CN106848398A - A kind of electrolyte for lithium ion battery - Google Patents
A kind of electrolyte for lithium ion battery Download PDFInfo
- Publication number
- CN106848398A CN106848398A CN201710083275.XA CN201710083275A CN106848398A CN 106848398 A CN106848398 A CN 106848398A CN 201710083275 A CN201710083275 A CN 201710083275A CN 106848398 A CN106848398 A CN 106848398A
- Authority
- CN
- China
- Prior art keywords
- electrolyte
- lithium
- additive
- formula
- carbonate
- 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
- H01M10/056—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)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of electrolyte for lithium ion battery, including：Lithium salts, carbonats compound, ionic liquid and additive, solute and solvent that the present invention passes through preferred electrolyte, the mode of the proportioning of each component and addition ionic liquid and additive in optimization electrolyte, the parameter of the aspects such as viscosity, freezing point, boiling point, heat endurance and chemical stability from control adjustment electrolyte system keeps micro change with the change of the use environment of electrolyte, can effectively improve electrolyte to the anode pole piece and cathode pole piece of lithium titanate lithium ion battery and the wellability and compatibility of barrier film；In addition, the ionic liquid in electrolyte also produces cooperative effect between additive, the stability and feature of electrolyte can be effectively improved, so as to improve the high rate capability of lithium titanate lithium ion battery, solve the problems, such as battery flatulence after repeatedly circulation.
Description
Technical field
The present invention relates to technical field of lithium ion, more particularly to a kind of electrolyte for lithium ion battery.
Background technology
Lithium ion battery has that operating voltage high, memory-less effect, self-discharge rate are small, it is big with energy density to have extended cycle life
The advantages of, it is applied to the fields such as portable electric appts, new-energy automobile, energy storage and startup power supply.Applied in association area
While lithium ion battery, to lithium ion battery in various aspects of performance such as energy density, cycle performance, security performance and stability
Requirement also improve therewith, lithium ion battery is mainly made up of anode pole piece, cathode pole piece, barrier film, electrolyte and housing, its
In, electrolyte is generally made up of lithium salts and organic solvent, electrolyte as lithium ion battery important component, its performance pair
The raising of lithium ion battery various aspects of performance has directly influence.
Lithium titanate (Li4Ti5O12) it is a kind of composite oxides being made up of lithium metal and low potential transition metals Ti, as
The negative material of lithium ion battery, is important lithium ion battery negative material the advantages of stability is high with having extended cycle life
One of material.The manufacture craft of lithium titanate lithium ion battery includes slurrying, film, four steps of assembling and chemical conversion, wherein, to titanium
When sour lithium ion battery carries out installation step, overlap and roll up according to the order of anode pole piece, barrier film, cathode pole piece and barrier film
Around rear, it is placed in battery container, injection electrolyte in most backward housing, anode pole piece and negative pole of the wait electrolyte to battery
Pole piece carries out follow-up step after carrying out fully infiltration.
However, because the electrolyte of lithium titanate lithium ion battery is steady in viscosity, freezing point, boiling point, heat endurance and chemistry
The parameter of the aspect such as qualitative cannot cause between electrolyte and anode pole piece and cathode pole piece with the change adjust automatically of environment
Wellability and compatibility it is poor, and electrolyte and negative material can not in a short time form effective and high-quality SEI
(solid electrolyte interphase, solid electrolyte interface) film, and then cause electrolyte to anode pole piece and bear
The time of penetration of pole pole piece is long；Simultaneously as the feature and stability of electrolyte are relatively low, cause lithium titanate lithium ion battery
High rate capability is low, and over numerous cycles, the flatulence problem of battery is serious.
The content of the invention
The invention provides a kind of electrolyte for lithium ion battery, with solve because electrolyte viscosity, freezing point, boiling point,
The parameter of the aspect such as heat endurance and chemical stability cannot cause electrolyte and positive pole pole with the change adjust automatically of environment
Wellability and compatibility between piece and cathode pole piece is poor, and electrolyte can not be formed with a short time with negative material
Effect and high-quality SEI films, and then cause electrolyte long to the time of penetration of anode pole piece and cathode pole piece；Simultaneously as electric
The feature and stability for solving liquid are relatively low, cause the high rate capability of lithium titanate lithium ion battery low, and over numerous cycles, electricity
The serious problem of the flatulence problem in pond.
