure formula (I), and structure formula (I) is expressed as follows:
R in structure formula (I)1R in carbon, sulphur or silicon, structure formula (I)2Selected from hydrogen, halogen, C1~4Alkyl and its halogen
Substituted alkyl, C6~10Aryl and its halogenated aryl, C1-C4Itrile group, C2-C6One of alkenyl, alkoxy and carboxyl.
Preferably, the R in structure formula (I)1R in carbon or sulphur, structure formula (I)2Selected from fluorine, methyl, ethyl, fluoro
Methyl, phenyl, difluorophenyl, vinyl, acrylic, fluoropropenes base or carboxymethyl.
Further, the content of the additive A accounts for the 0.1%~10.00% of electrolyte gross mass.
Further, the content of the organic solvent accounts for the 70%~91.9% of electrolyte gross mass.
Further, the content of the electric conducting lithium salt accounts for the 8.00%~20.00% of electrolyte gross mass.
Further, the organic solvent is one of carbonic ester, carboxylate, fluoro-ether or a variety of combinations.
Further, the electric conducting lithium salt is lithium hexafluoro phosphate (LiPF6), difluorophosphate (LiPO2F2), double fluorine sulphonyl
Imine lithium (LiFSI), difluoro double oxalic acid lithium phosphates (LiDFOP), tetrafluoro oxalic acid lithium phosphate (LiTFOP), difluorine oxalic acid boracic acid lithium
(LiDFOB), one of bis- (trimethyl fluoride sulfonyl) imine lithiums (LiTFSI) and di-oxalate lithium borate (LiBOB) are a variety of
Combination.
Further, the lithium-ion battery electrolytes further include with the sulfuric acid vinyl ester of arbitrary proportion interworking, fluoro carbon
Vinyl acetate, 1,3- propene sultone, vinylethylene carbonate, 1,3- propane sultone, interworking total amount are no more than electricity
Solve the 10% of liquid gross mass.
A kind of lithium ion battery containing above-mentioned lithium-ion battery electrolytes, including the anode containing positive electrode active materials
Piece, the negative electrode tab containing negative electrode active material, diaphragm and the lithium-ion battery electrolytes.
The present invention compared with the existing technology the utility model has the advantages that
A kind of lithium-ion battery electrolytes provided by the present invention can be on positive electrode surface by the way that additive A is added
Stable and fine and close passivating film is formed, to inhibit the oxidation activity of positive electrode, reduces electricity during circulation or high-temperature storage
Solve the oxygenolysis of liquid.Meanwhile additive A can be reduced to form low-impedance interface prior to solvent on negative electrode material surface
Film is conducive to the cryogenic property for improving battery.
Specific embodiment
Below by exemplary embodiment, the present invention will be further elaborated；But the scope of the present invention should not limit to
In the range of embodiment, any variation or change without departing from present subject matter can be understood by the person skilled in the art,
All within protection scope of the present invention.
Specific embodiment one
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive A, the additive A are full
At least one substance shown in sufficient structure formula (I), structure formula (I) are expressed as follows:
Further, R in structure formula (I)1The R in carbon, sulphur or silicon, structure formula (I)2Selected from hydrogen, halogen, C1~4Alkyl
And its halogenated alkyl, C6~10Aryl and its halogenated aryl, C1-C4Itrile group, C2-C6One of alkenyl, alkoxy and carboxyl.
Further, the content of the additive A accounts for the 0.1%~10.00% of electrolyte gross mass.
Preferably, R in structure formula (I)1Selected from carbon or sulphur.
Preferably, R in structure formula (I)2Selected from hydrogen, halogen, C1~4Alkyl and its halogenated alkyl, C6~10Aryl and its halogenated
Aryl, C1-C4Itrile group, C2-C6One of alkenyl, alkoxy and carboxyl.
Preferably, R in structure formula (I)2Selected from fluorine, methyl, ethyl, fluoromethyl, phenyl, difluorophenyl, vinyl, third
Alkenyl, fluoropropenes base or carboxymethyl.
Preferably, additive A is selected from least one of following substance:
Further, the content of the organic solvent accounts for the 70%~91.9% of electrolyte gross mass, the electric conducting lithium salt
Content account for the 8.00%~20.00% of electrolyte gross mass.
Further, the organic solvent is one of carbonic ester, carboxylate, fluoro-ether or a variety of combinations.
