CN106532123A - Electrolyte for lithium-ion battery and battery containing electrolyte - Google Patents
Electrolyte for lithium-ion battery and battery containing electrolyte Download PDFInfo
- Publication number
- CN106532123A CN106532123A CN201611262283.2A CN201611262283A CN106532123A CN 106532123 A CN106532123 A CN 106532123A CN 201611262283 A CN201611262283 A CN 201611262283A CN 106532123 A CN106532123 A CN 106532123A
- Authority
- CN
- China
- Prior art keywords
- lithium
- electrolyte
- ion battery
- battery
- difluorophosphate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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
- H01M10/05—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
-
- 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 provides an electrolyte for a lithium-ion battery and a battery containing the electrolyte. The electrolyte for the lithium-ion battery comprises an electrolyte lithium salt, a lipid solvent, lithium difluorophosphate, an ether compound and a high-voltage stabilizer, wherein the electrolyte lithium salt, the lipid solvent, the lithium difluorophosphate, the ether compound and the high-voltage stabilizer are mixed at a certain ratio to prepare the electrolyte; the ether compound is a soluble cosolvent of the lithium difluorophosphate; the weight of the lithium difluorophosphate accounts for more than 1% of total weight of the solvent; the weight of the ether compound accounts for 1%-10% of total weight of the solvent; and the weight of the high-voltage stabilizer accounts for 0.5%-5% of total weight of the solvent. According to the battery containing the electrolyte for the lithium-ion battery, dissolution of metal ions in a positive electrode material can be effectively inhibited and impedance of a negative electrode can be effectively reduced. According to the electrolyte for the lithium-ion battery, the problem of dissolution of the lithium difluorophosphate in an ester electrolyte is effectively solved, the cycling stability of the battery at high voltage can be greatly improved and the high-temperature cycle performance and the low-temperature characteristic of the battery are improved.
Description
Technical field
The invention belongs to lithium secondary battery field, more particularly to a kind of lithium-ion battery electrolytes and containing the electrolyte
Battery, the battery electrolyte can suppress the dissolving of the metal ion of positive electrode, and low cathode film formation impedance, with excellent
High temperature circulation stability and low-temperature characteristics.
Background technology
At present, widely using with products such as smart mobile phone, portable power source, panel computers, lithium battery industry production value are held
It is continuous to increase；At the same time, the application of lithium ion battery has been no longer limited to consumable electronic product, and extension is related to power and energy storage
Two new application directions, are that lithium battery brings the unlimited market space.Thus, extensive application of the lithium battery in electric motor car,
The domestic rapid development of lithium electricity electric motor car, tesla's electric automobile realize that quarter of profitability has started one by international capital market first
" tesla " heat；Energy storage is also become new motive force of growth by the driving of policy and stimulating for carrier network upgrading.In future
In several years, lithium ion battery will become a global industry for constantly expanding.Meanwhile, with the expansion of its suitable application area, to entering
One step improves the requirement of battery behavior also more and more higher.
CN200880007432.8 is disclosed and is used as to can be used to improve non-water power for advantageously being produced with low price industrialization
The method of the difluorophosphate or the electrolyte comprising difluorophosphate of the additive of solution solution battery performance.It is also disclosed to use and includes
The battery with nonaqueous electrolyte of the nonaqueous electrolytic solution of the difluorophosphate produced by the production method.Non-aqueous solution electrolysis are disclosed in specifically
Battery with nonaqueous electrolyte electrolyte comprising difluorophosphate in liquid, the difluorophosphate is by making halogen in addition to fluoride compounds
Compound, LiPF6Acquisition is reacted in nonaqueous solvent with water, difluorophosphate is thus produced, and which can be used as can be used to improve non-aqueous
The additive of electrolyte battery performance.
The CN201010584083.5 present invention can be simple and effective by material that is cheap and being readily available and be obtained with high-purity
To the conventional difluorophosphoric acid salt for being high price and being difficult to obtain.Furthermore it is possible to prepare cryogenic discharging characteristic and heavy-current discharge characteristic
It is excellent, and the also excellent battery of High temperature storage characteristic and cycle characteristics, and without compromising on safety.Make hexafluorophosphate and divide
The compound reaction of the key represented with following formula (1) in son, wherein formula (1) is：Si-O-Si.
