CN103700884A - Electrolyte of power lithium ion secondary battery - Google Patents
Electrolyte of power lithium ion secondary battery Download PDFInfo
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- CN103700884A CN103700884A CN201310373810.7A CN201310373810A CN103700884A CN 103700884 A CN103700884 A CN 103700884A CN 201310373810 A CN201310373810 A CN 201310373810A CN 103700884 A CN103700884 A CN 103700884A
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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
- H01M10/0569—Liquid materials characterised by the solvents
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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
- 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
- H01M2300/0042—Four or more solvents
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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
- 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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Abstract
The invention discloses an electrolyte of a power lithium ion secondary battery, which is prepared from an electrolyte, a main solvent and an additive according to certain mass percents; the electrolyte of the invention is characterized in that the electrolyte comprises 5-15% of lithium hexafluorophosphate and 1-10% of lithium bis(oxalate)borate; the main solvent comprises 25.0%-35.0% of dimethyl carbonate (DMC), 5.0%-15.0% of ethyl methyl carbonate (EMC), 3.0%-10.0% of ethylene carbonate (EC), and 2.0%-8.0% of propylene carbonate (PC); the additive comprises 1%-3% of ethylene sulfite (ES), 1%-3% of vinylene carbonate (VC), 0.5%-2.0% of 1,3-propane sultone (PS), 0.1%-0.5% of anisole, 0.5%-2.0% of biphenyl (BP), 0.01%-2% of adiponitrile, 0.5%-2.0% of gamma-butyrolactone (GBL), and 0.5%-2.0% of cyclohexylbenzene (CHB). The electrolyte of the invention can significantly improve conductivity, wettability, and high temperature circularity, thus enlarging the application scope of the electrolyte.
Description
Technical field
The present invention relates to a kind of electrolyte of power lithium-ion rechargeable battery, belong to lithium battery field.
Background technology
Development along with microelectric technique, the mobile device of miniaturization is increasing, like this power supply of equipment has also been proposed to very high requirement, lithium ion battery enters large-scale operational phase thereupon, the research of lithium ion battery is also towards future developments such as high magnification, high circulation, high power capacity, power lithium-ion rechargeable battery is widely used in the fields such as notebook, digital product, mine lamp, electric bicycle, electric tool, and demand is very large.
At present in power lithium-ion rechargeable battery industry, lithium ion battery circulates after 300 weeks at normal temperature, capability retention is between 80% to 95%, electrolyte each component ratio in actual production process is not optimized through series, has the problem that the scope of application is little, conductance is low, wettability is poor, high temperature cyclic performance is poor.
Summary of the invention
Object of the present invention aims to provide a kind of electrolyte of power lithium-ion rechargeable battery, have applied widely, conductance is high, wettability good, the feature of good cycle.
For achieving the above object, the electrolyte of power lithium-ion rechargeable battery of the present invention is by electrolyte, main solvent and additive are formulated by mass percentage, electrolyte consists of lithium hexafluoro phosphate 5~15% and dioxalic acid lithium borate (LIBOB) 1~10%, main solvent is by dimethyl carbonate (DMC) 25.0%~35.0%, methyl ethyl carbonate (EMC) 5.0%~15.0%, ethylene carbonate (EC) 3.0%~10.0% and propene carbonate (PC) 2.0%~8.0% form, additive is by ethylene sulfite (ES) 1%~3%, vinylene carbonate (VC) 1%~3%, 1, 3-propane sultone (PS) 0.5%~2.0%, methyl phenyl ethers anisole 0.1%~0.5%, biphenyl (BP) 0.5%~2.0%, adiponitrile 0.01%~2%, 1-4-fourth diester (GBL) 0.5%~2.0% and cyclohexyl benzene (CHB) 0.5~2.0% form.
Process for preparation is as follows:
1, by dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and propene carbonate (PC) respectively by rectifying, remove impurity and purification, then by pipeline, beat in measuring tank respectively, measuring tank self has the function calculating the weight;
2, by dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and propene carbonate (PC) according to mass percent, after measuring by measuring tank respectively, successively dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC), propene carbonate (PC) are inserted in reactor, stir at normal temperatures 0.5~1 hour, it is evenly mixed, in whipping process, need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water content, water content should be lower than 10ppm;
3, by lithium hexafluoro phosphate according to mass percent, after measuring by measuring tank, add in reactor, stir 1 hour, again by dioxalic acid lithium borate (LIBOB) according to mass percent, after measuring by measuring tank, add in reactor, stir 1.5~2.5 hours, mix, in whipping process, also need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water and fluohydric acid content, water content is lower than 10ppm, and hydrofluoric acid (HF) content is lower than 20ppm;
4, by 1, 3-propane sultone (PS), methyl phenyl ethers anisole, biphenyl, cyclohexyl benzene (CHB), 1-4-fourth diester (GBL), adiponitrile, ethylene sulfite (ES), vinylene carbonate (VC) is according to mass percent, after measuring by measuring tank respectively, successively by 1, 3-propane sultone (PS), methyl phenyl ethers anisole, biphenyl, cyclohexyl benzene (CHB), 1-4-fourth diester (GBL), adiponitrile, ethylene sulfite (ES), vinylene carbonate (VC) adds in reactor, stir 0.5~2 hour, fully mix, in whipping process, also need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water and fluohydric acid content, water content is lower than 10ppm, hydrofluoric acid (HF) content is lower than 20ppm, form the electrolyte of power lithium-ion rechargeable battery.
The electrolyte of a kind of power lithium-ion rechargeable battery of the present invention compared with prior art has following excellent effect.