The invention provides a kind of electrolyte for lithium cells, the lithium ion battery with lithium titanate as negative material is applied to,
The electrolyte includes：By weight percentage,
The content of the lithium salts is 5.0%-10.0%；
The content of the carbonats compound is 40.0%-70.0%；
The content of the ionic liquid is 15.0%-25.0%, and the anion of the ionic liquid has shown in formula ()
Chemical constitution,
The cation of the ionic liquid has shown in formula (two), formula (three), formula (four), formula (five), formula (six), formula (seven)
Chemical constitution in one or more,
Wherein, R1-R4And R18-R21Selection carbon number independently is the alkyl or substitution alkyl of 1-8；
R5、R6、R12、R13、R26And R31Selection carbon number independently is the alkyl of 1-6；
R7-R11、R14-R17、R22-R25And R27-R30Selection number of hydrogen atoms independently, halogen atom number or carbon number
It is the alkyl or substitution alkyl of 1-6；
The content of the additive is 5.0%-10.0%, and the additive includes film for additive, stability additive
With low temperature additive.
Preferably, the lithium salts includes lithium hexafluoro phosphate, LiBF4, lithium perchlorate, trifluoromethyl sulfonic acid lithium, chlorination
One or more in lithium, lithium iodide, lithium aluminate, hexafluoroarsenate lithium, fluoro sulfimide lithium.
Preferably, the carbonats compound includes ethylene carbonate, propene carbonate, dimethyl carbonate, carbonic acid two
In ethyl ester, methyl ethyl carbonate, dibutyl carbonate, methyl propyl carbonate, ethyl propyl carbonic acid ester, ethyl butyl carbonate, fluorine-containing carbonic ester one
Plant or various.
Preferably, the fluorine-containing carbonic ester has formula (eight) or the chemical constitution shown in formula (nine),
Wherein, Rh is H or hydrocarbon chain group；Rf is H (CF2CF2)n1CH2-、F(CF2CF2)n2CH2CH2- or
CF3CF2CF2O(CF(CF3)CF2O)n3CF(CF3)CH2-, n1 and n2 is positive integer, and n3 is 0 or positive integer.
Preferably, the cation of the ionic liquid
With the chemical constitution shown in formula (two), wherein, R1It is CH3CHFCH2-, R2It is CH3CH2-, R3It is BrCH2CH2-,
R4It is CH3CH2CH2CH2CH2-；Or
With the chemical constitution shown in formula (four), wherein, R12It is CH3CH2-, R13It is CH3CH2-, R14It is CH3BrCH-, R15
It is CH3CH2CH2CH2CH2-, R16It is BrCH2CH2-, R17It is CH3CH2CH2CH2CH2CH2-。
Preferably, the content of the film for additive is 1.0%-3.0%；
The content of the stability additive is 2.0%-4.0%；
The content of the low temperature additive is 2.0%-4.0%.
Preferably, the film for additive includes the one kind or many in vinylene carbonate, vinyl vinylene carbonate
Kind；
The stability additive includes HMDS, seven methyl disilazanes, triphenyl phosphite, phosphorous acid
One or more in trimethyl；
The low temperature additive includes fluorinated ethylene carbonate, difluorinated ethylene carbonate, N, N- dimethyl trifluoroacetyls
One or more in amine.
A kind of electrolyte for lithium cells that the present invention is provided can include the following benefits：In the present invention, by preferred
The solute and solvent of electrolyte, the mode of the proportioning of each component and addition ionic liquid and additive in optimization electrolyte,
The parameter of the aspects such as viscosity, freezing point, boiling point, heat endurance and chemical stability from control adjustment electrolyte system is with electrolysis
The change of the use environment of liquid and keep micro change, positive pole pole of the electrolyte to lithium titanate lithium ion battery can be effectively improved
The wellability and compatibility of piece and cathode pole piece and barrier film；In addition, the ionic liquid in electrolyte is produced also between additive
Raw cooperative effect, can effectively improve the stability and feature of electrolyte, so as to improve the high power of lithium titanate lithium ion battery
Rate performance, solves the problems, such as battery flatulence after repeatedly circulation.
