CN113851725B - Quick-charging electrolyte and application - Google Patents
Quick-charging electrolyte and application Download PDFInfo
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- CN113851725B CN113851725B CN202111093514.2A CN202111093514A CN113851725B CN 113851725 B CN113851725 B CN 113851725B CN 202111093514 A CN202111093514 A CN 202111093514A CN 113851725 B CN113851725 B CN 113851725B
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- 239000003792 electrolyte Substances 0.000 title claims abstract description 36
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000002904 solvent Substances 0.000 claims abstract description 27
- 159000000002 lithium salts Chemical class 0.000 claims abstract description 23
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910003002 lithium salt Inorganic materials 0.000 claims abstract description 22
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229910001416 lithium ion Inorganic materials 0.000 claims abstract description 20
- -1 allyloxy trimethyl silicon Chemical compound 0.000 claims abstract description 19
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- JBTWLSYIZRCDFO-UHFFFAOYSA-N ethyl methyl carbonate Chemical compound CCOC(=O)OC JBTWLSYIZRCDFO-UHFFFAOYSA-N 0.000 claims abstract description 13
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 claims abstract description 12
- MHCFAGZWMAWTNR-UHFFFAOYSA-M lithium perchlorate Chemical compound [Li+].[O-]Cl(=O)(=O)=O MHCFAGZWMAWTNR-UHFFFAOYSA-M 0.000 claims description 10
- 229910001486 lithium perchlorate Inorganic materials 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- 229910002804 graphite Inorganic materials 0.000 claims description 3
- 239000010439 graphite Substances 0.000 claims description 3
- 239000011149 active material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims 1
- 238000013508 migration Methods 0.000 abstract description 4
- 230000005012 migration Effects 0.000 abstract description 4
- 101150058243 Lipf gene Proteins 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 229910013684 LiClO 4 Inorganic materials 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009830 intercalation Methods 0.000 description 2
- 230000002687 intercalation Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000004651 carbonic acid esters Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical group [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 description 1
- 229910001496 lithium tetrafluoroborate Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001603 reducing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
- H01M10/0566—Liquid materials
- H01M10/0569—Liquid materials characterised by the solvents
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
- H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
- H01M10/0563—Liquid materials, e.g. for Li-SOCl2 cells
-
- 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
- H01M2300/00—Electrolytes
- H01M2300/0017—Non-aqueous electrolytes
- H01M2300/0025—Organic electrolyte
- H01M2300/0028—Organic electrolyte characterised by the solvent
- H01M2300/0037—Mixture of solvents
- H01M2300/004—Three solvents
-
- 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
- H01M2300/0088—Composites
- H01M2300/0091—Composites in the form of mixtures
-
- 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)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a quick-charge electrolyte and application thereof, wherein the quick-charge electrolyte comprises a solvent, lithium salt and an additive; solvents include methyl formate, ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate; the additive is allyloxy trimethyl silicon; the mass ratio of the components in the solvent is preferably as follows: methyl formate: ethylene carbonate: methyl ethyl carbonate: dimethyl carbonate is 1: (1 to 3): (1 to 2): (1 to 4); the quick-charging electrolyte is applied to a lithium ion battery; according to the invention, a stable SEI film is formed on the surface of the negative electrode, so that lithium ion migration steric hindrance is reduced; the charging rate and the cycle performance of the obtained lithium ion battery are obviously improved.
Description
Technical Field
The invention relates to the technical field of lithium ion batteries, in particular to a quick-charge electrolyte and application thereof.
Background
Currently, functional lithium ion batteries are the focus of research and development for various large application platforms. The demand of the fast secondary battery is further improved in the market, the fast charging battery can bear large current to carry out ultra-fast charging, the problem that the charging time of the electric vehicle is far longer than that of the conventional oiling is solved, and the battery with better performance in the aspect of fast charging is available in the market. However, terminal automobile manufacturers are always pursuing a lithium ion battery which is quick to charge, high in safety and long in cycle life.
The bottleneck of the rapid charging technology is the lithium intercalation capacity of the negative electrode and the conductivity of the electrolyte, wherein the ion conductivity of the electrolyte limits the conductivity of lithium ions between the positive electrode and the negative electrode, and limits the rapid charging capacity and the safety of the battery.
