CN104218256A - Lithium ion battery high voltage electrolyte additive, electrolyte, preparation method of electrolyte, and lithium ion secondary battery - Google Patents
Lithium ion battery high voltage electrolyte additive, electrolyte, preparation method of electrolyte, and lithium ion secondary battery Download PDFInfo
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- CN104218256A CN104218256A CN201310205174.7A CN201310205174A CN104218256A CN 104218256 A CN104218256 A CN 104218256A CN 201310205174 A CN201310205174 A CN 201310205174A CN 104218256 A CN104218256 A CN 104218256A
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- electrolyte
- lithium ion
- high voltage
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- ion battery
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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
-
- 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
- H01M10/058—Construction or manufacture
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention belongs to the technical field of lithium ion battery, and relates to a lithium ion battery high voltage electrolyte additive and a lithium ion battery high voltage electrolyte containing the additive, wherein the additive is organic phosphine. The invention also discloses a preparation method of the lithium ion battery high voltage electrolyte containing the additive. The additive can be oxidized before the electrolyte to form a solid electrolyte interface (SEI) layer with a thickness of several nanometers on the positive electrode surface, the SEI layer can effectively prevent the oxygenolysis of electrolyte in the positive electrode and the corrosion of electrolyte on the positive electrode material under a high voltage condition, and thus the battery capacity and circulation service life of lithium ion battery under a high voltage condition are both effectively improved.
Description
Technical field
The present invention relates to field of batteries, particularly a kind of high voltage electrolysis additive of lithium ion battery, lithium ion battery high voltage electrolyte and preparation method thereof, lithium rechargeable battery.
Background technology
Current, the mankind are being faced with the double challenge of resource estimation and living environment deterioration.For this reason, new material is being made great efforts to research and develop in countries in the world, advances the new concept of low-carbon (LC) life, promotes human society to turn to sustainable development mode energy-saving, capable of circulation by current high energy consumption, the high flow rate life mode of production.Be specially the application of wideling popularize clean energy resource, as the application at power field of solar energy, wind energy, and use hybrid vehicle or pure electric automobile to replace using at present the orthodox car of gasoline.
The application of clean energy resource and new automobile all be unable to do without medium-and-large-sized energy-storage battery and electrokinetic cell.In numerous energy-storage batteries and electrokinetic cell, lithium rechargeable battery is owing to having higher energy density and longer useful life, replaced gradually traditional ni-mh/NI-G secondary cell, it has great development prospect at emerging fields such as new-energy automobile, wind-powered electricity generation energy storage and solar energy storages.Along with increasing of electric automobile, hybrid electric vehicle, cordless power tool and military application, the energy density of lithium ion battery is had higher requirement.In order to improve the energy density of battery, the operating potential that improves positive electrode is the inevitable course.There is high voltage and jumbo new positive electrode as rich lithium layered cathode material, spinel oxide LiNi
0.5mn
1.5o
4, their operating voltage is all higher, and the upper limit of voltage has approached 5V.The liquid electrolyte of commercial lithium-ion batteries is mainly the carbonate group electrolyte based on ethylene carbonate (EC) at present, when charging voltage is during higher than 4.5V, can there is oxidation Decomposition in conventional carbonate group electrolyte solvent, thereby cause the decline of whole battery performance.The problem of electrolyte becomes the key that restriction lithium ion battery is worked under high voltage.Therefore, be necessary to provide a kind of novel electrolyte that is applied to high-voltage lithium.
Summary of the invention
The technical problem that the present invention solves is to provide a kind of additive of the high voltage electrolyte for lithium ion battery, the preparation method of high voltage electrolyte and the lithium ion battery of applying this electrolyte, additive application of the present invention, in lithium ion battery, can improve battery capacity and cycle life under lithium ion battery high voltage effectively.
In view of this, the invention provides a kind of high voltage electrolysis additive of lithium ion battery, described additive is organic phosphine class, and its structural formula is expressed as:
Wherein, R
1, R
2, R
3be selected from one or more in the aryl of alkynes base, aryl or fluoro of alkylene, alkynes base or fluoro of alkyl, alkylene or the fluoro of alkyl or fluoro.
The present invention also provides a kind of lithium ion battery high voltage electrolyte, comprises solvent, electrolyte and above-mentioned additive.