It should be appreciated that the general description of the above and detailed description hereinafter are only exemplary and explanatory, not
Can the limitation present invention.
Brief description of the drawings
In order to illustrate more clearly of technical scheme, letter will be made to the accompanying drawing to be used needed for embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without having to pay creative labor,
Other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is that rated capacity prepared by the electrolyte for using embodiment and comparative example to prepare is 25 DEG C of the soft-package battery of 10AH
1C circulates the test chart of 6000 times；
Fig. 2 is that rated capacity prepared by the electrolyte for using embodiment and comparative example to prepare is 25 DEG C of the soft-package battery of 10AH
3C circulates the test chart of 4200 times；
Fig. 3 is that rated capacity prepared by the electrolyte for using embodiment and comparative example to prepare is 25 DEG C of the soft-package battery of 10AH
5C circulates the test chart of 2000 times.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, but
It should be appreciated that these descriptions are simply to further illustrate the features and advantages of the present invention, rather than to the claims in the present invention
Limitation.
The embodiment of the invention discloses a kind of electrolyte for lithium ion battery, the lithium with lithium titanate as negative material is applied to
Ion battery, including：Lithium salts, carbonats compound, ionic liquid and additive, wherein, by weight percentage, lithium salts
Content is 5.0%-10.0%, and the content of carbonats compound is 40.0%-70.0%, and the content of ionic liquid is
15.0%-25.0%, the content of additive is 5.0%-10.0%.
In a kind of electrolyte for lithium ion battery disclosed in the embodiment of the present invention, lithium salts is preferably lithium hexafluoro phosphate, tetrafluoro
Lithium borate, lithium perchlorate, trifluoromethyl sulfonic acid lithium, lithium chloride, lithium iodide, lithium aluminate, hexafluoroarsenate lithium, fluoro sulfimide lithium
In one or more, more preferably lithium hexafluoro phosphate.
Carbonats compound is preferably ethylene carbonate, propene carbonate, dimethyl carbonate, diethyl carbonate, carbonic acid
One or more in methyl ethyl ester, dibutyl carbonate, methyl propyl carbonate, ethyl propyl carbonic acid ester, ethyl butyl carbonate, fluorine-containing carbonic ester,
When carbonats compound is various mixing, the present invention has no particular limits to the ratio that it mixes.The embodiment of the present invention
In carbonats compound be more preferably the mixing of ethylene carbonate, propene carbonate, dibutyl carbonate and ethyl butyl carbonate
The mixture of thing or fluorine-containing carbonic ester, propene carbonate, dibutyl carbonate, ethylene carbonate and ethyl butyl carbonate, wherein, it is fluorine-containing
Carbonic ester preferably has the chemical constitution shown in formula (eight),
Wherein, Rf is respectively H (CF2CF2)3CH2- and F (CF2CF2)5CH2CH2-。
Ionic liquid is with the addition of in a kind of electrolyte for lithium ion battery disclosed by the invention, contributes to regulation electrolyte each
The parameter of aspect, improves electrolyte and anode pole piece and the wellability and compatibility of cathode pole piece, the anion tool of ionic liquid
There is the structure shown in formula (),
The cation of ionic liquid has the change shown in formula (two), formula (three), formula (four), formula (five), formula (six), formula (seven)
One or more in structure is learned,
Wherein, R1-R4And R18-R21Selection carbon number independently is the alkyl or substitution alkyl of 1-8；
R5、R6、R12、R13、R26And R31Selection carbon number independently is the alkyl of 1-6；
R7-R11、R14-R17、R22-R25And R27-R30Selection number of hydrogen atoms independently, halogen atom number or carbon number
It is the alkyl or substitution alkyl of 1-6.
