CN109256584A - A kind of lithium-ion battery electrolytes and the lithium ion battery using the electrolyte - Google Patents
A kind of lithium-ion battery electrolytes and the lithium ion battery using the electrolyte Download PDFInfo
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- CN109256584A CN109256584A CN201810956638.0A CN201810956638A CN109256584A CN 109256584 A CN109256584 A CN 109256584A CN 201810956638 A CN201810956638 A CN 201810956638A CN 109256584 A CN109256584 A CN 109256584A
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- lithium
- ion battery
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- additive
- lithium ion
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 82
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 57
- 239000000654 additive Substances 0.000 claims abstract description 18
- 230000000996 additive effect Effects 0.000 claims abstract description 17
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 12
- 150000002148 esters Chemical class 0.000 claims abstract description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims abstract description 9
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 9
- 239000011593 sulfur Substances 0.000 claims abstract description 9
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 7
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 7
- 239000003960 organic solvent Substances 0.000 claims abstract description 7
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 6
- QGHDLJAZIIFENW-UHFFFAOYSA-N 4-[1,1,1,3,3,3-hexafluoro-2-(4-hydroxy-3-prop-2-enylphenyl)propan-2-yl]-2-prop-2-enylphenol Chemical group C1=C(CC=C)C(O)=CC=C1C(C(F)(F)F)(C(F)(F)F)C1=CC=C(O)C(CC=C)=C1 QGHDLJAZIIFENW-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910019142 PO4 Inorganic materials 0.000 claims abstract description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims abstract description 5
- 239000010452 phosphate Substances 0.000 claims abstract description 5
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 claims abstract description 3
- MWQJGSUQGMJVCS-UHFFFAOYSA-N N=[S+]C(F)(F)F.[Li] Chemical compound N=[S+]C(F)(F)F.[Li] MWQJGSUQGMJVCS-UHFFFAOYSA-N 0.000 claims abstract description 3
- QRMHDYCPNIVCBO-UHFFFAOYSA-N [SH2]=N.[F] Chemical compound [SH2]=N.[F] QRMHDYCPNIVCBO-UHFFFAOYSA-N 0.000 claims abstract description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229960002645 boric acid Drugs 0.000 claims abstract description 3
- 235000010338 boric acid Nutrition 0.000 claims abstract description 3
- DGTVXEHQMSJRPE-UHFFFAOYSA-M difluorophosphinate Chemical compound [O-]P(F)(F)=O DGTVXEHQMSJRPE-UHFFFAOYSA-M 0.000 claims abstract description 3
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 3
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 claims abstract description 3
- 229910001486 lithium perchlorate Inorganic materials 0.000 claims abstract description 3
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 claims abstract description 3
- 235000006408 oxalic acid Nutrition 0.000 claims abstract description 3
- UJMWVICAENGCRF-UHFFFAOYSA-N oxygen difluoride Chemical compound FOF UJMWVICAENGCRF-UHFFFAOYSA-N 0.000 claims abstract description 3
- DEUISMFZZMAAOJ-UHFFFAOYSA-N lithium dihydrogen borate oxalic acid Chemical compound B([O-])(O)O.C(C(=O)O)(=O)O.C(C(=O)O)(=O)O.[Li+] DEUISMFZZMAAOJ-UHFFFAOYSA-N 0.000 claims abstract 2
- 150000005840 aryl radicals Chemical group 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 3
- 150000001345 alkine derivatives Chemical class 0.000 claims description 3
- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- 125000002947 alkylene group Chemical group 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 238000006884 silylation reaction Methods 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- -1 difluoro oxalate phosphorus Chemical group 0.000 claims description 2
- 238000006467 substitution reaction Methods 0.000 claims 1
- 238000005868 electrolysis reaction Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 5
- 150000007942 carboxylates Chemical class 0.000 abstract description 2
- MYRUXGCOHIYOBX-UHFFFAOYSA-K [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O.FOC(=O)C(=O)OF Chemical compound [Li+].[Li+].[Li+].[O-]P([O-])([O-])=O.FOC(=O)C(=O)OF MYRUXGCOHIYOBX-UHFFFAOYSA-K 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 30
- 239000007788 liquid Substances 0.000 description 6