Correspondingly, the present invention also provides a kind of preparation method of lithium ion battery high voltage electrolyte, comprising:
1), by cyclic carbonate ester solvent and linear carbonate solvent, wherein the volume ratio of cyclic carbonate ester solvent and linear carbonate solvent is 1:1 ~ 1:3;
2) electric conducting lithium salt is added in above-mentioned mixed solvent, making lithium salt is 0.5-1.5mol/L;
3) to step 2) mixture system in add additive claimed in claim 1, make its quality account for 0.5 ~ 2% of electrolyte gross mass.
As a further improvement on the present invention, described cyclic carbonate is ethylene carbonate, and described linear carbonate is selected from one or both in dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate.
As a further improvement on the present invention, described electric conducting lithium salt is selected from LiPF
6, LiClO
4, LiAsF
6, LiBF
4, LiCF
3sO
3or Li (CF
3sO
2)
2n, is preferably LiPF
6.
The present invention also provides a kind of lithium rechargeable battery, comprising: positive pole, negative pole, be arranged on barrier film between positive pole and negative pole and above-mentioned electrolyte.
Compared with prior art, the present invention has the following advantages:
(1) with respect to sulfone kind solvent and additive, high voltage electrolyte anticathode material of the present invention, barrier film does not have special requirement, described additive, can be prior to the oxidation Decomposition of electrolyte, oxidized in charging process, thereby on anodal surface, form uniform SEI (the Solid electrolyte Interface) film of several nanometer thickness of one deck, this SEI layer can stop electrolyte corrosion to positive electrode in anodal oxidation Decomposition and electrolyte under high voltage effectively, thereby battery capacity and the cycle life of lithium ion battery under high voltage is improved significantly.
(2) electrolyte that prepared by preparation method of the present invention is less on battery capacity impact, and preparation method is simple, and cost is low, has good application prospect.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, the accompanying drawing the following describes is only some embodiment that record in the application, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is depicted as the cycle performance curve chart of battery in first embodiment of the invention;
Figure 2 shows that the TEM picture of anode surface SEI layer in first embodiment of the invention.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these are described is for further illustrating the features and advantages of the present invention, rather than limiting to the claimed invention.
The embodiment of the invention discloses a kind of additive of lithium ion battery high voltage electrolyte, described additive is organic phosphine class, and its structural formula is expressed as:
Wherein, R
1, R
2, R
3be selected from one or more in the aryl of alkynes base, aryl or fluoro of alkylene, alkynes base or fluoro of alkyl, alkylene or the fluoro of alkyl or fluoro.
R
1, R
2, R
3can be identical, also can be different.
The embodiment of the invention also discloses a kind of lithium ion battery high voltage electrolyte, comprise solvent, electrolyte and above-mentioned additive.
Solvent can comprise the mixed solvent of cyclic carbonate and linear carbonate solvent.Electrolyte can be selected from LiPF
6, LiClO
4, LiAsF
6, LiBF
4, LiCF
3sO
3, Li (CF
3sO
2)
2n.
The preparation method who the embodiment of the invention also discloses a kind of lithium-ion battery electrolytes, comprising:
1), by cyclic carbonate ester solvent and linear carbonate solvent, wherein the volume ratio of cyclic carbonate ester solvent and linear carbonate solvent is 1:1 ~ 1:3;
2) electric conducting lithium salt is added in above-mentioned mixed solvent, making lithium salt is 0.5-1.5mol/L;
3) to step 2) mixture system in add additive claimed in claim 1, make its quality account for 0. 5 ~ 2% of electrolyte gross mass.
Electric conducting lithium salt is selected from LiPF
6, LiClO
4, LiAsF
6, LiBF
4, LiCF
3sO
3, Li (CF
3sO
2)
2n, preferred electric conducting lithium salt is LiPF
6.The voltage range of lithium ion battery high voltage electrolyte is: the upper limit cut-ff voltage of lithium ion battery is 4.8 ~ 5V.
The embodiment of the present invention also discloses a kind of lithium rechargeable battery, comprising: positive pole, negative pole, be arranged on barrier film between positive pole and negative pole and above-mentioned electrolyte.
The additive of lithium ion battery high voltage electrolyte, can be prior to the oxidation Decomposition of electrolyte, oxidized in charging process, thereby on positive electrode surface, form solid electrolyte (the Solid electrolyte Interface of several nanometer thickness, SEI) layer, this SEI layer can stop electrolyte corrosion to positive electrode in anodal oxidation Decomposition and electrolyte under high voltage effectively, thereby can effectively improve battery capacity and the cycle life under lithium ion battery high voltage.