According to the present invention, ionic liquid is preferably anion, and there is formula () and cation to have the chemistry shown in formula (two)
Structure,
Wherein, R1It is CH3CHFCH2-, R2It is CH3CH2-, R3It is BrCH2CH2-, R4It is CH3CH2CH2CH2CH2-；
Or there is anion formula () and cation to have the chemical constitution shown in formula (four),
Wherein, R12It is CH3CH2-, R13It is CH3CH2-, R14It is CH3BrCH-, R15It is CH3CH2CH2CH2CH2-, R16For
BrCH2CH2-, R17It is CH3CH2CH2CH2CH2CH2-。
Additionally, also added additive in a kind of lithium ion electrolyte disclosed by the invention, additive adds including film forming
Plus agent, stability additive and low temperature additive, wherein, by weight percentage, the content of film for additive is preferably
1.0%-3.0%, film for additive is preferably one or more in vinylene carbonate, vinyl vinylene carbonate, has
Help make electrolyte form high-quality SEI films in a short time with negative material, shorten time of penetration；
The content of stability additive is preferably 2.0%-4.0%, stability additive be preferably HMDS,
One or more in seven methyl disilazanes, triphenyl phosphite, Trimethyl phosphite, help to eliminate or reduce electrolyte
In dissociate moisture and hydrofluoric acid, so as to improve the stability and cycle life of lithium ion battery；
The content of low temperature additive is preferably 2.0%-4.0%, low temperature additive preferably comprise fluorinated ethylene carbonate,
Difluorinated ethylene carbonate, N, one or more in N- dimethyl trifluoroacetamides, are favorably improved electronic conductivity, reduce
Solvent viscosity.
Meanwhile, in the present invention, ionic liquid produces cooperative effect, i.e. various additives quick with ionic liquid with additive
Dissolve each other to form the complex compound of stabilization, be easy to produce solvent to be turned into lithium ion in lithium titanate lithium ion battery charge and discharge process
With the solvation efficiency and migration rate of lithium ion can be significantly improved, so as to effectively improve the stability and function of electrolyte
Property, and then improve lithium titanate lithium ion battery cyclical stability and high rate capability.
A kind of lithium ion electrolyte provided in an embodiment of the present invention, is applied to the lithium ion with lithium titanate as negative material
Battery, including：Lithium salts, carbonats compound, ionic liquid and additive, wherein, by the solute of preferred electrolyte and molten
Agent, the mode of the proportioning of each component and addition ionic liquid and additive in optimization electrolyte, from control adjustment electrolyte
The parameter of the aspects such as the viscosity of system, freezing point, boiling point, heat endurance and chemical stability with the use environment of electrolyte change
Change and keep micro change, electrolyte can be effectively improved to the anode pole piece and cathode pole piece of lithium titanate lithium ion battery and
The wellability and compatibility of barrier film；In addition, the ionic liquid in electrolyte also produces cooperative effect, Neng Gouyou between additive
Effect improves the stability and feature of electrolyte, so as to improve the high rate capability of lithium titanate lithium ion battery, solution is repeatedly followed
The problem of battery flatulence after ring.
For a further understanding of the present invention, the electrolyte that the present invention is provided is described in detail with reference to embodiment,
Protection scope of the present invention is not limited by the following examples.
Embodiment 1
By weight percentage, 5.0% propene carbonate, 10.0% dibutyl carbonate, 20.0% ethylene carbonate are taken respectively
Ester, 20.0% ethyl butyl carbonate and 25.0% ionic liquid, stir above-mentioned solution movement in glove box of the humidity less than 8ppm
Mix well mixed, solution temperature is controlled at 25 ± 2 DEG C, is configured to the solvent of electrolyte；To adding 10.0% hexafluoro in the solvent
Lithium phosphate, after it is completely dissolved, continues to 2.0% 7 methyl disilazane of addition, 4.0% vinyl carbonic acid Asia second in solvent
Alkene ester and 4.0%N, N- dimethyl trifluoroacetamide are simultaneously uniformly mixed, and the metatitanic acid of the present embodiment is obtained after standing 24 hours
The electrolyte of lithium ion battery.