- 241000894007 species Species 0.000 description 6
- 239000000243 solution Substances 0.000 description 5
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229960000380 propiolactone Drugs 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- VAYTZRYEBVHVLE-UHFFFAOYSA-N 1,3-dioxol-2-one Chemical compound O=C1OC=CO1 VAYTZRYEBVHVLE-UHFFFAOYSA-N 0.000 description 1
- GWAOOGWHPITOEY-UHFFFAOYSA-N 1,5,2,4-dioxadithiane 2,2,4,4-tetraoxide Chemical class O=S1(=O)CS(=O)(=O)OCO1 GWAOOGWHPITOEY-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- AWKYGJDQIIQRNY-UHFFFAOYSA-K P(=O)([O-])([O-])[O-].[Li+].C(C(=O)O)(=O)O.[F].[Li+].[Li+] Chemical compound P(=O)([O-])([O-])[O-].[Li+].C(C(=O)O)(=O)O.[F].[Li+].[Li+] AWKYGJDQIIQRNY-UHFFFAOYSA-K 0.000 description 1
- IDGCBXSROJHVOG-UHFFFAOYSA-N [Li].[SH2]=N.[F] Chemical compound [Li].[SH2]=N.[F] IDGCBXSROJHVOG-UHFFFAOYSA-N 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- VEZXCJBBBCKRPI-UHFFFAOYSA-N beta-propiolactone Chemical compound O=C1CCO1 VEZXCJBBBCKRPI-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229940116007 ferrous phosphate Drugs 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910000155 iron(II) phosphate Inorganic materials 0.000 description 1
- SDEKDNPYZOERBP-UHFFFAOYSA-H iron(ii) phosphate Chemical compound [Fe+2].[Fe+2].[Fe+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O SDEKDNPYZOERBP-UHFFFAOYSA-H 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- RIUWBIIVUYSTCN-UHFFFAOYSA-N trilithium borate Chemical compound [Li+].[Li+].[Li+].[O-]B([O-])[O-] RIUWBIIVUYSTCN-UHFFFAOYSA-N 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 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
-
- 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
- H01M10/0567—Liquid materials characterised by the additives
-
- 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
A kind of lithium-ion battery electrolytes and the lithium ion battery using the electrolyte, belong to field of lithium ion battery material.The lithium-ion electrolyte includes organic solvent, electric conducting lithium salt and additive, and the additive containing sulfur species by forming.The organic solvent is one or more of carbonic ester, carboxylate, ether, fluoro carbonic ester, alpha-fluorocarboxylate ester, fluoro-ether.The electric conducting lithium salt is one or more of difluoro oxalate lithium phosphate, double fluorine sulfimide lithiums, bis trifluoromethyl sulfimide lithium, difluorophosphate, lithium hexafluoro phosphate, di-oxalate lithium borate, difluorine oxalic acid boracic acid lithium, LiBF4, lithium perchlorate.The present invention enriches the type and range of choice of electrolysis additive, and gained electrolyte improves the various aspects of performance such as the cycle life of lithium ion battery, high/low temperature.
Description
Technical field
The invention belongs to lithium ion battery material technical fields, and in particular to a kind of lithium-ion battery electrolytes and using should
The lithium ion battery of electrolyte.
Background technique
Lithium ion battery is since commercialization, since its specific energy is high, good cycle, be widely used in it is digital,
The fields such as energy storage, power, militay space flight and communication apparatus.However, in recent years lithium ion battery to energy density, cycle life,
More stringent requirements are proposed for high temperature performance, high rate performance etc..
Electrolyte is an important factor for influencing performance of lithium ion battery as the critical material of lithium ion battery, and is electrolysed
Solution additive is wherein extremely crucial component again, and one or more kinds of additives can significantly improve each of lithium ion battery
Aspect performance.Such as: application No. is the inventions of 201610200202.X " a kind of nonaqueous electrolytic solution and to use the nonaqueous electrolytic solution
Lithium secondary battery ", it discloses methane-disulfonic acid methylene ester compounds, can improve the storage of lithium secondary battery and follow
Ring performance.Application No. is the 200710143917.7 invention " compositions of electrolyte of high power lithium ion battery prepared from lithium ferrous phosphate
Object ", it discloses 1,3- sulfonic acid propiolactone compound, can be very good to inhibit battery that inflatable occurs.