In order further to understand the present invention, below in conjunction with embodiment, the preparation method of electrolyte provided by the invention is described.Protection scope of the present invention is not limited by the following examples.
embodiment 1
Lithium-ion battery electrolytes additive, (I) is as follows for its structural formula:
（I）
The preparation method who uses the electrolyte of above-mentioned additive, comprises the following steps:
(1) by ethylene carbonate (EC), dimethyl carbonate (DMC), methyl ethyl carbonate (EMC) solvent, wherein the volume ratio of three kinds of solvents is 1:1:1;
(2) by LiPF
6add in above-mentioned mixed solvent, making lithium salt is 1mol/L;
(3) to step 2) mixture system in add the additive of structural formula as shown in (I), make its quality account for 1% of electrolyte gross mass.
Use electrolyte prepared by above-mentioned steps to be designated as electrolyte B, use step 1), 2) electrolyte prepared is designated as electrolyte A, with LiMn
2o
4for positive electrode, metal lithium sheet is negative pole, forms 2025 button cells in glove box, adds respectively electrolyte A and the B of gained.
At room temperature on new prestige charge-discharge test instrument, with the current density of 148mA/g, at 3.5V, to 4.8V, battery is carried out to charge and discharge cycles.Circulate after 170 times, in electrolyte A, the capability retention of material is 82%, and in electrolyte B, the capability retention of material is 93%.
Fig. 1 is corresponding cycle performance curve chart.Illustrate in the present embodiment and pass through to add described additive in electrolyte A, the high voltage electrolyte preparing has improved the cycle life of battery under high voltage greatly.Additive plays critical effect therein.
Fig. 2 is the TEM picture of corresponding positive pole surface SEI layer, proves that additive can be prior to the oxidation Decomposition of electrolyte, oxidized in charging process, thereby on positive electrode surface, has formed the SEI layer of several nanometer thickness.This layer can stop electrolyte corrosion to positive electrode in anodal oxidation Decomposition and electrolyte under high voltage effectively, thereby can effectively improve battery capacity and the cycle life under lithium ion battery high voltage.
embodiment 2
Lithium-ion battery electrolytes additive, its structure is as shown in (II):
（II）
The preparation method who uses the electrolyte of above-mentioned additive, comprises the following steps:
(1) by ethylene carbonate (EC), dimethyl carbonate (DMC) solvent, the volume ratio of two kinds of solvents is 1:1;
(2) by LiPF
6add in above-mentioned mixed solvent, making lithium salt is 1.5mol/L;
(3) to step 4) mixture system in add the additive of structural formula as shown in (3), make its quality account for 0.5% of electrolyte gross mass.
Use electrolyte prepared by above-mentioned steps to be designated as electrolyte D, use step 1), 2) electrolyte prepared is designated as electrolyte C, with LiMn
2o
4for positive electrode, metal lithium sheet is negative pole, forms 2025 button cells in glove box, adds respectively electrolyte C and the D of gained.At room temperature on new prestige charge-discharge test instrument, with the current density of 148mA/g, at 3.5V, to 4.8V, battery is carried out to charge and discharge cycles.Circulate after 170 times, in electrolyte C, the capability retention of material is 82%, and in electrolyte D, the capability retention of material is 92%, illustrates that high voltage electrolyte prepared by the additive that uses in the present embodiment has improved the cycle life of battery under high voltage greatly.
embodiment 3
Lithium-ion battery electrolytes additive, its structure is as shown in (III):
(III)
The preparation method who uses the electrolyte of above-mentioned additive, comprises the following steps:
(1) by ethylene carbonate (EC), diethyl carbonate (DEC) solvent, the volume ratio of two kinds of solvents is 1:3;
(2) by LiClO
4add in above-mentioned mixed solvent, making lithium salt is 1.5mol/L;
(3) to step 4) mixture system in add the additive of structural formula as shown in (3), make its quality account for 2% of electrolyte gross mass.