The anion of the present embodiment intermediate ion liquid is
Cation is
Wherein, R12It is CH3CH2-, R13It is CH3CH2-, R14It is CH3BrCH-, R15For
CH3CH2CH2CH2CH2-, R16It is BrCH2CH2-, R17It is CH3CH2CH2CH2CH2CH2-。
Embodiment 2
By weight percentage, 10.0% fluorine-containing carbonic ester, 10.0% propene carbonate, the fourth of 10.0% carbonic acid two are taken respectively
Ester, 10.0% ethylene carbonate, 20.0% ethyl butyl carbonate and 20.0% ionic liquid, in glove box of the humidity less than 8ppm
Above-mentioned solution movement is uniformly mixed, solution temperature is controlled at 25 ± 2 DEG C, is configured to the solvent of electrolyte；To the solvent
It is middle addition 10.0% lithium hexafluoro phosphate, after it is completely dissolved, continue in solvent add 2.0% 7 methyl disilazane,
4.0% vinyl vinylene carbonate and 4.0%N, N- dimethyl trifluoroacetamide are simultaneously uniformly mixed, after standing 24 hours
Obtain the electrolyte of the lithium titanate lithium ion battery of the present embodiment.
The anion of the present embodiment intermediate ion liquid is
Cation is
Wherein, R1It is CH3CHFCH2-, R2It is CH3CH2-, R3It is BrCH2CH2-, R4For
CH3CH2CH2CH2CH2-；
The chemical constitution of fluorine-containing carbonic ester is in the present embodiment
Wherein, Rf is respectively H (CF2CF2)3CH2- and F (CF2CF2)5CH2CH2-。
Comparative example
By weight percentage, take respectively and take 10.0% propene carbonate, 15.0% dibutyl carbonate, 25.0% carbon respectively
Vinyl acetate and 30.0% ethyl butyl carbonate, it is in glove box of the humidity less than 8ppm that the stirring mixing of above-mentioned solution movement is equal
Even, solution temperature is controlled at 25 ± 2 DEG C, is configured to the solvent of electrolyte；To 10.0% lithium hexafluoro phosphate is added in the solvent, treat
After it is completely dissolved, continue in solvent add 2.0% 7 methyl disilazane, 4.0% vinyl vinylene carbonate and
4.0%N, N- dimethyl trifluoroacetamide are simultaneously uniformly mixed, obtained after standing 24 hours the lithium titanate lithium of this comparative example from
The electrolyte of sub- battery.
The electrolyte for lithium ion battery that above-described embodiment 1 and embodiment 2 and comparative example are prepared is injected separately into positive pole
Be LiFePO4, negative pole is lithium titanate, barrier film in the Soft Roll rectangular cell of dry method simple tension coating material, battery it is specified
Capacity is 10.0AH, 1.0V-2.65V respectively according to the standard of GB/T31484-2015 and GB/T31485-2015 with 1C, 3C,
The multiplying power of 5C is tested battery, and test result is shown in Table 1.
The lithium titanate lithium ion battery that table 1 is prepared using the electrolyte that embodiment 1, embodiment 2 and comparative example are prepared
Test result
Can be calculated from the data in table 1, the titanium that the electrolyte prepared using present invention implementation 1 and embodiment 2 is made
Capability retention is respectively 80.5% He after circulating 6000 times according to 1C discharge and recharges system under the conditions of 25 DEG C of sour lithium ion battery
83.5%；Capability retention is respectively 80.0% and 82.3% after circulating 4200 times according to 3C discharge and recharges system under the conditions of 25 DEG C；
Capability retention is respectively 80.1% and 81.2% after circulating 2000 times according to 5C discharge and recharges system under the conditions of 25 DEG C.
And according to 1C discharge and recharge systems under the conditions of 25 DEG C of the lithium titanate lithium ion battery that the electrolyte that comparative example is prepared is made
Capability retention is 52.0% after circulating 6000 times；Capacity keeps after circulating 4200 times according to 3C discharge and recharges system under the conditions of 25 DEG C
Rate is 48.0%；Capability retention is 36.0% after circulating 2000 times according to 5C discharge and recharges system under the conditions of 25 DEG C.