Disclosure of Invention
The invention aims to provide a quick-charging electrolyte, which forms a stable SEI film on the surface of a negative electrode and reduces lithium ion migration steric hindrance.
In order to solve the technical problem, the technical scheme of the invention is as follows: a fast charge electrolyte comprising a solvent, a lithium salt and an additive;
solvents include methyl formate, ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate;
the additive is allyloxy trimethyl silicon (AMSL).
The mass ratio of the components in the solvent is preferably as follows:
methyl Formate (MF): ethylene Carbonate (EC): methyl ethyl carbonate (EMC): dimethyl carbonate (DMC) is 1: (1 to 3): (1 to 2): (1 to 4).
Preferably, the allyloxy trimethyl silicon accounts for 3 to 5 mass percent of the solvent. The AMSL dosage in the invention is 3% -5%, the dosage is too large, the cost is high, the dosage is too small, and a stable SEI film can not be formed.
The concentration of the lithium salt is preferably 1 to 2mol/L. The lithium salt is sufficient in dosage, and the greater the conductivity of the electrolyte is.
Preferably, the lithium salt comprises one or more of lithium hexafluorophosphate, lithium tetrafluoroborate, lithium bisoxalato borate, lithium perchlorate and lithium hexafluoroarsenate.
It is further preferred that the lithium salt includes lithium hexafluorophosphate and lithium perchlorate, wherein the amount of the lithium hexafluorophosphate substance is 1 to 2 times that of lithium perchlorate. LiPF in the present invention 6 Is a lithium salt with high chemical stability and high solubility, is environment-friendly, and is suitable for the solvent system; liClO (LiClO) 4 Has strong oxidizing property, is applied to electrolyte to effectively improve conductivity, and is used together with AMSL with strong reducing property, and AMSL and LiClO are used together 4 The stable SEI film is formed by effective reaction, positive lithium is not consumed, and the cycle performance is effectively improved.
Preferably, the amount of ethyl methyl carbonate is less than or equal to the amount of ethylene carbonate. In the invention, the EMC is excessive, the MF is compressed, and the dissolution of the AMSL is affected.
The invention further aims to provide a quick-charge lithium ion battery, the quick-charge electrolyte is used, a stable SEI film is formed on the surface of a negative electrode, and the charging multiplying power and the cycle performance are obviously improved.
In order to solve the technical problem, the technical scheme of the invention is as follows: a fast-charging lithium ion battery comprises a positive electrode, a negative electrode and the fast-charging electrolyte;
the active material of the negative electrode is graphite.
Preferably, the mass ratio of methyl formate, ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate in the quick-charging electrolyte is 1:3:2:4, a step of;
the concentration of lithium salt is 2mol/L;
the allyloxy trimethyl silicon accounts for 5% of the solvent by mass.
Preferred lithium salts include lithium hexafluorophosphate and lithium perchlorate, wherein lithium hexafluorophosphate is 2 times the mass of lithium perchlorate. The invention uses lithium salt LiPF 6 Collocating LiClO 4 On the other hand, by adding the additive AMSL to interact with LiClO4, a stable SEI film is formed on the surface of the negative electrode, and the cycle life is prolonged.
By adopting the technical scheme, the invention has the beneficial effects that:
the additive in the electrolyte is allyloxy trimethyl silicon (AMSL), the AMSL has strong reducibility, lithium ions are preferentially obtained to generate chemical reaction, the product can be attached to the surface of a negative electrode and is a part of an SEI film, and a stable SEI film is formed to cover the surface of a graphite negative electrode; wherein, both the AMSL and the DMC have oxygen-containing groups, and when the AMSL and the lithium salt form an SEI film according to a similar compatibility principle, the DMC can exist on the SEI film surface layer, and a mixed phase is formed on the SEI film surface layer, so that the lithium ion migration steric hindrance is reduced; according to the invention, the synergy between the AMSL and the solvent is desolvated, the steric hindrance of ion intercalation is reduced, the conductivity of the electrolyte is increased, the charging rate is improved, and the cycle performance of the battery is improved;
the solvent is a composition of Methyl Formate (MF), ethylene Carbonate (EC), methyl ethyl carbonate (EMC) and dimethyl carbonate (DMC); the carbonic acid ester additive EC is a necessary solvent, and has a certain film forming effect, so that the EC is used as a solvent on one hand and is used as a film forming additive on the other hand; MF is a proportioning solvent to help dissolve the lithium salt additive; DMC has good electrochemical stability and low viscosity, is favorable for improving conductivity, can generate synergistic effect with AMSL to form stable SEI film, and is suitable for electrolyte containing AMSL system; EMC is a polar solvent, and is used together with EC to help EC to form a film;
the quick-charging electrolyte provided by the invention effectively improves the charging multiplying power of the battery and improves the cycle performance of the battery.