Further, the electric conducting lithium salt is lithium hexafluoro phosphate (LiPF6), difluorophosphate (LiPO2F2), double fluorine sulphonyl
Imine lithium (LiFSI), difluoro double oxalic acid lithium phosphates (LiDFOP), tetrafluoro oxalic acid lithium phosphate (LiTFOP), difluorine oxalic acid boracic acid lithium
(LiDFOB), one of bis- (trimethyl fluoride sulfonyl) imine lithiums (LiTFSI) and di-oxalate lithium borate (LiBOB) are a variety of
Combination.
Further, the lithium-ion battery electrolytes further include with the sulfuric acid vinyl ester of arbitrary proportion interworking, fluoro carbon
Vinyl acetate, 1,3- propene sultone, vinylethylene carbonate, 1,3- propane sultone, interworking total amount are no more than electricity
Solve the 10% of liquid gross mass.
A kind of lithium ion battery containing above-mentioned lithium-ion battery electrolytes, including the anode containing positive electrode active materials
Piece, the negative electrode tab containing negative electrode active material, diaphragm and the lithium-ion battery electrolytes.
Embodiment 1
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 91.9% of sub- battery electrolyte gross mass is made of cyclic solvent (ethylene carbonate) and linear solvent (methyl ethyl carbonate),
The mass ratio of ethylene carbonate and methyl ethyl carbonate is 1:2.The electric conducting lithium salt accounts for lithium-ion battery electrolytes gross mass
8%, the electric conducting lithium salt is lithium hexafluoro phosphate.The electrolysis additive A is A1, and A1 accounts for the 0.1% of electrolyte gross mass.It will
The electrolyte of the present embodiment is used for LiNi0.6Co0.2Mn0.2O2/ graphite soft-package battery.
Embodiment 2
A kind of lithium-ion battery electrolytes are made of organic solvent, electric conducting lithium salt and additive, and the organic solvent accounts for lithium
The 85.00% of ion battery electrolyte gross mass is made of cyclic solvent (ethylene carbonate) and linear solvent (propyl propionate),
The mass ratio of ethylene carbonate and propyl propionate is 1:2.The electric conducting lithium salt accounts for the 12% of lithium-ion battery electrolytes gross mass,
The electric conducting lithium salt is double fluorine sulfimide lithiums.The electrolysis additive A is A1, and A1 accounts for the 3% of electrolyte gross mass.It incite somebody to action this
The electrolyte LiNi of embodiment0.5Co0.2Mn0.3O2/ graphite soft-package battery.
Embodiment 3
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 80% of sub- battery electrolyte gross mass, by cyclic solvent (ethylene carbonate) and linear solvents (methyl ethyl carbonate, 1,1,2,3-
Four fluoro ethyls -2,2,3,3- tetrafluoro propyl ethers) composition, ethylene carbonate, methyl ethyl carbonate and 1,1,2,3- tetra- fluoro ethyl -2,2,
The mass ratio of 3,3- tetrafluoro propyl ether is 1:1:1.The electric conducting lithium salt accounts for the 10% of lithium-ion battery electrolytes gross mass, described
Electric conducting lithium salt is the double oxalic acid lithium phosphates of difluoro.The electrolysis additive A is A1, and A1 accounts for the 10% of electrolyte gross mass.It incite somebody to action this
The electrolyte LiNi of embodiment0.8Co0.15Al0.05O2/ graphite soft-package battery.
Embodiment 4
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 91% of sub- battery electrolyte gross mass, by cyclic solvent (ethylene carbonate) and linear solvents (methyl ethyl carbonate, carbonic acid diethyl
Ester) composition, the mass ratio of ethylene carbonate, methyl ethyl carbonate and diethyl carbonate is 1:1:1, and the electric conducting lithium salt accounts for lithium ion
The 8.00% of battery electrolyte gross mass, the electric conducting lithium salt are lithium hexafluoro phosphate；The electrolysis additive A is A2, and A2 is accounted for
The 1% of electrolyte gross mass.By the electrolyte LiNi of the present embodiment0.5Co0.2Mn0.3O2The compound soft-package battery of/silicon-carbon.
