CN103928707A - High voltage lithium ion battery functional electrolyte and preparation method and application - Google Patents
High voltage lithium ion battery functional electrolyte and preparation method and application Download PDFInfo
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- CN103928707A CN103928707A CN201410191202.9A CN201410191202A CN103928707A CN 103928707 A CN103928707 A CN 103928707A CN 201410191202 A CN201410191202 A CN 201410191202A CN 103928707 A CN103928707 A CN 103928707A
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- 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
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/4235—Safety or regulating additives or arrangements in electrodes, separators or electrolyte
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention belongs to the field of chemistry and chemical engineering, in particular to high voltage lithium ion battery functional electrolyte and a preparation method and application. The high voltage lithium ion battery functional electrolyte is obtained by adding a functional addictive with the mass equivalent to 0.1-5% of the mass of ordinary electrolyte into the ordinary electrolyte, the ordinary electrolyte is formed by cyclic carbonate solvent, linear carbonate solvent and conductive lithium salt. The functional addictive is dialkyl phenyl phosphonic acid salt, the structural formula of the ordinary electrolyte is shown as formula 1, wherein 0<=n<=5. The high voltage lithium ion battery functional electrolyte can remarkably improve circulating stability of a high voltage lithium ion battery under the condition of high temperature and high potential and can be widely applied to the field of lithium ion battery manufacture. (Please find the formula in the specification).
Description
Technical field
The invention belongs to chemical field, be specifically related to a kind of high-voltage lithium ion batteries function electrolyte and preparation method and application.
Background technology
Lithium ion battery is the highest secondary cell of specific energy so far, has been widely used as the power supply of portable electric appts, as: mobile phone, digital camera, notebook computer etc.Needs based on current energy-saving and emission-reduction, people expect that lithium ion battery can further develop, and replace fuel oil as the electrical source of power of communications and transportation.New-energy electric vehicle industry is classified as strategic new industry field by country.The specific energy density that lithium ion battery is lower and expensive be current lithium ion battery to the bottleneck of electrokinetic cell development.
In order to improve the specific energy density of lithium ion battery, some positive electrodes with high workload current potential arise at the historic moment, as olivine structural high pressure material LiCoPO
4(4.8V), LiNiPO
4(5.2V), spinel structure high pressure material LiMn
1.5ni
0.5o
4(4.8V) etc.Yet, due to traditional LiPF
6/ carbonic ester electrolyte system is (>4.5V, vs.Li/Li under high potential
+) easily there is oxidation Decomposition, and be accompanied by CO
2, H
2the formation of the oxidation products such as O.CO
2generation for the security performance of battery, cause potential threat; H
2the generation of O makes LiPF
6/ carbonic ester electrolyte system generation self-catalyzed reaction, the production of its intermediate product HF can cause LiMn
1.5ni
0.5o
4the stripping of material metal atom Mn, Ni, causes the structure of material distortion occurs or cave in.Obviously, the existence of these problems affects the chemical property of material, as: initial irreversible capacity, stable circulation and high-temperature stability etc.Thereby the stability that solution electrolyte body ties up under high potential condition promotes the application of high potential positive electrode in lithium ion to have very important significance.
In view of traditional electrolyte labile problem under high-voltage, for improving the oxidation stability of electrolyte, what first people attempted is to substitute organic carbonate ester solvent with having the organic solvent molecular moiety that high oxidation is stable, forms new electrolyte system.Sulfone compound, organic nitrile compounds and alpha-fluorocarboxylate ester/carbonates, owing to having good oxidation stability, are considered as solvent or the cosolvent system of electrolyte.The electrolyte system that contains these a few kind solvent molecules has good oxidation stability, yet is limited by that its viscosity is large, conductivity is low, cannot be in problems such as graphite electrode interface formation SEI films, and its research still rests in basic research.
More the method for simple and effective is to add functional additive in traditional electrolyte system, by the preferential oxidation decomposition of additive and at electrode material surface formation protective layer, thereby suppresses the decomposition of electrolyte and the stripping of material.