However, sulphonic acids additive is the well-known additive of lithium-ion battery electrolytes, they are more or less all deposited
In some problems.Substance is forbidden to use as 1,3- sulfonic acid propiolactone is classified as by European Union；Its stabilization of methane-disulfonic acid methylene base ester
Property is poor, so that electrolyte shortened shelf life.
Summary of the invention
The purpose of the present invention is to solve the above-mentioned problems in the prior art, provide a kind of lithium ion battery electrolysis
Liquid and the lithium ion battery for using the electrolyte.
To achieve the above object, the technical solution adopted by the present invention is as follows:
A kind of lithium-ion battery electrolytes, the electrolyte include organic solvent, electric conducting lithium salt and additive；The addition
By forming containing sulfur species, the sulfur species that contain are selected from one of following structural formula or a variety of for agent:
Wherein R1、R2、R3、R4、R5、R6、R7、R8、R9、R10、R11、R12、R13、R14And R15It is independent to be selected from hydrogen, halogen, take
Generation or unsubstituted alkyl and its alkyl halide alkyl, alkylene, alkynes base, silylation, aryl radical substituted or unsubstituted and its
It is any in halogenated aromatic alkyl, alkoxy and carboxyl.
A kind of lithium ion battery containing above-mentioned electrolyte, the lithium ion battery include positive plate, negative electrode tab, diaphragm with
And electrolyte.
The beneficial effect of the present invention compared with the existing technology is: using containing sulfur species as lithium-ion electrolyte film forming
Additive improves positive and negative pole material surface state, and electrolyte is inhibited to react with positive and negative pole material, improves lithium ion battery
High/low temperature and the various aspects of performance such as cycle life, while enriching electrolysis additive type and range of choice.
Specific embodiment
Below with reference to embodiment, further description of the technical solution of the present invention, and however, it is not limited to this, all right
Technical solution of the present invention is modified or replaced equivalently, and without departing from the spirit and scope of the technical solution of the present invention, should all be contained
Lid is within the protection scope of the present invention.
Specific embodiment 1: present embodiment record is a kind of lithium-ion battery electrolytes, the electrolyte includes
Organic solvent, electric conducting lithium salt and additive；By forming containing sulfur species, described is selected from such as the additive containing sulfur species
One of flowering structure formula is a variety of:
Wherein R1、R2、R3、R4、R5、R6、R7、R8、R9、R10、R11、R12、R13、R14And R15It is independent to be selected from hydrogen, halogen, take
Generation or unsubstituted alkyl and its alkyl halide alkyl, alkylene, alkynes base, silylation, aryl radical substituted or unsubstituted and its
It is any in halogenated aromatic alkyl, alkoxy and carboxyl.
Specific embodiment 2: lithium-ion battery electrolytes described in specific embodiment one, the additive accounts for electrolysis
The 0.1%~10% of liquid gross mass.
Specific embodiment 3: lithium-ion battery electrolytes described in specific embodiment two, the additive accounts for electrolysis
The 0.3%~5% of liquid gross mass.
Specific embodiment 4: lithium-ion battery electrolytes described in specific embodiment one, the organic solvent is carbon
One or more of acid esters, carboxylate, ether, fluoro carbonic ester, alpha-fluorocarboxylate ester, fluoro-ether.
Specific embodiment 5: lithium-ion battery electrolytes described in specific embodiment one, the electric conducting lithium salt is two
Fluorine oxalic acid lithium phosphate, double fluorine sulfimide lithiums, bis trifluoromethyl sulfimide lithium, difluorophosphate, lithium hexafluoro phosphate, double grass
One or more of sour lithium borate, difluorine oxalic acid boracic acid lithium, LiBF4, lithium perchlorate.
Specific embodiment 6: a kind of containing electrolyte described in any specific embodiment of specific embodiment one to five
Lithium ion battery, the lithium ion battery include positive plate, negative electrode tab, diaphragm and electrolyte.