Embodiment 5
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 77% of sub- battery electrolyte gross mass, by cyclic solvent (ethylene carbonate) and linear solvents (methyl ethyl carbonate and carbonic acid two
Ethyl ester) composition, the mass ratio of ethylene carbonate, methyl ethyl carbonate and diethyl carbonate is 3:5:2, the electric conducting lithium salt account for lithium from
The 20% of sub- battery electrolyte gross mass, the electric conducting lithium salt are lithium hexafluoro phosphate；The electrolysis additive A is A2, and A2 is accounted for
The 3% of electrolyte gross mass.By the electrolyte LiNi of the present embodiment0.6Co0.2Mn0.2O2/ graphite soft-package battery.
Embodiment 6
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 81% of sub- battery electrolyte gross mass, by cyclic solvent (ethylene carbonate) and linear solvents (methyl ethyl carbonate and carbonic acid two
Ethyl ester) composition, the mass ratio of ethylene carbonate, methyl ethyl carbonate and diethyl carbonate is 3:5:2.The electric conducting lithium salt account for lithium from
The 14% of sub- battery electrolyte gross mass, the electric conducting lithium salt are lithium hexafluoro phosphate；The electrolysis additive A is A2, and A2 is accounted for
The 5.00% of electrolyte gross mass.By the electrolyte LiNi of the present embodiment0.5Co0.2Mn0.3O2/ graphite soft-package battery.
Embodiment 7
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 81% of sub- battery electrolyte gross mass is made of, carbon cyclic solvent (ethylene carbonate) and linear solvent (methyl ethyl carbonate)
The mass ratio of vinyl acetate and methyl ethyl carbonate is 1:2.The electric conducting lithium salt accounts for the 16% of lithium-ion battery electrolytes gross mass,
The electric conducting lithium salt is lithium hexafluoro phosphate, and the electrolysis additive A is A3, and A3 accounts for the 2% of electrolyte gross mass, the electrolysis
It further include fluorinated ethylene carbonate and 1 in liquid, 3- propane sultone, the fluorinated ethylene carbonate accounts for electrolyte gross mass
0.5%, 1, the 3- propane sultone accounts for the 0.5% of electrolyte gross mass.By the electrolyte of the present embodiment LiCoO2/ stone
Black soft-package battery.
Embodiment 8
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 85% of sub- battery electrolyte gross mass is made of, carbon cyclic solvent (ethylene carbonate) and linear solvent (methyl ethyl carbonate)
The mass ratio of vinyl acetate and methyl ethyl carbonate is 1:2.The electric conducting lithium salt accounts for the 12% of lithium-ion battery electrolytes gross mass,
The electric conducting lithium salt is lithium hexafluoro phosphate, and the electrolysis additive A is A3, and A3 accounts for the 3% of electrolyte gross mass.This is implemented
The electrolyte LiCoO2/ graphite soft-package battery of example.
Embodiment 9
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 74% of sub- battery electrolyte gross mass is made of, carbon cyclic solvent (ethylene carbonate) and linear solvent (methyl ethyl carbonate)
The mass ratio of vinyl acetate and methyl ethyl carbonate is 1:2.The electric conducting lithium salt accounts for the 16% of lithium-ion battery electrolytes gross mass,
The electric conducting lithium salt is lithium hexafluoro phosphate, and the electrolysis additive A is A3, and A3 accounts for the 10% of electrolyte gross mass.By this reality
Apply the electrolyte LiNi of example1/3Co1/3Mn1/3O2/ graphite soft-package battery.
Embodiment 10
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 72.9% of sub- battery electrolyte gross mass is made of cyclic solvent (ethylene carbonate) and linear solvent (methyl ethyl carbonate),
The mass ratio of ethylene carbonate and methyl ethyl carbonate is 1:2.The electric conducting lithium salt accounts for lithium-ion battery electrolytes gross mass
16%, the electric conducting lithium salt is lithium hexafluoro phosphate, and the electrolysis additive A is A4, and A4 accounts for the 0.01% of electrolyte gross mass,
It further include fluorinated ethylene carbonate and vinylethylene carbonate in the electrolyte, it is total that the fluorinated ethylene carbonate accounts for electrolyte
The 10% of quality, the vinylethylene carbonate account for the 1% of electrolyte gross mass.By the electrolyte LiCoO2/ of the present embodiment
Graphite soft-package battery.
Embodiment 11
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 87% of sub- battery electrolyte gross mass is made of, carbon cyclic solvent (ethylene carbonate) and linear solvent (methyl ethyl carbonate)
The mass ratio of vinyl acetate and methyl ethyl carbonate is 1:2.The electric conducting lithium salt accounts for the 8% of lithium-ion battery electrolytes gross mass,
The electric conducting lithium salt is lithium hexafluoro phosphate, and the electrolysis additive A is A4, and A4 accounts for the 5% of electrolyte gross mass.This is implemented
The electrolyte LiCoO2/ graphite soft-package battery of example.