Summary of the invention
Primary and foremost purpose of the present invention is to overcome prior art LiPF
6/ carbonic ester electrolyte body ties up to unsettled shortcoming and defect under high potential, a kind of high-voltage lithium ion batteries function electrolyte is provided, this electrolyte contains functional additive dialkyl phenyl organic phosphonate, can significantly improve cyclical stability and fail safe under lithium ion battery high voltage condition.
Another object of the present invention is to provide the preparation method of above-mentioned high-voltage lithium ion batteries function electrolyte.
A further object of the present invention is to provide the application of above-mentioned high-voltage lithium ion batteries function electrolyte.
Object of the present invention is achieved through the following technical solutions:
A high-voltage lithium ion batteries function electrolyte is that the functional additive that is equivalent to common electrolyte quality 0.1～5% in common electrolyte interpolation obtains; Described common electrolyte consists of cyclic carbonate ester solvent, linear carbonates solvent and electric conducting lithium salt; Described functional additive is dialkyl phenyl organic phosphonate;
The structural formula of described dialkyl phenyl organic phosphonate is as shown in Equation 1:
Wherein, 0≤n≤5;
Described dialkyl phenyl organic phosphonate is preferably phosphenylic acid dimethyl ester;
Described cyclic carbonate ester solvent and the mass ratio of linear carbonates solvent are that (1:3)～(3:2), the final concentration of described electric conducting lithium salt in common electrolyte is 0.8～1.2mol/L;
Described cyclic carbonate ester solvent is ethylene carbonate (EC);
Described linear carbonates solvent is a kind of in dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), diethyl carbonate (DEC) and methyl propyl carbonate (MPC) or at least two kinds;
Described electric conducting lithium salt is LiPF
6, LiBOB, LiSO
3cF
3, LiClO
4, LiAsF
6, Li (CF
3sO
2)
2n and LiC (CF
3sO
2)
3in a kind of or at least two kinds;
The preparation method of above-mentioned high-voltage lithium ion batteries function electrolyte, comprises the steps:
(1) by cyclic carbonate ester solvent and linear carbonates solvent, clarification, dewater, obtain mixed solvent; Electric conducting lithium salt is added in the mixed solvent of cyclic carbonate and linear carbonates, stir, obtain common electrolyte;
(2) in the common electrolyte obtaining in step (1), add the functional additive that is equivalent to common electrolyte quality 0.1～5%, obtain high-voltage lithium ion batteries function electrolyte;
The mass ratio of the cyclic carbonate ester solvent described in step (1) and linear carbonates solvent is (1:3)～(3:2);
Cyclic carbonate ester solvent described in step (1) is ethylene carbonate (EC);
Linear carbonates solvent described in step (1) is a kind of in dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), diethyl carbonate (DEC) and methyl propyl carbonate (MPC) or at least two kinds;
The final concentration of electric conducting lithium salt described in step (1) in common electrolyte is 0.8～1.2mol/L;
Electric conducting lithium salt described in step (1) is LiPF
6, LiBOB, LiSO
3cF
3, LiClO
4, LiAsF
6, Li (CF
3sO
2)
2n, LiC (CF
3sO
2)
3in a kind of or at least two kinds;
Clarification described in step (1), dewater preferably and to process by any one or at least two kinds in molecular sieve, activated carbon, calcium hydride, lithium hydride, anhydrous calcium oxide, calcium chloride, phosphorus pentoxide, alkali metal or alkaline-earth metal;
Described molecular sieve can adopt
type,
type or
type;
Functional additive described in step (2) is dialkyl phenyl organic phosphonate;
The structural formula of described dialkyl phenyl organic phosphonate is as shown in Equation 1:
Wherein, 0≤n≤5;
Described dialkyl phenyl organic phosphonate is preferably phosphenylic acid dimethyl ester;
Described high-voltage lithium ion batteries function electrolyte is applied to manufacture high pressure lithium ion battery, and the battery obtaining has good charge-discharge performance.