Involved additive containing sulfur species in embodiment and comparative example:
Comparative example 1
Solvent ethylene carbonate/methyl ethyl carbonate/diethyl carbonate 1:1:1 in mass ratio is mixed, by the total matter of electrolyte
Amount calculates the lithium hexafluoro phosphate of the addition 13% inside mixed liquor, obtains electrolyte.It injects the electrolyte into comprising positive plate, bear
In the battery core of the non-fluid injection of pole piece and diaphragm, lithium ion battery is made.
Comparative example 2
Solvent ethylene carbonate/propylene carbonate/methyl ethyl carbonate/diethyl carbonate 1:1:1:1 in mass ratio is mixed,
Calculated by electrolyte gross mass added inside mixed liquor 1% vinylene carbonate, 9% lithium hexafluoro phosphate and 7% it is double
Fluorine sulfimide lithium, obtains electrolyte.It injects the electrolyte into in the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 1
Addition accounts for the T1 of electrolyte gross mass 0.1% on the basis of comparative example 1, obtains electrolyte.Inject the electrolyte into and
In the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 2
Addition accounts for the T2 of electrolyte gross mass 10% on the basis of comparative example 1, obtains electrolyte.It injects the electrolyte into and right
In the identical battery core of ratio 1, lithium ion battery is made.
Embodiment 3
Addition accounts for the T3 of electrolyte gross mass 0.5% on the basis of comparative example 1, obtains electrolyte.Inject the electrolyte into and
In the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 4
Addition accounts for the T4 of electrolyte gross mass 1% on the basis of comparative example 1, obtains electrolyte.It injects the electrolyte into and right
In the identical battery core of ratio 1, lithium ion battery is made.
Embodiment 5
Addition accounts for the T5 of electrolyte gross mass 2% on the basis of comparative example 1, obtains electrolyte.It injects the electrolyte into and right
In the identical battery core of ratio 1, lithium ion battery is made.
Embodiment 6
Addition accounts for the T6 of electrolyte gross mass 1% on the basis of comparative example 1, obtains electrolyte.It injects the electrolyte into and right
In the identical battery core of ratio 1, lithium ion battery is made.
Embodiment 7
Addition accounts for the T7 of electrolyte gross mass 0.3% on the basis of comparative example 1, obtains electrolyte.Inject the electrolyte into and
In the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 8
Addition accounts for the T1 and 0.5T7 of electrolyte gross mass 6% on the basis of comparative example 2, obtains electrolyte.Electrolyte is infused
Enter in the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 9
Addition accounts for the T6 of the T2 and 0.5% of electrolyte gross mass 4% on the basis of comparative example 2, obtains electrolyte.It will electrolysis
In liquid injection and the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 10
Addition accounts for the T5 of the T1 and 0.5% of electrolyte gross mass 2% on the basis of comparative example 2, obtains electrolyte.It will electrolysis
In liquid injection and the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 11
Addition accounts for the T3 and 0.5%T4 of electrolyte gross mass 0.5% on the basis of comparative example 2, obtains electrolyte.It will electrolysis
In liquid injection and the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 12
The T6 that the T3 and 0.5% of the T1,0.5% that account for electrolyte gross mass 0.5% are added on the basis of comparative example 2, obtains
Electrolyte.It injects the electrolyte into in the identical battery core of comparative example 1, lithium ion battery is made.
Embodiment 13
The T7 that the T4 and 0.5% of the T2,0.5% that account for electrolyte gross mass 0.5% are added on the basis of comparative example 2, obtains
Electrolyte.It injects the electrolyte into in the identical battery core of comparative example 1, lithium ion battery is made.
Electrochemical property test is carried out to the above comparative example and the resulting lithium ion battery of embodiment
High temperature storage experiment: by embodiment 1~13 and 1~2 gained battery of comparative example at room temperature with the charge and discharge of 1C times
Rate carries out 5 charge and discharge cycles tests, and then 1C multiplying power is charged to full power state.1C capacity Q and internal resistance of cell T is recorded respectively.
The battery of full power state is stored 14 days at 60 DEG C, records internal resistance of cell T0With 1C discharge capacity Q1, then by battery in room
With the multiplying power charge and discharge of 1C 5 weeks under temperature, 1C discharge capacity Q is recorded2, battery high-temperature memory capacity conservation rate is calculated, capacity returns
The multiple experimental datas such as rate and internal resistance change rate, record result such as table 1.