Embodiment 12
A kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt and additive, the organic solvent account for lithium from
The 82% of sub- battery electrolyte gross mass is made of, carbon cyclic solvent (ethylene carbonate) and linear solvent (methyl ethyl carbonate)
The mass ratio of vinyl acetate and methyl ethyl carbonate is 1:2.The electric conducting lithium salt accounts for the 12% of lithium-ion battery electrolytes gross mass,
The electric conducting lithium salt is lithium hexafluoro phosphate, and the electrolysis additive A is A4, and A4 accounts for the 6% of electrolyte gross mass.This is implemented
The electrolyte LiNi of example0.8Co0.1Mn0.1O2/ graphite soft-package battery.
Comparative example 1
The preparation method of the electrolyte of this comparative example is same as Example 1, the difference is that not using additive A 1, has
Solvent accounts for the 92% of lithium-ion battery electrolytes gross mass, this electrolyte is applied in the same manner as shown in Example 1
Its performance is tested in battery.
Comparative example 2
The preparation method of the electrolyte of this comparative example is same as Example 2, the difference is that not using additive A 1, has
Solvent accounts for the 88% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 2
Its performance is tested in battery.
Comparative example 3
The preparation method of the electrolyte of this comparative example is same as Example 3, the difference is that not using additive A 1, has
Solvent accounts for the 90% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 3
Its performance is tested in battery.
Comparative example 4
The preparation method of the electrolyte of this comparative example is same as Example 4, the difference is that not using additive A 2, has
Solvent accounts for the 92% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 4
Its performance is tested in battery.
Comparative example 5
The preparation method of the electrolyte of this comparative example is same as Example 5, the difference is that not using additive A 2, has
Solvent accounts for the 90% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 5
Its performance is tested in battery.
Comparative example 6
The preparation method of the electrolyte of this comparative example is same as Example 6, the difference is that not using additive A 2, has
Solvent accounts for the 86% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 6
Its performance is tested in battery.
Comparative example 7
The preparation method of the electrolyte of this comparative example is same as Example 7, the difference is that not using additive A 3, has
Solvent accounts for the 83% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 7
Its performance is tested in battery.
Comparative example 8
The preparation method of the electrolyte of this comparative example is same as Example 8, the difference is that not using additive A 3, has
Solvent accounts for the 88% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 8
Its performance is tested in battery.
Comparative example 9
The preparation method of the electrolyte of this comparative example is same as Example 9, the difference is that not using additive A 3, has
Solvent accounts for the 84% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as Example 9
Its performance is tested in battery.
Comparative example 10
The preparation method of the electrolyte of this comparative example is same as in Example 10, the difference is that not using additive A 4, has
Solvent accounts for the 73% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method same as in Example 10
Its performance is tested in battery.
Comparative example 11
The preparation method of the electrolyte of this comparative example is identical as embodiment 11, the difference is that not using additive A 4, has
Solvent accounts for the 92% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method identical with embodiment 11
Its performance is tested in battery.
Comparative example 12
The preparation method of the electrolyte of this comparative example is identical as embodiment 12, the difference is that not using additive A 4, has
Solvent accounts for the 88% of lithium-ion battery electrolytes gross mass, this electrolyte is applied to according to method identical with embodiment 12
Its performance is tested in battery.
The application experiment of embodiment and comparative example:
Charge-discharge test condition: in order to measure the battery charge and discharge performance using electrolyte produced by the present invention, carry out with
Lower operation: conventionally preparing positive/negative plate, and electrolyte fluid injection in glove box is prepared using each embodiment and uses
Above-mentioned pole piece prepares 785075 type soft-package batteries, with new prestige (BS-9300R type) battery test system to the 785075 types electricity of preparation
Pond carries out charge-discharge test, while being compared with the battery of corresponding comparative example electrolyte preparation.Battery is placed at 25 DEG C, with
Charge and discharge cycles store 30 days with full electricity is placed at 60 DEG C under 2.5~4.3V, 1C multiplying power.Expansion rate calculation is following formula:
Wherein, T is the cell thickness after 60 DEG C of storages, T0For the cell thickness before 60 DEG C of storages.Lithium ion battery test
Partial results are referring to table 1.