CN201610147533.1 is the invention discloses a kind of preparation method of difluorophosphate and the non-water system electricity of lithium ion battery
Solution liquid, under inert gas shielding, with organic solvent as reaction medium, makes lithium hexafluoro phosphate contain in internal layer with ether compound
React in the reaction vessel of PFA or PTFE protective layers, reaction temperature is 50～150 DEG C, and the response time is 5～20h, and reaction terminates
Afterwards product is filtered, is dried to obtain difluorophosphate product.The invention further relates to the lithium of the difluorophosphate of said method preparation
Ion battery non-aqueous electrolyte, including following component：Difluorophosphate：0.5～2.0%；Electrolytic salt：15～20%；Have
Machine solvent：80～85%.Difluorophosphate is prepared by the method, simple to operate, mild condition, purification are convenient, can obtain height
Purity difluorophosphate.
In above-mentioned patent or prior art, it has been shown that add difluorophosphate in the electrolytic solution and can improve lithium ion two
The battery performances such as the low-temperature characteristics of primary cell, cycle characteristics, preservation characteristics.In general, in electrolyte based on carbonic acid lipid
Solvent is wanted, but dissolubility is very low in the electrolytic solution for difluorophosphate, and dissolution velocity is very slow, which is had a strong impact in electrolyte
In practical application.In view of excellent specific property of the difluorophosphate to lithium rechargeable battery, but remain a need for solving difluorophosphate
Solubility problem, research can quickly dissolve the electrolyte of a large amount of difluorophosphates, by adding the cosolvent of difluorophosphate, together
When this electrolyte it is stable at high temperature, high voltage does not decompose, and, dissolving, the drop of metal ion in positive electrode can be suppressed
Low cathode impedance, improves high temperature cyclic performance and the low-temperature characteristics of battery.
The content of the invention
The problem to be solved in the present invention is to provide a kind of lithium ion battery electrolysis that can quickly dissolve a large amount of difluorophosphates
Liquid, and the battery containing the electrolyte is provided, make difluorophosphate be easy to dissolving by adding the dissolving cosolvent of difluorophosphate,
Nitrile compounds are added to increase high voltage stabilizer, while this electrolyte is stable at high temperature, high voltage does not decompose.
For solving above-mentioned technical problem, the technical solution used in the present invention is：A kind of lithium-ion battery electrolytes, its feature
It is：Which includes electrolyte lithium salt, lipid solvent, difluorophosphate, ether compound and high voltage stabilizer, and presses a definite proportion
Example is hybridly prepared into electrolyte；Dissolving cosolvent of the ether compound for difluorophosphate；
Wherein, difluorophosphate weight accounts for more than the 1% of solvent gross weight, ether compound weight account for solvent gross weight 1～
10%, high voltage stabilizer accounts for the 0.5～5% of solvent gross weight.
Preferably, the lipid solvent is ethylene carbonate, Allyl carbonate, dimethyl carbonate, diethyl carbonate, carbon
Sour methyl ethyl ester, gamma-butyrolacton, methyl acetate, ethyl acetate, propyl acetate, butyl acetate, ethyl propionate, propyl propionate, propanoic acid
One or more in butyl ester.
Preferably, the ether compound is tetrahydrofuran, 2- methyltetrahydrofurans, 1,3- dioxolanes, second two
One or more in alcohol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol dimethyl ether and TEG dimethyl ether.
Preferably, the ratio of the difluorophosphate and ether compound is 1:2～5.
Preferably, the high voltage stabilizer be acetonitrile, propionitrile, isopropyl nitrile, succinonitrile, butyronitrile, adiponitrile, valeronitrile,
One or more in glutaronitrile, certain herbaceous plants with big flowers dintrile, acrylonitrile, cyclohexyl nitrile, 1,2- cyclohexyl dintrile, phthalic nitrile.
Preferably, electrolyte lithium salt concentration in the electrolytic solution is 1.4～1.6mol/L.
Preferably, the difluorophosphate accounts for the 2～6% of electrolyte solvent gross weight.
Preferably, the ether compound accounts for the 1%～5% of electrolyte solvent gross weight.