Use electrolyte prepared by above-mentioned steps to be designated as electrolyte F, use step 1), 2) electrolyte prepared is designated as electrolyte E, with LiMn
2o
4for positive electrode, metal lithium sheet is negative pole, forms 2025 button cells in glove box, adds respectively electrolyte E and the F of gained.At room temperature on new prestige charge-discharge test instrument, with the current density of 148mA/g, at 3.5V, to 4.8V, battery is carried out to charge and discharge cycles.Circulate after 170 times, in electrolyte E, the capability retention of material is 82%, and in electrolyte F, the capability retention of material is 90%, illustrates that high voltage electrolyte prepared by the additive that uses in the present embodiment has improved the cycle life of battery under high voltage greatly.
embodiment 4
Lithium-ion battery electrolytes additive, its structure is as shown in (IV):
（IV）
The preparation method who uses the electrolyte of above-mentioned additive, comprises the following steps:
(1) by ethylene carbonate (EC), dimethyl carbonate (DMC) solvent, the volume ratio of two kinds of solvents is 1:2;
(2) by LiBF
4add in above-mentioned mixed solvent, making lithium salt is 0.5mol/L;
(3) to step 5) mixture system in add the additive of structural formula as shown in (5), make its quality account for 0.5% of electrolyte gross mass.
Use electrolyte prepared by above-mentioned steps to be designated as electrolyte H, use step 1), 2) electrolyte prepared is designated as electrolyte G, with LiMn
2o
4for positive electrode, metal lithium sheet is negative pole, forms 2025 button cells in glove box, adds respectively electrolyte H and the G of gained.At room temperature on new prestige charge-discharge test instrument with the current density of 148mA/g at 3.5V between 4.8V, battery being carried out to charge and discharge cycles.Circulate after 170 times, in electrolyte G, the capability retention of material is 82%, and in electrolyte H, the capability retention of material is 90%, illustrates that high voltage electrolyte prepared by the additive that uses in the present embodiment has improved the cycle life of battery under high voltage greatly.
The explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection range of the claims in the present invention.
Above-mentioned explanation to the disclosed embodiments, makes professional and technical personnel in the field can realize or use the present invention.To the multiple modification of these embodiment, will be apparent for those skilled in the art, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (6)
1. an additive for the high voltage electrolyte of lithium ion battery, is characterized in that: described additive is organic phosphine class, and its structural formula is expressed as:
Wherein, R
1, R
2, R
3be selected from one or more in the aryl of alkynes base, aryl or fluoro of alkylene, alkynes base or fluoro of alkyl, alkylene or the fluoro of alkyl or fluoro.
2. a high voltage electrolyte for lithium ion battery, is characterized in that: comprise solvent, electrolyte and additive claimed in claim 1.
3. a preparation method for the high voltage electrolyte of lithium ion battery, is characterized in that, comprising:
1), by cyclic carbonate ester solvent and linear carbonate solvent, wherein the volume ratio of cyclic carbonate ester solvent and linear carbonate solvent is 1:1 ~ 1:3;
2) electric conducting lithium salt is added in above-mentioned mixed solvent, making lithium salt is 0.5-1.5mol/L;
3) to step 2) mixture system in add additive claimed in claim 1, make its quality account for 0.5 ~ 2% of electrolyte gross mass.
4. the preparation method of the high voltage electrolyte of lithium ion battery according to claim 3, it is characterized in that: described cyclic carbonate is ethylene carbonate, and described linear carbonate is selected from one or both in dimethyl carbonate, diethyl carbonate, methyl ethyl carbonate.
5. the preparation method of the high voltage electrolyte of lithium ion battery according to claim 3, is characterized in that: described electric conducting lithium salt is selected from LiPF
6, LiClO
4, LiAsF
6, LiBF
4, LiCF
3sO
3or Li (CF
3sO
2)
2n.
6. a lithium rechargeable battery, is characterized in that, comprising: positive pole, negative pole, be arranged on barrier film and high-tension electrolyte claimed in claim 2 between positive pole and negative pole.