It is visible by contrast, the lithium titanate lithium ion battery that the electrolyte prepared using present invention implementation 1 and embodiment 2 is made
By still there is capability retention higher after the circulation of multiple high power charging-discharging system under the conditions of normal temperature environment, additionally, adopting
The electrolyte prepared with Example 1 and Example 2 of the present invention to battery pole piece to shelve time of penetration also big compared to comparative example
Width shortens.
Fig. 1, Fig. 2 and Fig. 3 are respectively that rated capacity prepared by the electrolyte for using embodiment and comparative example to prepare is 10AH
25 DEG C of 1C of soft-package battery test charts for circulating 6000 times, the specified appearance for preparing of the electrolyte prepared using embodiment and comparative example
Measure and circulate the test chart of 4200 times and using embodiment and the electrolyte system of comparative example preparation for 25 DEG C of 3C of soft-package battery of 10AH
Standby rated capacity circulates the test chart of 2000 times for 25 DEG C of 5C of soft-package battery of 10AH.Can be clear from Fig. 1, Fig. 2 and Fig. 3
Find out to Chu, the lithium titanate lithium ion battery that the electrolyte prepared using Example 1 and Example 2 of the present invention is made is through repeatedly following
Battery capacity after ring is all higher than comparative example, and its cycle performance is superior to comparative example.
Invention described above implementation method is not intended to limit the scope of the present invention..
Claims (7)
1. a kind of electrolyte for lithium ion battery, it is characterised in that including：Lithium salts, carbonats compound, ionic liquid and add
Plus agent, wherein, by weight percentage,
The content of the lithium salts is 5.0%-10.0%；
The content of the carbonats compound is 40.0%-70.0%；
The content of the ionic liquid is 15.0%-25.0%, and the anion of the ionic liquid has the change shown in formula ()
Learn structure,
The cation of the ionic liquid has the change shown in formula (two), formula (three), formula (four), formula (five), formula (six), formula (seven)
One or more in structure is learned,
Wherein, R1-R4And R18-R21Selection carbon number independently is the alkyl or substitution alkyl of 1-8；
R5、R6、R12、R13、R26And R31Selection carbon number independently is the alkyl of 1-6；
R7-R11、R14-R17、R22-R25And R27-R30Selection number of hydrogen atoms independently, halogen atom number or carbon number are 1-
6 alkyl or substitution alkyl；
The content of the additive is 5.0%-10.0%, and the additive includes film for additive, stability additive and low
Warm additive.
2. electrolyte as claimed in claim 1, it is characterised in that the lithium salts includes lithium hexafluoro phosphate, LiBF4, height
One kind in lithium chlorate, trifluoromethyl sulfonic acid lithium, lithium chloride, lithium iodide, lithium aluminate, hexafluoroarsenate lithium, fluoro sulfimide lithium
Or it is various.
3. electrolyte as claimed in claim 1, it is characterised in that the carbonats compound includes ethylene carbonate, carbon
Acid propylene ester, dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate, dibutyl carbonate, methyl propyl carbonate, ethyl propyl carbonic acid ester, carbon
One or more in sour second butyl ester, fluorine-containing carbonic ester.
4. electrolyte as claimed in claim 3, it is characterised in that the fluorine-containing carbonic ester has shown in formula (eight) or formula (nine)
Chemical constitution,
Wherein, Rh is H or hydrocarbon chain group；Rf is H (CF2CF2)n1CH2-、F(CF2CF2)n2CH2CH2- or
CF3CF2CF2O(CF(CF3)CF2O)n3CF(CF3)CH2-, n1 and n2 is positive integer, and n3 is 0 or positive integer.