Preferably, the high voltage stabilizer accounts for the 1%～2% of electrolyte solvent gross weight.
A kind of battery containing the electrolyte, its making step are as follows（By weight percentage）：
1）Anode pole piece
1～4% Kynoar (PVDF) is dissolved in 1-Methyl-2-Pyrrolidone solution, by 90～95%
LiCoO2Above-mentioned solution mix homogeneously are added with 1～3% conductive agent white carbon black, the slurry being blended is coated on into the two sides of aluminium foil
Afterwards, drying, rolling after obtain anode pole piece.
2）Cathode pole piece
The CMC thickening agents of 1～4% SBR binding agents and 0.5～1.5% are dissolved in aqueous solution, by 90～95% graphite
Above-mentioned solution mix homogeneously is added, the slurry being blended is coated on behind the two sides of Copper Foil, after drying, rolling, obtain negative pole pole
Piece.
3）The preparation of lithium ion battery
By above-mentioned steps 1）、2）The anode pole piece of preparation, cathode pole piece and isolating membrane make battery core with winding method, using box hat
Packaging, battery core is inserted the electrolyte for irrigating above-mentioned preparation after box hat, makes lithium secondary battery and test Jing after the techniques such as chemical conversion.
The present invention has the advantages and positive effects that：
1st, when lithium-ion battery electrolytes of the present invention adopt difluorophosphate cosolvent ether compound, efficiently solve difluoro phosphorus
Problems of dissolution of the sour lithium in esters electrolyte, and the addition of difluorophosphate can be increased substantially, effectively improve which
The formation of SEI on both positive and negative polarity.Meanwhile, this cooperation makes electrolyte have little viscosity, is conducive to the wellability of electrode material,
Shorten the fluid injection time of lithium secondary battery, improve the high rate performance of battery.
2nd, the height of electrolyte after lithium-ion battery electrolytes of the present invention are added as ether compound using nitrile compounds
Voltage stabilizer, it is high voltage withstanding to solve ether compound, and structural instability holds labile problem, further improves electricity
The high-tension cyclical stability of solution liquid.
3rd, the battery containing the lithium-ion battery electrolytes of the invention, can suppress metal ion in positive electrode dissolving,
Reduce cathode impedance, can increase substantially battery cyclical stability under high voltages, improve battery high temperature cyclic performance and
Low-temperature characteristics.
Specific embodiment
In order to be better understood from the present invention, the present invention is conducted further description with reference to specific embodiment.
The present invention provides a kind of lithium-ion battery electrolytes and the battery containing the electrolyte.
Embodiment 1
A kind of lithium-ion battery electrolytes, by electrolyte lithium salt, lipid solvent, difluorophosphate, ether compound and high voltage
Stabilizer is constituted, and dissolving cosolvent of the ether compound for difluorophosphate, difluorophosphate weight account for the 1% of solvent gross weight
More than, ether compound weight accounts for the 2% of solvent gross weight, and high voltage stabilizer accounts for the 0.6% of solvent gross weight, by above-mentioned each original
Material is sequentially added, and is stirred, and obtains final product lithium ion battery electrolyte (free acid of the present invention<15 ppm, moisture<
10 ppm), prepared electrolyte is used for contact angle to be tested and battery performance test, and test result is summarized in table 1.
Lipid solvent is ethylene carbonate.
Ether compound is tetrahydrofuran.The ratio of difluorophosphate and ether compound is 1:2.5.
High voltage stabilizer is acetonitrile.
Electrolyte lithium salt concentration in the electrolytic solution is 1.4mol/L.Difluorophosphate accounts for electrolyte solvent gross weight
3%.Ether compound accounts for the 2% of electrolyte solvent gross weight.High voltage stabilizer accounts for the 1% of electrolyte solvent gross weight.
A kind of battery containing the electrolyte, its making step are as follows（By weight percentage）：
1）Anode pole piece
1～4% Kynoar (PVDF) is dissolved in 1-Methyl-2-Pyrrolidone solution, by 90% LiCoO2
Above-mentioned solution mix homogeneously are added with 1% conductive agent white carbon black, the slurry being blended is coated on behind the two sides of aluminium foil, drying,
Anode pole piece is obtained after rolling.