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| CN201310205174.7A CN104218256A (en) | 2013-05-29 | 2013-05-29 | Lithium ion battery high voltage electrolyte additive, electrolyte, preparation method of electrolyte, and lithium ion secondary battery |
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|---|---|---|---|
| CN201310205174.7A CN104218256A (en) | 2013-05-29 | 2013-05-29 | Lithium ion battery high voltage electrolyte additive, electrolyte, preparation method of electrolyte, and lithium ion secondary battery |
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Family
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186035A (en) * | 2015-07-30 | 2015-12-23 | 山东鸿正电池材料科技有限公司 | Additive capable of improving high voltage performance of electrolyte and electrolyte containing additive |
| EP3291352A1 (en) * | 2016-09-02 | 2018-03-07 | Samsung Electronics Co., Ltd | Electrolyte for lithium secondary battery and lithium secondary battery including the same |
| KR20180026325A (en) * | 2016-09-02 | 2018-03-12 | 삼성전자주식회사 | Electrolyte for lithium secondary battery and lithium secondary battery including the electrolyte |
| CN109065951A (en) * | 2018-07-31 | 2018-12-21 | 东莞市杉杉电池材料有限公司 | A kind of lithium-ion battery electrolytes and lithium ion battery |
| CN111342134A (en) * | 2020-03-13 | 2020-06-26 | 河南电池研究院有限公司 | Wide-temperature-range lithium ion battery non-aqueous electrolyte and preparation method thereof |
| CN113764738A (en) * | 2021-10-12 | 2021-12-07 | 远景动力技术(江苏)有限公司 | Electrolyte for improving high-temperature storage characteristics of battery and lithium ion battery |
| CN113924678A (en) * | 2019-06-05 | 2022-01-11 | 株式会社大赛璐 | Electrolyte for battery and lithium ion battery |
| CN115505115A (en) * | 2022-11-21 | 2022-12-23 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Composition for preparing gel electrolyte, electrolyte and battery thereof |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186035A (en) * | 2015-07-30 | 2015-12-23 | 山东鸿正电池材料科技有限公司 | Additive capable of improving high voltage performance of electrolyte and electrolyte containing additive |
| KR102460956B1 (en) * | 2016-09-02 | 2022-11-08 | 삼성에스디아이 주식회사 | Electrolyte for lithium secondary battery and lithium secondary battery including the electrolyte |
| US10886564B2 (en) * | 2016-09-02 | 2021-01-05 | Samsung Electronics Co., Ltd. | Electrolyte for lithium secondary battery and lithium secondary battery including the electrolyte |
| KR20180026325A (en) * | 2016-09-02 | 2018-03-12 | 삼성전자주식회사 | Electrolyte for lithium secondary battery and lithium secondary battery including the electrolyte |
| CN107799817A (en) * | 2016-09-02 | 2018-03-13 | 三星电子株式会社 | For the electrolyte of lithium secondary battery and including the lithium secondary battery of electrolyte |
| EP3291352A1 (en) * | 2016-09-02 | 2018-03-07 | Samsung Electronics Co., Ltd | Electrolyte for lithium secondary battery and lithium secondary battery including the same |
| US20180065997A1 (en) * | 2016-09-02 | 2018-03-08 | Samsung Electronics Co., Ltd. | Electrolyte for lithium secondary battery and lithium secondary battery including the electrolyte |
| CN107799817B (en) * | 2016-09-02 | 2022-06-17 | 三星电子株式会社 | Electrolyte for lithium secondary battery and lithium secondary battery including the same |
| CN109065951A (en) * | 2018-07-31 | 2018-12-21 | 东莞市杉杉电池材料有限公司 | A kind of lithium-ion battery electrolytes and lithium ion battery |
| CN113924678A (en) * | 2019-06-05 | 2022-01-11 | 株式会社大赛璐 | Electrolyte for battery and lithium ion battery |
| CN111342134B (en) * | 2020-03-13 | 2022-09-13 | 河南电池研究院有限公司 | Wide-temperature-range lithium ion battery non-aqueous electrolyte and preparation method thereof |
| CN111342134A (en) * | 2020-03-13 | 2020-06-26 | 河南电池研究院有限公司 | Wide-temperature-range lithium ion battery non-aqueous electrolyte and preparation method thereof |
| CN113764738A (en) * | 2021-10-12 | 2021-12-07 | 远景动力技术(江苏)有限公司 | Electrolyte for improving high-temperature storage characteristics of battery and lithium ion battery |
| CN113764738B (en) * | 2021-10-12 | 2024-05-14 | 远景动力技术(江苏)有限公司 | Electrolyte for improving high-temperature storage characteristics of battery and lithium ion battery |
| CN115505115A (en) * | 2022-11-21 | 2022-12-23 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Composition for preparing gel electrolyte, electrolyte and battery thereof |
| CN115505115B (en) * | 2022-11-21 | 2023-03-14 | 北京理工大学深圳汽车研究院(电动车辆国家工程实验室深圳研究院) | Composition for preparing gel electrolyte, electrolyte and battery thereof |
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Application publication date: 20141217 |