The present invention has following advantage and effect with respect to prior art:
(1) functional additive that the present invention uses can have precedence over carbonate solvent at anodal surface oxidation; form the more stable protective layer of one deck; by this tunic; suppressed on the one hand under high voltage electrolyte solvent component oxidation Decomposition further; the stripping phenomenon that has suppressed to a certain extent on the other hand positive electrode; effectively protect positive electrode, thereby improved cycle performance and the security performance of high-voltage lithium ion batteries.
(2) functional additive that the present invention uses can have precedence over carbonate solvent at anodal surface oxidation, forms the more stable protective layer of one deck, suppresses electrolyte decomposition, more than oxidizing potential is brought up to 5.5V by the 4.7V of standard electrolytic liquid.
(3) the formed anodal diaphragm stability and high efficiency of functional additive that the present invention uses, after high temperature circulation, battery impedance is less than standard electrolytic liquid.
Accompanying drawing explanation
The 1C charge-discharge performance comparison diagram that Fig. 1 is the lithium ion battery made of the electrolyte prepared of the embodiment of the present invention 1 and comparative example at 50 ℃ of high temperature.
Fig. 2 is the oxidation stability comparison diagram of the electrolyte prepared of the embodiment of the present invention 1 and comparative example on metal platinum electrode.
Fig. 3 AC impedance comparison diagram that to be the lithium ion battery made of the electrolyte prepared of the embodiment of the present invention 1 and comparative example circulate after 100 circles at 50 ℃ of high temperature.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
In embodiment, phosphenylic acid dimethyl ester is purchased from A Faaisha (China) Chemical Co., Ltd.;
Embodiment 1
(1) by cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent dimethyl carbonate (DMC) EC:DMC=1:2 mixing in mass ratio, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent; By electric conducting lithium salt LiPF
6be dissolved in the mixed solvent of ethylene carbonate and dimethyl carbonate, stir, obtain common electrolyte; Wherein, electric conducting lithium salt LiPF
6final concentration in common electrolyte is 1.0mol/L;
(2) in the common electrolyte of preparing in step (1), add phosphenylic acid dimethyl ester, the consumption of phosphenylic acid dimethyl ester is common electrolyte quality 0.5%; Obtain high-voltage lithium ion batteries function electrolyte.
Embodiment 2
(1) cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent dimethyl carbonate (DMC) are mixed according to mass ratio EC:DMC=1:3, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent; By electric conducting lithium salt LiPF
6be dissolved in the mixed solvent of ethylene carbonate and dimethyl carbonate, stir, obtain common electrolyte; Wherein, electric conducting lithium salt LiPF
6final concentration in common electrolyte is 0.8mol/L;
(2) in the common electrolyte of preparing in step (1), add phosphenylic acid dimethyl ester, the consumption of phosphenylic acid dimethyl ester is common electrolyte quality 0.1%; Obtain high-voltage lithium ion batteries function electrolyte.
Embodiment 3
(1) cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent methyl ethyl carbonate (EMC) are mixed according to mass ratio EC:EMC=1:2, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent; By electric conducting lithium salt LiSO
3cF
3be dissolved in the mixed solvent of ethylene carbonate and dimethyl carbonate, stir, obtain common electrolyte; Wherein, electric conducting lithium salt LiSO
3cF
3final concentration in common electrolyte is 1.0mol/L;
(2) in the common electrolyte of preparing in step (1), add phosphenylic acid dimethyl ester, the consumption of phosphenylic acid dimethyl ester is common electrolyte quality 1%; Obtain high-voltage lithium ion batteries function electrolyte.