Test result after the charge and discharge cycles and high temperature storage of 1 embodiment and comparative example of table
As can be seen from Table 1, additive A is to the full electricity storage of the capacity retention ratio and high temperature of lithium ion battery normal temperature circulation
Expansion rate has apparent advantageous effects, and the present invention has performance advantage outstanding into electrolyte using additive A, main to show
The cell expansion rate of full electricity storage under the circulation volume conservation rate and reduction high temperature for promoting battery.Embodiment 1-12 is substantially better than
Its comparative example.
Therefore the battery of application electrolyte of the present invention has high security performance and storage performance, has high market
Value and social benefit.It is illustrating for possible embodiments of the invention above, but guarantor of the invention can not be limited
Protect range.
Claims (10)
1. a kind of lithium-ion battery electrolytes, including organic solvent, electric conducting lithium salt, it is characterised in that: the lithium ion battery battery
Solving liquid further includes additive A, and the additive A is to meet at least one substance shown in structure formula (I), and structure formula (I) indicates
It is as follows:
2. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that: the R in structure formula (I)1It is selected from
Carbon, sulphur or silicon, the R in structure formula (I)2Selected from hydrogen, halogen, C1~4Alkyl and its halogenated alkyl, C6~10Aryl and its halogenated virtue
Base, C1-C4Itrile group, C2-C6One of alkenyl, alkoxy and carboxyl.
3. a kind of lithium-ion battery electrolytes according to claim 2, it is characterised in that: the R in structure formula (I)1Selected from carbon
Or sulphur, the R in structure formula (I)2Selected from fluorine, methyl, ethyl, fluoromethyl, phenyl, difluorophenyl, vinyl, acrylic, fluorine
For acrylic or carboxymethyl.
4. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that: the content of the additive A
Account for the 0.1%~10.00% of electrolyte gross mass.
5. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that: the content of the organic solvent accounts for
The 70%~91.9% of electrolyte gross mass.
6. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that: the content of the electric conducting lithium salt accounts for
The 8.00%~20.00% of electrolyte gross mass.
7. a kind of lithium-ion battery electrolytes according to claim 4, it is characterised in that: the organic solvent is carbonic acid
One of ester, carboxylate, fluoro-ether or a variety of combinations.
8. a kind of lithium-ion battery electrolytes according to claim 5, it is characterised in that: the electric conducting lithium salt is hexafluoro phosphorus
Sour lithium (LiPF6), difluorophosphate (LiPO2F2), double fluorine sulfimide lithiums (LiFSI), the double oxalic acid lithium phosphates of difluoro
(LiDFOP), tetrafluoro oxalic acid lithium phosphate (LiTFOP), difluorine oxalic acid boracic acid lithium (LiDFOB), bis- (trimethyl fluoride sulfonyl) imine lithiums
(LiTFSI) and one of di-oxalate lithium borate (LiBOB) or a variety of combinations.
9. the lithium-ion battery electrolytes of one kind according to claim 1, it is characterised in that: the lithium ion battery electrolysis
Liquid further includes sub- with the sulfuric acid vinyl ester of arbitrary proportion interworking, fluorinated ethylene carbonate, 1,3- propene sultone, ethylene carbonate
Ethyl ester, 1,3- propane sultone, interworking total amount are no more than the 10% of electrolyte gross mass.
10. a kind of lithium ion battery containing lithium-ion battery electrolytes described in claim 1-8 any claim, special
Sign is: including the positive plate containing positive electrode active materials, the negative electrode tab containing negative electrode active material, diaphragm and the lithium ion
Battery electrolyte.
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| CN110600804A (en) * | 2019-10-18 | 2019-12-20 | 深圳市比克动力电池有限公司 | Lithium ion battery electrolyte suitable for NCM811 and SiO-C material system and preparation method thereof |
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Address after: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant after: Zhuhai Guanyu Battery Co., Ltd. Address before: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant before: Zhuhai Coslight Battery Co., Ltd. |
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Address after: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant after: Zhuhai Guanyu Battery Co., Ltd Address before: 519180 No. 209 Pearl Peak Avenue, Jingan Town, Doumen District, Zhuhai City, Guangdong Province Applicant before: ZHUHAI COSLIGHT BATTERY Co.,Ltd. |
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Application publication date: 20190607 |