Thereby achieving the above object of the present invention.
Drawings
FIG. 1 is a graph showing the cycle performance curves (1C/1C, 25 ℃) of lithium ion batteries produced from the electrolytes obtained in examples 1 to 4 of the present invention and comparative examples.
Detailed Description
In order to further explain the technical scheme of the invention, the invention is explained in detail by specific examples.
Example 1
The embodiment discloses a quick-charging electrolyte, which comprises the following specific components:
solvent (mass ratio): MF: EC: EMC dmc=1: 1:1:1, a step of;
the concentration of lithium salt is 1mol/L; liPF (LiPF) 6 With LiClO 4 The molar ratio is 1:1, a step of;
the mass percentage of the additive AMSL in the solvent is 3%.
Example 2
The embodiment discloses a quick-charging electrolyte, which comprises the following specific components:
solvent (mass ratio): MF: EC: EMC dmc=1: 2:2:3, a step of;
lithium salt: 1.3mol/L; liPF (LiPF) 6 With LiClO 4 The molar ratio is 1.3:1, a step of;
the mass percentage of the additive AMSL in the solvent is 4%.
Example 3
The embodiment discloses a quick-charging electrolyte, which comprises the following specific components:
solvent (mass ratio): MF: EC: EMC dmc=1: 3:2:3, a step of;
lithium salt: 1.6mol/L; liPF (LiPF) 6 With LiClO 4 The molar ratio is 1.6:1, a step of;
additive: AMSL 5%.
Example 4
The embodiment discloses a quick-charging electrolyte, which comprises the following specific components:
solvent: MF: EC: EMC dmc=1: 3:2:4, a step of;
lithium salt: 2mol/L; liPF (LiPF) 6 ：LiClO 4 ＝2：1；
The additive AMSL accounts for 5% of the mass of the solvent.
Comparative example
The embodiment discloses a quick-charging electrolyte, which comprises the following specific components:
solvent (mass ratio): EC: EMC dmc=1: 1:1, a step of;
lithium salt: 1mol/L; liPF (LiPF) 6 。
The electrolytes obtained in examples 1 to 4 and comparative examples were tested for conductivity, and are shown in table 1 in detail.
Table 1 conductivity of the electrolytes obtained in examples 1 to 4 and comparative example
| Group of | Conductivity (S/cm) |
| Comparative example | 6.4 |
| Example 1 | 7.7 |
| Example 2 | 7.8 |
| Example 3 | 7.9 |
| Example 4 | 8.1 |
As can be seen from Table 1, the electrolyte provided by the invention has higher conductivity than the electrolyte of the comparative example, and the conductivity increases with the increase of the lithium salt. The electrolyte is injected into a dry battery of 2000mAh, the battery is activated after formation, and the rate charging test and the cycle test are carried out, wherein the rate charging test is carried out by charging at different rates, the charge amount (mAh) is recorded as shown in Table 2, and the cycle performance test is shown in FIG. 1.
The positive electrode material of the dry battery is lithium iron phosphate, and the negative electrode material is artificial graphite.
Table 2 rate charge test of lithium ion batteries obtained in examples 1 to 4 and comparative example
As can be seen from table 2, the charging capacity of the comparative example battery is obviously reduced along with the increase of the charging rate, and when the charging rate reaches 4C, the charging capacity of the comparative example battery drops off, which indicates that the internal conductivity of the electrolyte is insufficient and cannot bear the migration of lithium ions with large rate; examples 1-4 show that the charge level fluctuation is smaller with increasing charge rate, and the charge level of example 4 reaches 1979mAh when the charge rate is increased to 5C, with good quick charge performance.
As can be seen from fig. 1, in the comparative example in which no AMSL was added, the SEI film was unstable in the late cycle, resulting in the loss of positive lithium ions, and the overall battery capacity was fast decayed; examples 1 to 4 addition of AMSL and LiClO 4 And the SEI repairing process is carried out by replacing lithium ions in the positive electrode, so that the whole battery is slow in cycle attenuation and gentle in cycle curve.