Embodiment 4
(1) cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent methyl ethyl carbonate (EMC) are mixed according to mass ratio EC:EMC=1:1, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent; By electric conducting lithium salt LiPF
6be dissolved in the mixed solvent of ethylene carbonate and dimethyl carbonate, stir, obtain common electrolyte; Wherein, electric conducting lithium salt LiPF
6final concentration in common electrolyte is 0.8mol/L;
(2) in the common electrolyte of preparing in step (1), add phosphenylic acid dimethyl ester, the consumption of phosphenylic acid dimethyl ester is common electrolyte quality 2%; Obtain high-voltage lithium ion batteries function electrolyte.
Embodiment 5
(1) cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent dimethyl carbonate (DMC) are mixed according to mass ratio EC:DMC=3:2, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent; By electric conducting lithium salt LiAsF
6be dissolved in the mixed solvent of ethylene carbonate and dimethyl carbonate, stir, obtain common electrolyte; Wherein, electric conducting lithium salt LiAsF
6final concentration in common electrolyte is 1.0mol/L;
(2) in the common electrolyte of preparing in step (1), add phosphenylic acid dimethyl ester, the consumption of phosphenylic acid dimethyl ester is common electrolyte quality 1%; Obtain high-voltage lithium ion batteries function electrolyte.
Embodiment 6
(1) cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent methyl ethyl carbonate (EMC) are mixed according to mass ratio EC:EMC=3:2, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent; By electric conducting lithium salt LiPF
6be dissolved in the mixed solvent of ethylene carbonate and methyl ethyl carbonate, stir, obtain common electrolyte; Wherein, electric conducting lithium salt LiPF
6final concentration in common electrolyte is 0.8mol/L;
(2) in the common electrolyte of preparing in step (1), add phosphenylic acid dimethyl ester, the consumption of phosphenylic acid dimethyl ester is common electrolyte quality 2%; Obtain high-voltage lithium ion batteries function electrolyte.
Embodiment 7
(1) cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent dimethyl carbonate (DMC) are mixed according to mass ratio EC:DMC=1:2, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent; By electric conducting lithium salt LiPF
6be dissolved in the mixed solvent of ethylene carbonate and dimethyl carbonate, stir, obtain common electrolyte; Wherein, electric conducting lithium salt LiPF
6final concentration in common electrolyte is 1.2mol/L;
(2) in the common electrolyte of preparing in step (1), add phosphenylic acid dimethyl ester, the consumption of phosphenylic acid dimethyl ester is common electrolyte quality 5%; Obtain high-voltage lithium ion batteries function electrolyte.
Comparative example
(1) by cyclic carbonate ester solvent ethylene carbonate (EC) and linear carbonates solvent dimethyl carbonate (DMC) EC:DMC=1:2 mixing by volume, and adopt
molecular sieve, calcium hydride, lithium hydride clarification, dewater, obtain mixed solvent;
(2) by electric conducting lithium salt LiPF
6be dissolved in the mixed solvent of ethylene carbonate and dimethyl carbonate electric conducting lithium salt LiPF
6final concentration be 1.0mol/L, stir, obtain common electrolyte.
Effect comparison:
The common electrolyte that the high-voltage lithium ion batteries function electrolyte that embodiment 1 is prepared and comparative example prepare compares:
(1) to be the high pressure lithium ion battery made of the electrolyte prepared of embodiment 1 and comparative example carry out the test of charge-discharge performance to Fig. 1 at 50 ℃ of high temperature: with LiMn
1.5ni
0.5o
4for anodal, lithium metal are that the high-voltage lithium ion batteries function electrolyte of negative pole, embodiment 1 preparation or common electrolyte prepared by comparative example are electrolyte ingredient battery, within the scope of 3.5～4.95V potential region, under 50 ℃ of conditions of high temperature, carry out 1C charge and discharge cycles.
Effect comparison: battery high-temperature circulation 100 circles, comparative example's capability retention is only 42.1%, and the capability retention of embodiment 1 is up to 91.4% (Fig. 1), the high pressure high-temperature lithium ion battery cycle performance that contains as seen the phosphenylic acid dimethyl ester functional additive described in patent of the present invention significantly improves.