5. electrolyte as claimed in claim 1, it is characterised in that the cation of the ionic liquid
With the chemical constitution shown in formula (two), wherein, R1It is CH3CHFCH2-, R2It is CH3CH2-, R3It is BrCH2CH2-, R4For
CH3CH2CH2CH2CH2-；Or
With the chemical constitution shown in formula (four), wherein, R12It is CH3CH2-, R13It is CH3CH2-, R14It is CH3BrCH-, R15For
CH3CH2CH2CH2CH2-, R16It is BrCH2CH2-, R17It is CH3CH2CH2CH2CH2CH2-。
6. electrolyte as claimed in claim 1, it is characterised in that
The content of the film for additive is 1.0%-3.0%；
The content of the stability additive is 2.0%-4.0%；
The content of the high temperature additive is 2.0%-4.0%.
7. electrolyte as claimed in claim 1, it is characterised in that
The film for additive includes one or more in vinylene carbonate, vinyl vinylene carbonate；
The stability additive includes HMDS, seven methyl disilazanes, triphenyl phosphite, phosphorous acid front three
One or more in ester；
The low temperature additive includes fluorinated ethylene carbonate, difluorinated ethylene carbonate, N, in N- dimethyl trifluoroacetamides
One or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083275.XA CN106848398A (en) | 2017-02-16 | 2017-02-16 | A kind of electrolyte for lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710083275.XA CN106848398A (en) | 2017-02-16 | 2017-02-16 | A kind of electrolyte for lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106848398A true CN106848398A (en) | 2017-06-13 |
Family
ID=59127504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710083275.XA Pending CN106848398A (en) | 2017-02-16 | 2017-02-16 | A kind of electrolyte for lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106848398A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364764A (en) * | 2019-07-23 | 2019-10-22 | 浙江大学 | A kind of electrolyte and preparation method thereof for lithium ion battery |
| CN113903991A (en) * | 2021-11-12 | 2022-01-07 | 湖州昆仑亿恩科电池材料有限公司 | Non-aqueous electrolyte of lithium ion battery and application |
| CN114171796A (en) * | 2021-11-22 | 2022-03-11 | 中国电子科技集团公司第十八研究所 | Electrolyte, application method of electrolyte in lithium ion battery and lithium ion battery |
| CN116014238A (en) * | 2023-02-16 | 2023-04-25 | 吉林省翰驰科技有限公司 | Semi-solid electrolyte, synthesis method and application thereof, and semi-solid lithium battery |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417500A (en) * | 2011-09-02 | 2012-04-18 | 湖南有色郴州氟化学有限公司 | Fluorine-containing carbonate solvent, preparation method thereof and lithium ion battery electrolyte |
| CN102593517A (en) * | 2012-04-09 | 2012-07-18 | 山东鸿正电池材料科技有限公司 | Non-aqueous electrolyte for lithium iron phosphate battery |
| CN103641751A (en) * | 2011-05-20 | 2014-03-19 | 华中科技大学 | Alkali metal salts of binary or ternary fluorine-containing sulfimide and ionic liquid and applications thereof |
| CN103996874A (en) * | 2014-05-20 | 2014-08-20 | 珠海市赛纬电子材料有限公司 | Nonaqueous electrolyte of high-temperature safety lithium ion battery |
| CN105378871A (en) * | 2013-03-15 | 2016-03-02 | 伊赛欧尼克公司 | Methods of enhancing electrochemical double layer capacitor (EDLC) performance and EDLC devices formed therefrom |
| CN106328926A (en) * | 2016-10-18 | 2017-01-11 | 湖南锂顺能源科技有限公司 | High-security long-life ternary material battery |
-
2017
- 2017-02-16 CN CN201710083275.XA patent/CN106848398A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103641751A (en) * | 2011-05-20 | 2014-03-19 | 华中科技大学 | Alkali metal salts of binary or ternary fluorine-containing sulfimide and ionic liquid and applications thereof |
| CN102417500A (en) * | 2011-09-02 | 2012-04-18 | 湖南有色郴州氟化学有限公司 | Fluorine-containing carbonate solvent, preparation method thereof and lithium ion battery electrolyte |
| CN102593517A (en) * | 2012-04-09 | 2012-07-18 | 山东鸿正电池材料科技有限公司 | Non-aqueous electrolyte for lithium iron phosphate battery |