The quick-charging electrolyte provided by the invention has high conductivity, and can be applied to a battery to improve the charging multiplying power and the cycle life of the battery.
Claims (5)
1. The fast-charging electrolyte is characterized in that: including solvents, lithium salts, and additives;
solvents include methyl formate, ethylene carbonate, methyl ethyl carbonate, and dimethyl carbonate;
the additive is allyloxy trisilane;
the mass ratio of the components in the solvent is as follows:
methyl formate: ethylene carbonate: methyl ethyl carbonate: dimethyl carbonate is 1: (1 to 3): (1 to 2): (1 to 4);
the allyloxy trisilane accounts for 3 to 5 percent of the mass of the solvent;
the lithium salt includes lithium hexafluorophosphate and lithium perchlorate, wherein the amount of lithium hexafluorophosphate is 1 to 2 times that of lithium perchlorate;
the amount of methyl ethyl carbonate is less than or equal to the amount of ethylene carbonate.
2. A fast charge electrolyte as set forth in claim 1 wherein: the concentration of the lithium salt is 1 to 2mol/L.
3. A fast-charging lithium ion battery is characterized in that: comprising a positive electrode, a negative electrode and the fast-charging electrolyte of any one of claims 1 or 2;
the active material of the negative electrode is graphite.
4. The fast-charging lithium-ion battery of claim 3, wherein: the mass ratio of methyl formate, ethylene carbonate, methyl ethyl carbonate and dimethyl carbonate in the quick-charging electrolyte is 1:3:2:4, a step of;
the concentration of lithium salt is 2mol/L;
the allyloxy trisilane accounts for 5% of the solvent by mass.
5. The fast-charging lithium-ion battery of claim 3, wherein: the lithium salt includes lithium hexafluorophosphate and lithium perchlorate, wherein the amount of lithium hexafluorophosphate material is 2 times that of lithium perchlorate.
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| CN202111093514.2A CN113851725B (en) | 2021-09-17 | 2021-09-17 | Quick-charging electrolyte and application |
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| CN202111093514.2A CN113851725B (en) | 2021-09-17 | 2021-09-17 | Quick-charging electrolyte and application |
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| CN113851725B true CN113851725B (en) | 2023-10-10 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063280A (en) * | 2017-12-23 | 2018-05-22 | 清远佳致新材料研究院有限公司 | Lithium-ion battery electrolytes |
| CN108470939A (en) * | 2018-03-31 | 2018-08-31 | 广东天劲新能源科技股份有限公司 | A kind of heat safe electrolyte of big multiplying power and lithium ion battery |
| CN110190331A (en) * | 2019-06-18 | 2019-08-30 | 郑州中科新兴产业技术研究院 | A kind of electrolyte, preparation and its application on firm lithium ion battery silicon-carbon surface |
| CN111048833A (en) * | 2019-10-30 | 2020-04-21 | 深圳市卓能新能源股份有限公司 | High-voltage electrolyte and high-voltage lithium ion power battery |
| CN111987362A (en) * | 2020-10-09 | 2020-11-24 | 昆山宝创新能源科技有限公司 | Lithium ion battery electrolyte and preparation method and application thereof |
-
2021
- 2021-09-17 CN CN202111093514.2A patent/CN113851725B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108063280A (en) * | 2017-12-23 | 2018-05-22 | 清远佳致新材料研究院有限公司 | Lithium-ion battery electrolytes |
| CN108470939A (en) * | 2018-03-31 | 2018-08-31 | 广东天劲新能源科技股份有限公司 | A kind of heat safe electrolyte of big multiplying power and lithium ion battery |
| CN110190331A (en) * | 2019-06-18 | 2019-08-30 | 郑州中科新兴产业技术研究院 | A kind of electrolyte, preparation and its application on firm lithium ion battery silicon-carbon surface |
| CN111048833A (en) * | 2019-10-30 | 2020-04-21 | 深圳市卓能新能源股份有限公司 | High-voltage electrolyte and high-voltage lithium ion power battery |
| CN111987362A (en) * | 2020-10-09 | 2020-11-24 | 昆山宝创新能源科技有限公司 | Lithium ion battery electrolyte and preparation method and application thereof |
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