(2) Fig. 2 is the oxidation stability comparison diagram of the electrolyte prepared of the embodiment of the present invention 1 and comparative example on metal platinum electrode.Method of testing is: in V-type glass tube, take metal platinum as anodal, lithium metal are that the high-voltage lithium ion batteries function electrolyte of negative pole, embodiment 1 preparation or common electrolyte prepared by comparative example are electrolyte ingredient battery, from Open Circuit Potential, start to be swept to 6V with 5mV/s speed and finish.Fig. 2 is visible, and the high-voltage lithium ion batteries electrolyte of embodiment 1 preparation has a little oxidation peak in 4.4V left and right, and this oxidation peak is attributable to the oxidation peak of additive; More than the oxidizing potential of the high-voltage lithium ion batteries electrolyte of embodiment 1 preparation is brought up to 5.5V by the 4.7V of standard electrolytic liquid, this is because additive preferential oxidation forms layer protective layer, has suppressed the decomposition of electrolyte.
(3) Fig. 3 AC impedance comparison diagram that to be the lithium ion battery made of the electrolyte prepared of the embodiment of the present invention 1 and comparative example circulate after 100 circles at 50 ℃ of high temperature.Method of testing is: with LiMn
1.5ni
0.5o
4for anodal, lithium metal are that the high-voltage lithium ion batteries function electrolyte of negative pole, embodiment 1 preparation or common electrolyte prepared by comparative example are electrolyte ingredient battery, within the scope of 3.5～4.95V potential region, under 50 ℃ of conditions of high temperature, carry out, after charge and discharge cycles 100 circles, measuring the variation of electrode surface impedance.As shown in Figure 3; the impedance of the cathode film of the common electrolyte formation that the impedance ratio comparative example of the cathode film that the high-voltage lithium ion batteries function electrolyte that after circulation, embodiment 1 prepares forms obtains is little, further illustrates phosphenylic acid dimethyl ester and can form on anodal surface stable, effective diaphragm.
Above-described embodiment is preferably execution mode of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. a high-voltage lithium ion batteries function electrolyte, it is characterized in that adding and being equivalent to that the functional additive of common electrolyte quality 0.1～5% obtains at common electrolyte; Described common electrolyte consists of cyclic carbonate ester solvent, linear carbonates solvent and electric conducting lithium salt; Described functional additive is dialkyl phenyl organic phosphonate;
The structural formula of described dialkyl phenyl organic phosphonate is as shown in Equation 1:
Wherein, 0≤n≤5.
2. high-voltage lithium ion batteries function electrolyte according to claim 1, is characterized in that: described dialkyl phenyl organic phosphonate is phosphenylic acid dimethyl ester.
3. high-voltage lithium ion batteries function electrolyte according to claim 1, is characterized in that:
Described cyclic carbonate ester solvent and the mass ratio of linear carbonates solvent are that (1:3)～(3:2), the final concentration of described electric conducting lithium salt in common electrolyte is 0.8～1.2mol/L.
4. high-voltage lithium ion batteries function electrolyte according to claim 1, is characterized in that:
Described cyclic carbonate ester solvent is ethylene carbonate;
Described linear carbonates solvent is a kind of in dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate and methyl propyl carbonate or at least two kinds;
Described electric conducting lithium salt is LiPF
6, LiBOB, LiSO
3cF
3, LiClO
4, LiAsF
6, Li (CF
3sO
2)
2n and LiC (CF
3sO
2)
3in a kind of or at least two kinds.
5. the preparation method of the high-voltage lithium ion batteries function electrolyte described in claim 1～4 any one, is characterized in that comprising following steps:
(1) by cyclic carbonate ester solvent and linear carbonates solvent, clarification, dewater, obtain mixed solvent; Electric conducting lithium salt is added in the mixed solvent of cyclic carbonate and linear carbonates, stir, obtain common electrolyte;
(2) in the common electrolyte obtaining in step (1), add the functional additive that is equivalent to common electrolyte quality 0.1～5%, obtain high-voltage lithium ion batteries function electrolyte;
Functional additive described in step (2) is dialkyl phenyl organic phosphonate;
The structural formula of described dialkyl phenyl organic phosphonate is as shown in Equation 1:
Wherein, 0≤n≤5.