2）Cathode pole piece
The CMC thickening agents of 1% SBR binding agents and 0.5% are dissolved in aqueous solution, 90% graphite is added into above-mentioned solution
And mix homogeneously, the slurry being blended is coated on behind the two sides of Copper Foil, after drying, rolling, cathode pole piece is obtained.
3）The preparation of lithium secondary battery
The anode pole piece of above-mentioned preparation, cathode pole piece and isolating membrane are made into 18650 battery cores with winding method, using 18650 steel
Shell is packed, and irrigates the electrolyte of above-mentioned preparation after battery core is inserted 18650 box hats, makes capacity for 3000 Jing after the techniques such as chemical conversion
The lithium secondary battery of mAh.
4）Battery performance test
Cycle performance is tested, and carries out charge and discharge cycles test, blanking voltage area to battery with the multiplying power of 0.5/0.5C discharge and recharges
Between be 3.0～4.45 V.High-temperature storage performance is tested, and the battery for finishing chemical conversion first is under normal temperature state with 0.5C charge and discharges
Electricity once, then with 0.5C will be battery fully charged after carry out High temperature storage, after battery is cooled down completely, by take out battery with
0.5C carries out discharge test.
Embodiment 2
A kind of lithium-ion battery electrolytes, by electrolyte lithium salt, lipid solvent, difluorophosphate, ether compound and high voltage
Stabilizer is constituted, and dissolving cosolvent of the ether compound for difluorophosphate, difluorophosphate weight account for the 1% of solvent gross weight
More than, ether compound weight accounts for the 8% of solvent gross weight, and high voltage stabilizer accounts for the 4% of solvent gross weight, by above-mentioned each raw material
Sequentially add, stir, obtain final product lithium ion battery electrolyte (free acid of the present invention<15 ppm, moisture< 10
Ppm), prepared electrolyte is used for contact angle test and battery performance test.
Lipid solvent is dimethyl carbonate.
Ether compound is 1,3- dioxolanes.The ratio of difluorophosphate and ether compound is 1:4.
High voltage stabilizer is isopropyl nitrile.
Electrolyte lithium salt concentration in the electrolytic solution is 1.6mol/L.Difluorophosphate accounts for electrolyte solvent gross weight
5%.Ether compound accounts for the 5% of electrolyte solvent gross weight.High voltage stabilizer accounts for the 2% of electrolyte solvent gross weight.
A kind of battery containing the electrolyte, its making step are as follows（By weight percentage）：
1）Anode pole piece
4% Kynoar (PVDF) is dissolved in 1-Methyl-2-Pyrrolidone solution, by 95% LiCoO2With
3% conductive agent white carbon black adds above-mentioned solution mix homogeneously, and the slurry being blended is coated on behind the two sides of aluminium foil, drying, rolling
Anode pole piece is obtained after pressure.
2）Cathode pole piece
The CMC thickening agents of 4% SBR binding agents and 1.5% are dissolved in aqueous solution, 95% graphite is added into above-mentioned solution simultaneously
Mix homogeneously, the slurry being blended is coated on behind the two sides of Copper Foil, obtains cathode pole piece after drying, rolling.
3）The preparation of lithium secondary battery
The anode pole piece of above-mentioned preparation, cathode pole piece and isolating membrane are made into 18650 battery cores with winding method, using 18650 steel
Shell is packed, and irrigates the electrolyte of above-mentioned preparation after battery core is inserted 18650 box hats, makes capacity for 3000 Jing after the techniques such as chemical conversion
The lithium secondary battery of mAh.
4）Battery performance test
Cycle performance is tested, and carries out charge and discharge cycles test, blanking voltage area to battery with the multiplying power of 0.5/0.5C discharge and recharges
Between be 3.0～4.45 V.High-temperature storage performance is tested, and the battery for finishing chemical conversion first is under normal temperature state with 0.5C charge and discharges
Electricity once, then with 0.5C will be battery fully charged after carry out High temperature storage, after battery is cooled down completely, by take out battery with
0.5C carries out discharge test.