| CN105378871A (en) * | 2013-03-15 | 2016-03-02 | 伊赛欧尼克公司 | Methods of enhancing electrochemical double layer capacitor (EDLC) performance and EDLC devices formed therefrom |
| CN103996874A (en) * | 2014-05-20 | 2014-08-20 | 珠海市赛纬电子材料有限公司 | Nonaqueous electrolyte of high-temperature safety lithium ion battery |
| CN106328926A (en) * | 2016-10-18 | 2017-01-11 | 湖南锂顺能源科技有限公司 | High-security long-life ternary material battery |
Non-Patent Citations (1)
| Title |
|---|
| 中国汽车技术研究中心: "《节能与新能源汽车年鉴2012》", 31 December 2012, 中国经济出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110364764A (en) * | 2019-07-23 | 2019-10-22 | 浙江大学 | A kind of electrolyte and preparation method thereof for lithium ion battery |
| CN113903991A (en) * | 2021-11-12 | 2022-01-07 | 湖州昆仑亿恩科电池材料有限公司 | Non-aqueous electrolyte of lithium ion battery and application |
| CN114171796A (en) * | 2021-11-22 | 2022-03-11 | 中国电子科技集团公司第十八研究所 | Electrolyte, application method of electrolyte in lithium ion battery and lithium ion battery |
| CN116014238A (en) * | 2023-02-16 | 2023-04-25 | 吉林省翰驰科技有限公司 | Semi-solid electrolyte, synthesis method and application thereof, and semi-solid lithium battery |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103219544B (en) | A kind of low-temperature electrolyte for ternary power lithium ion battery and preparation method | |
| CN103825049B (en) | High-temperature-resistant electrolyte for lithium ion battery | |
| CN102064343B (en) | Novel lithium ion battery electrolyte | |
| CN103996874B (en) | High temperature safety non-aqueous electrolyte for lithium ion cell | |
| CN106848398A (en) | A kind of electrolyte for lithium ion battery | |
| CN106252721A (en) | A kind of lithium ion power battery electrolyte of high stable | |
| CN105720303A (en) | Fluoro-carboxylic ester contained electrolyte for high-voltage lithium ion battery | |
| Cui et al. | Antioxidation mechanism of highly concentrated electrolytes at high voltage | |
| CN101304101A (en) | Cylinder type lithium ion battery electrolytic solution and preparation method thereof | |
| CN102437372B (en) | Lithium-ion battery electrolyte and lithium-ion battery containing same | |
| CN106099185A (en) | A kind of electrolyte and include the lithium ion battery of this electrolyte | |
| CN106684447A (en) | 5V high-voltage electrolyte for lithium ion battery | |
| CN108281700A (en) | Electrolyte, preparation method and secondary lithium-sulfur battery using electrolyte | |
| CN103996873B (en) | The lithium ion battery nonaqueous electrolytic solution of coupling BTR918 graphite cathode | |
| CN106602142A (en) | Electrolyte used for lithium ion battery | |
| Xin et al. | Cointercalation-Free Ether-Based Deep Eutectic Electrolyte for All-Climate Battery | |
| CN105161765B (en) | A kind of lithium ion power battery electrolyte | |
| CN107799826A (en) | Improve electrolyte of graphite electrode surface solid electrolyte film properties and preparation method thereof | |
| CN115000521A (en) | Electrolyte for wide temperature window operation of lithium battery, preparation method of electrolyte and lithium iron phosphate lithium metal battery | |
| CN102055017A (en) | Carbonic ester electrolyte with annular sultone and oxalyl lithium tetraborate composition added | |
| CN109935907A (en) | Application, electrolysis additive, lithium ion battery and its electrolyte of silicon substrate sulfuric ester | |
| CN104269575A (en) | Gel electrolyte of polymer lithium-ion battery | |
| CN104157903B (en) | High-voltage lithium ion battery carbonate-based electrolyte solution and preparation method and application thereof | |
| CN104091967B (en) | A kind of high-voltage lithium ion secondary battery electrolyte | |
| CN117438652A (en) | Electrolyte and application thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | 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: 20170613 |
|
| RJ01 | Rejection of invention patent application after publication |