The calculation formula wherein used is as follows:
Low temperature discharge experiment: by embodiment 1~13 and 1~2 gained battery of comparative example at room temperature with 1C multiplying power progress 5 times
Then charge and discharge cycles are charged to full power state with 1C multiplying power, record 1C capacity Q0.By the battery under full power state at -20 DEG C
Under shelve 4h after, with 0.2C multiplying power discharging to 3V, record discharge capacity Q3, can be calculated low temperature discharge capacity conservation rate, record
As a result such as table 1.
Low temperature discharge capacity conservation rate calculation is following formula:
The comparison of 1 embodiment and comparative example experimental result of table
As can be seen from Table 1, it is improved significantly using the cycle performance of the lithium ion battery of electrolyte of the present invention, and
The high temperature and cryogenic property of battery also be improved significantly.
Claims (6)
1. a kind of lithium-ion battery electrolytes, it is characterised in that: the electrolyte includes organic solvent, electric conducting lithium salt and addition
Agent；For the additive by forming containing sulfur species, the sulfur species that contain are selected from one of following structural formula or a variety of:
Wherein R1、R2、R3、R4、R5、R6、R7、R8、R9、R10、R11、R12、R13、R14And R15It is independent selected from hydrogen, halogen, substitution or
Unsubstituted alkyl and its alkyl halide alkyl, alkylene, alkynes base, silylation, aryl radical substituted or unsubstituted and its halogenated
It is any in aryl radical, alkoxy and carboxyl.
2. lithium-ion battery electrolytes according to claim 1, it is characterised in that: the additive accounts for electrolyte gross mass
0.1%~10%.
3. lithium-ion battery electrolytes according to claim 2, it is characterised in that: the additive accounts for electrolyte gross mass
0.3%~5%.
4. lithium-ion battery electrolytes according to claim 1, it is characterised in that: the organic solvent is carbonic ester, carboxylic
One or more of acid esters, ether, fluoro carbonic ester, alpha-fluorocarboxylate ester, fluoro-ether.
5. lithium-ion battery electrolytes according to claim 1, it is characterised in that: the electric conducting lithium salt is difluoro oxalate phosphorus
Sour lithium, double fluorine sulfimide lithiums, bis trifluoromethyl sulfimide lithium, difluorophosphate, lithium hexafluoro phosphate, di-oxalate lithium borate,
One or more of difluorine oxalic acid boracic acid lithium, LiBF4, lithium perchlorate.
6. a kind of lithium ion battery containing electrolyte described in Claims 1 to 5 any claim, it is characterised in that: described
Lithium ion battery includes positive plate, negative electrode tab, diaphragm and electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956638.0A CN109256584A (en) | 2018-08-21 | 2018-08-21 | A kind of lithium-ion battery electrolytes and the lithium ion battery using the electrolyte |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810956638.0A CN109256584A (en) | 2018-08-21 | 2018-08-21 | A kind of lithium-ion battery electrolytes and the lithium ion battery using the electrolyte |
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| CN109256584A true CN109256584A (en) | 2019-01-22 |
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| CN201810956638.0A Pending CN109256584A (en) | 2018-08-21 | 2018-08-21 | A kind of lithium-ion battery electrolytes and the lithium ion battery using the electrolyte |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111769325A (en) * | 2020-06-18 | 2020-10-13 | 合肥国轩高科动力能源有限公司 | Lithium-ion battery electrolyte for improving high-low temperature cycle performance and lithium-ion battery |
| CN115732756A (en) * | 2021-08-30 | 2023-03-03 | 张家港市国泰华荣化工新材料有限公司 | Electrolyte and secondary battery using same |
Citations (7)
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| CN111769325B (en) * | 2020-06-18 | 2022-06-07 | 合肥国轩高科动力能源有限公司 | Lithium ion battery electrolyte and lithium ion battery |
| CN115732756A (en) * | 2021-08-30 | 2023-03-03 | 张家港市国泰华荣化工新材料有限公司 | Electrolyte and secondary battery using same |
| CN115732756B (en) * | 2021-08-30 | 2023-11-28 | 张家港市国泰华荣化工新材料有限公司 | Electrolyte and secondary battery using same |
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