Embodiment 3
A kind of lithium-ion battery electrolytes, by electrolyte lithium salt, lipid solvent, difluorophosphate, ether compound and high voltage
Stabilizer is constituted, and dissolving cosolvent of the ether compound for difluorophosphate, difluorophosphate weight account for the 1% of solvent gross weight
More than, ether compound weight accounts for the 6% of solvent gross weight, and high voltage stabilizer accounts for the 3% of solvent gross weight, by above-mentioned each raw material
Sequentially add, stir, obtain final product lithium ion battery electrolyte (free acid of the present invention<15 ppm, moisture< 10
Ppm), prepared electrolyte is used for contact angle test and battery performance test.
Lipid solvent is Allyl carbonate.
Ether compound is 2- methyltetrahydrofurans.The ratio of difluorophosphate and ether compound is 1:3.
High voltage stabilizer is propionitrile.
Electrolyte lithium salt concentration in the electrolytic solution is 1.5mol/L.Difluorophosphate accounts for electrolyte solvent gross weight
4%.Ether compound accounts for the 4% of electrolyte solvent gross weight.High voltage stabilizer accounts for the 1.5% of electrolyte solvent gross weight.
A kind of battery containing the electrolyte, its making step are as follows（By weight percentage）：
1）Anode pole piece
3% Kynoar (PVDF) is dissolved in 1-Methyl-2-Pyrrolidone solution, by 93% LiCoO2With
2% conductive agent white carbon black adds above-mentioned solution mix homogeneously, and the slurry being blended is coated on behind the two sides of aluminium foil, drying, rolling
Anode pole piece is obtained after pressure.
2）Cathode pole piece
The CMC thickening agents of 3% SBR binding agents and 1.0% are dissolved in aqueous solution, 93% graphite is added into above-mentioned solution simultaneously
Mix homogeneously, the slurry being blended is coated on behind the two sides of Copper Foil, obtains cathode pole piece after drying, rolling.
3）The preparation of lithium secondary battery
The anode pole piece of above-mentioned preparation, cathode pole piece and isolating membrane are made into 18650 battery cores with winding method, using 18650 steel
Shell is packed, and irrigates the electrolyte of above-mentioned preparation after battery core is inserted 18650 box hats, makes capacity for 3000 Jing after the techniques such as chemical conversion
The lithium secondary battery of mAh.
4）Battery performance test
Cycle performance is tested, and carries out charge and discharge cycles test, blanking voltage area to battery with the multiplying power of 0.5/0.5C discharge and recharges
Between be 3.0～4.45 V.High-temperature storage performance is tested, and the battery for finishing chemical conversion first is under normal temperature state with 0.5C charge and discharges
Electricity once, then with 0.5C will be battery fully charged after carry out High temperature storage, after battery is cooled down completely, by take out battery with
0.5C carries out discharge test.
1 test result of table is summarized
Above embodiments of the invention are described in detail, but the content have been only presently preferred embodiments of the present invention, it is impossible to
It is considered as the practical range for limiting the present invention.All impartial changes made according to the scope of the invention and improvement etc., still all should return
Belong within this patent covering scope.
Claims (10)
1. a kind of lithium-ion battery electrolytes, it is characterised in that：Which includes electrolyte lithium salt, lipid solvent, difluorophosphate, ether
Class compound and high voltage stabilizer, and electrolyte is hybridly prepared into by a certain percentage；The ether compound is difluorophosphoric acid
The dissolving cosolvent of lithium；
Wherein, difluorophosphate weight accounts for more than the 1% of solvent gross weight, ether compound weight account for solvent gross weight 1～
10%, high voltage stabilizer accounts for the 0.5～5% of solvent gross weight.
2. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The lipid solvent is ethylene
Alkene ester, Allyl carbonate, dimethyl carbonate, diethyl carbonate, Ethyl methyl carbonate, gamma-butyrolacton, methyl acetate, ethyl acetate,
One or more in propyl acetate, butyl acetate, ethyl propionate, propyl propionate, butyl propionate.
3. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The ether compound is tetrahydrochysene
Furan, 2- methyltetrahydrofurans, 1,3- dioxolanes, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, triethylene glycol two
One or more in methyl ether and TEG dimethyl ether.
4. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The difluorophosphate and ethers
The ratio of compound is 1:2～5.
5. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The high voltage stabilizer is second
Nitrile, propionitrile, isopropyl nitrile, succinonitrile, butyronitrile, adiponitrile, valeronitrile, glutaronitrile, certain herbaceous plants with big flowers dintrile, acrylonitrile, cyclohexyl nitrile, 1,2- hexamethylenes
One or more in base dintrile, phthalic nitrile.
6. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The electrolyte lithium salt is in electrolysis
Concentration in liquid is 1.4～1.6mol/L.
7. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The difluorophosphate accounts for electrolysis
The 2～6% of liquid solvent gross weight.
8. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The ether compound accounts for electrolysis
The 1%～5% of liquid solvent gross weight.
9. a kind of lithium-ion battery electrolytes according to claim 1, it is characterised in that：The high voltage stabilizer accounts for electricity
The 1%～2% of solution liquid solvent gross weight.
10. a kind of battery containing the electrolyte according to claim 1, its making step are as follows（With percentage by weight
Meter）：
1）Anode pole piece
1～4% Kynoar (PVDF) is dissolved in 1-Methyl-2-Pyrrolidone solution, by 90～95%
LiCoO2Above-mentioned solution mix homogeneously are added with 1～3% conductive agent white carbon black, the slurry being blended is coated on into the two sides of aluminium foil
Afterwards, drying, rolling after obtain anode pole piece；
2）Cathode pole piece
The CMC thickening agents of 1～4% SBR binding agents and 0.5～1.5% are dissolved in aqueous solution, by 90～95% graphite
Above-mentioned solution mix homogeneously is added, the slurry being blended is coated on behind the two sides of Copper Foil, after drying, rolling, obtain negative pole pole
Piece；
3）The preparation of lithium ion battery
By above-mentioned steps 1）、2）The anode pole piece of preparation, cathode pole piece and isolating membrane make battery core with winding method, using box hat
Packaging, battery core is inserted the electrolyte for irrigating above-mentioned preparation after box hat, makes lithium secondary battery and test Jing after the techniques such as chemical conversion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611262283.2A CN106532123A (en) | 2016-12-30 | 2016-12-30 | Electrolyte for lithium-ion battery and battery containing electrolyte |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611262283.2A CN106532123A (en) | 2016-12-30 | 2016-12-30 | Electrolyte for lithium-ion battery and battery containing electrolyte |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106532123A true CN106532123A (en) | 2017-03-22 |
Family
ID=58336248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611262283.2A Pending CN106532123A (en) | 2016-12-30 | 2016-12-30 | Electrolyte for lithium-ion battery and battery containing electrolyte |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106532123A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109768220A (en) * | 2018-12-28 | 2019-05-17 | 东莞凯德新能源有限公司 | A method of reducing lithium ion battery self discharge |
| CN113015776A (en) * | 2018-11-06 | 2021-06-22 | 巴斯夫欧洲公司 | Novel heat transfer liquid for cooling lithium storage batteries |
| CN117154224A (en) * | 2023-09-15 | 2023-12-01 | 常州千沐新能源有限公司 | Deep eutectic electrolyte additive capable of solubilizing lithium salt, electrolyte and lithium battery |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008069267A1 (en) * | 2006-12-06 | 2008-06-12 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte solution and nonaqueous electrolyte secondary battery |
| CN101208266A (en) * | 2005-06-20 | 2008-06-25 | 三菱化学株式会社 | Method for producing difluorophosphate, non-aqueous electrolyte for secondary cell and non-aqueous electrolyte secondary cell |
| CN105720303A (en) * | 2014-12-05 | 2016-06-29 | 浙江蓝天环保高科技股份有限公司 | Fluoro-carboxylic ester contained electrolyte for high-voltage lithium ion battery |
| CN106159328A (en) * | 2016-08-31 | 2016-11-23 | 湖北诺邦科技股份有限公司 | A kind of lithium ion battery high-voltage electrolyte |
| CN106252723A (en) * | 2016-08-29 | 2016-12-21 | 宁德市凯欣电池材料有限公司 | Produce the new method of lithium-ion battery electrolytes |
-
2016