6. the preparation method of high-voltage lithium ion batteries function electrolyte according to claim 5, is characterized in that:
Described dialkyl phenyl organic phosphonate is phosphenylic acid dimethyl ester.
7. the preparation method of high-voltage lithium ion batteries function electrolyte according to claim 5, is characterized in that:
The mass ratio of the cyclic carbonate ester solvent described in step (1) and linear carbonates solvent is (1:3)～(3:2);
The final concentration of electric conducting lithium salt described in step (1) in common electrolyte is 0.8～1.2mol/L.
8. the preparation method of high-voltage lithium ion batteries function electrolyte according to claim 5, is characterized in that:
Cyclic carbonate ester solvent described in step (1) is ethylene carbonate;
Linear carbonates solvent described in step (1) is a kind of in dimethyl carbonate, methyl ethyl carbonate, diethyl carbonate and methyl propyl carbonate or at least two kinds;
Electric conducting lithium salt described in step (1) is LiPF
6, LiBOB, LiSO
3cF
3, LiClO
4, LiAsF
6, Li (CF
3sO
2)
2n, LiC (CF
3sO
2)
3in a kind of or at least two kinds.
9. the preparation method of high-voltage lithium ion batteries function electrolyte according to claim 5, is characterized in that:
Clarification described in step (1), dewater and process by any one or at least two kinds in molecular sieve, activated carbon, calcium hydride, lithium hydride, anhydrous calcium oxide, calcium chloride, phosphorus pentoxide, alkali metal or alkaline-earth metal;
Described molecular sieve adopts
type,
type or
type.
10. the application of the high-voltage lithium ion batteries function electrolyte described in claim 1～4 any one in manufacturing high pressure lithium ion battery.
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| CN104201416A (en) * | 2014-08-22 | 2014-12-10 | 华南师范大学 | Functional electrolyte of high-voltage lithium ion battery, as well as preparation method and application |
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| CN104201416A (en) * | 2014-08-22 | 2014-12-10 | 华南师范大学 | Functional electrolyte of high-voltage lithium ion battery, as well as preparation method and application |
| CN104201416B (en) * | 2014-08-22 | 2016-10-19 | 华南师范大学 | A kind of high voltage lithium ion battery functional electrolyte and preparation method and application |
| CN105633465A (en) * | 2016-03-09 | 2016-06-01 | 华南师范大学 | Ethylene sulfate additive contained high-voltage functional electrolyte and preparation method and application therefor |
| CN105742703A (en) * | 2016-03-09 | 2016-07-06 | 华南师范大学 | High-voltage functional electrolyte containing LiDFOB additive and preparation and application thereof |
| CN109473718A (en) * | 2018-10-08 | 2019-03-15 | 河南师范大学 | A kind of high voltage withstanding electrolysis additive of lithium ion battery and non-aqueous electrolyte for lithium ion cell and application containing the additive |
| CN109473718B (en) * | 2018-10-08 | 2021-08-24 | 河南师范大学 | High-voltage-resistant electrolyte additive for lithium ion battery, lithium ion battery non-aqueous electrolyte containing additive and application |
| CN112582672A (en) * | 2019-09-27 | 2021-03-30 | 东莞市杉杉电池材料有限公司 | Ternary lithium ion battery non-aqueous electrolyte and ternary lithium ion battery containing same |
| WO2021179300A1 (en) * | 2020-03-13 | 2021-09-16 | 宁德新能源科技有限公司 | Electrochemical device and electronic device comprising same |
| CN113972397A (en) * | 2021-09-27 | 2022-01-25 | 华南理工大学 | Electrolyte for lithium metal secondary battery and application thereof |
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