- 2016-12-30 CN CN201611262283.2A patent/CN106532123A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101208266A (en) * | 2005-06-20 | 2008-06-25 | 三菱化学株式会社 | Method for producing difluorophosphate, non-aqueous electrolyte for secondary cell and non-aqueous electrolyte secondary cell |
| WO2008069267A1 (en) * | 2006-12-06 | 2008-06-12 | Mitsubishi Chemical Corporation | Nonaqueous electrolyte solution and nonaqueous electrolyte secondary battery |
| CN101548425A (en) * | 2006-12-06 | 2009-09-30 | 三菱化学株式会社 | Nonaqueous electrolyte solution and nonaqueous electrolyte secondary battery |
| CN105720303A (en) * | 2014-12-05 | 2016-06-29 | 浙江蓝天环保高科技股份有限公司 | Fluoro-carboxylic ester contained electrolyte for high-voltage lithium ion battery |
| CN106252723A (en) * | 2016-08-29 | 2016-12-21 | 宁德市凯欣电池材料有限公司 | Produce the new method of lithium-ion battery electrolytes |
| CN106159328A (en) * | 2016-08-31 | 2016-11-23 | 湖北诺邦科技股份有限公司 | A kind of lithium ion battery high-voltage electrolyte |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113015776A (en) * | 2018-11-06 | 2021-06-22 | 巴斯夫欧洲公司 | Novel heat transfer liquid for cooling lithium storage batteries |
| CN109768220A (en) * | 2018-12-28 | 2019-05-17 | 东莞凯德新能源有限公司 | A method of reducing lithium ion battery self discharge |
| CN117154224A (en) * | 2023-09-15 | 2023-12-01 | 常州千沐新能源有限公司 | Deep eutectic electrolyte additive capable of solubilizing lithium salt, electrolyte and lithium battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103618111B (en) | A kind of il electrolyte and the serondary lithium battery containing this electrolyte | |
| CN104269576B (en) | A kind of electrolyte and the lithium ion battery using the electrolyte | |
| CN102569885B (en) | Lithium ion battery nonaqueous electrolytic solution and lithium rechargeable battery | |
| CN106450438A (en) | Lithium-ion battery electrolyte and lithium ion battery with the same | |
| CN104364191B (en) | LiPF6Stabilization method, the non-aqueous secondary batteries electrolyte of excellent heat stability and the non-aqueous secondary batteries of excellent heat stability | |
| CN105428701A (en) | Electrolyte and lithium ion battery comprising same | |
| CN104103852A (en) | Nonaqueous electrolyte of high-voltage lithium battery | |
| CN105845984A (en) | Lithium ion battery electrolyte and lithium ion battery using same | |
| CN105428719A (en) | High-voltage wide-temperature lithium ion battery electrolyte, preparation method therefor and applications | |
| CN107534185A (en) | Nonaqueous electrolyte for battery and lithium secondary battery | |
| CN103094616A (en) | Electrolyte additive, high-voltage electrolyte and lithium ion battery containing electrolyte additive | |
| CN103560270B (en) | A kind of electrolyte for lithium ion battery | |
| CN106159328A (en) | A kind of lithium ion battery high-voltage electrolyte | |
| CN105390742A (en) | High-voltage lithium-ion battery electrolyte as well as preparation method and application thereof | |
| JP2014531415A (en) | Bisquaternary ammonium salt ionic liquid having two centers, process for its preparation and use | |
| CN102593513A (en) | Lithium ion secondary battery and electrolyte thereof | |
| CN105789684A (en) | Lithium ion secondary battery and electrolyte thereof | |
| CN108682889A (en) | A kind of lithium ion battery high-voltage electrolyte and its application | |
| CN103928707A (en) | High voltage lithium ion battery functional electrolyte and preparation method and application | |
| CN108258297A (en) | Electrolyte and lithium ion battery | |
| CN108666620A (en) | A kind of nonaqueous electrolytic solution of high-voltage lithium ion batteries | |
| CN107293776A (en) | Electrolyte and lithium ion battery | |
| CN104425841B (en) | A kind of non-aqueous organic high-voltage electrolyte additive, non-aqueous organic high-voltage electrolyte and lithium rechargeable battery | |
| CN103545551A (en) | Electrolyte applicable to lithium titanate battery | |
| CN106532123A (en) | Electrolyte for lithium-ion battery and battery containing electrolyte |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170322 |
|
| RJ01 | Rejection of invention patent application after publication |