Adopt the electrolyte of power lithium-ion rechargeable battery of the present invention, electrolyte prescription has been optimized electrolyte solvent system, the mass percent of each component of additive, increased accordingly and overcharged, film forming, wetability, the application of compound lithium salts, circulation and the security performance of battery have been improved, battery core circulates after 500 weeks at normal temperature, capability retention reaches 88% to 96%, the highest normal temperature cycle life can reach (capability retention calculates by 60%) 2000 times, and electrolyte solvent adopts quaternary system, can be applied to multiple positive electrode system, as cobalt acid lithium, nickel bores LiMn2O4, the doping system of nickle cobalt lithium manganate and LiMn2O4, pure LiMn2O4 system, negative pole can be Delanium and native graphite, expands the scope of application of electrolyte, improves fluid injection efficiency, can slow down the Jahn-Teller effect of LiMn2O4, there is the gentle high rate performance of good height, security performance aspect, in the situation that guaranteeing reservoir quantity, 1C/12V and 3C/4.65V overcharge and can pass through smoothly, and short circuit, 130 ℃ of bakings are had to great improvement.
Embodiment
Below the electrolyte of power lithium-ion rechargeable battery of the present invention is further described.
The electrolyte of a kind of power lithium-ion rechargeable battery of the present invention, by electrolyte, main solvent and additive are formulated according to mass percent, electrolyte is formulated by lithium hexafluoro phosphate 5~15% and dioxalic acid lithium borate (LIBOB) 1~10%, main solvent is by dimethyl carbonate (DMC) 25.0%~35.0%, methyl ethyl carbonate (EMC) 5.0%~15.0%, ethylene carbonate (EC) 3.0%~10.0% and propene carbonate (PC) 2.0%~8.0% are formulated, additive is by ethylene sulfite (ES) 1%~3%, vinylene carbonate (VC) 1%~3%, 1, 3-propane sultone (PS) 0.5%~2.0%, methyl phenyl ethers anisole 0.1%~0.5%, biphenyl (BP) 0.5%~2.0%, adiponitrile 0.01%~2%, 1-4-fourth diester (GBL) 0.5%~2.0% and cyclohexyl benzene (CHB) 0.5~2.0% are formulated.
1, by dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and propene carbonate (PC) respectively by rectifying, remove impurity and purification, then by pipeline, play metering respectively in measuring tank respectively, measuring tank self has the function calculating the weight;
2, by dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and propene carbonate (PC) according to mass percent, after measuring by measuring tank respectively, successively dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC), propene carbonate (PC) are inserted in reactor, stir at normal temperatures 0.5~1 hour, it is evenly mixed, in whipping process, need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water content, water content should be lower than 10ppm;
3, by lithium hexafluoro phosphate according to mass percent, after measuring by measuring tank, add in reactor, stir 1 hour, again by dioxalic acid lithium borate (LIBOB) according to mass percent, after measuring by measuring tank, add in reactor, stir 1.5~2.5 hours, mix, in whipping process, also need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water and fluohydric acid content, water content is lower than 10ppm, and hydrofluoric acid (HF) content is lower than 20ppm;
4, by 1, 3-propane sultone (PS), methyl phenyl ethers anisole, biphenyl, cyclohexyl benzene (CHB), 1-4-fourth diester (GBL), adiponitrile, ethylene sulfite (ES), vinylene carbonate (VC) is according to mass percent, after measuring by measuring tank respectively, successively by 1, 3-propane sultone (PS), methyl phenyl ethers anisole, biphenyl, cyclohexyl benzene (CHB), 1-4-fourth diester (GBL), adiponitrile, ethylene sulfite (ES), vinylene carbonate (VC) adds in reactor, stir 0.5~2 hour, fully mix, in whipping process, also need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water and fluohydric acid content, water content is lower than 10ppm, hydrofluoric acid (HF) content is lower than 20ppm, form the electrolyte of power lithium-ion rechargeable battery, it is inner that formulated electrolyte injects battery core.
Embodiment 1:
The electrolyte of a kind of power lithium-ion rechargeable battery of the present invention, by electrolyte, main solvent and additive are formulated, electrolyte consists of lithium hexafluoro phosphate 8~13% and dioxalic acid lithium borate (LIBOB) 3~7%, main solvent is by dimethyl carbonate (DMC) 28.0%~32.0%, methyl ethyl carbonate (EMC) 8.0%~13.0%, ethylene carbonate (EC) 5.0%~8.0% and propene carbonate (PC) 4.0%~6.0% form, additive is by ethylene sulfite (ES) 1.5%~2.5%, vinylene carbonate (VC) 1.5%~2.5%, 1, 3-propane sultone (PS) 0.8%~1.5%, methyl phenyl ethers anisole 0.2%~0.4%, biphenyl (BP) 0.8%~1.5%, adiponitrile 0.01%~1.5%, 1-4-fourth diester (GBL) 0.8%~1.5% and cyclohexyl benzene (CHB) 0.8~1.5% form.
Embodiment 2:
The electrolyte of a kind of power lithium-ion rechargeable battery of the present invention, by electrolyte, main solvent and additive are formulated, electrolyte consists of lithium hexafluoro phosphate 10~11% and dioxalic acid lithium borate (LIBOB) 4~8%, main solvent is by dimethyl carbonate (DMC) 30%, methyl ethyl carbonate (EMC) 10~11%, ethylene carbonate (EC) 6.0%~9.0% and propene carbonate (PC) 5.0%~7.0% form, additive is by ethylene sulfite (ES) 2%, vinylene carbonate (VC) 2%, 1, 3-propane sultone (PS) 1.0%, methyl phenyl ethers anisole 0.3%, biphenyl (BP) 1.0%, adiponitrile 0.01%~1%, 1-4-fourth diester (GBL) 1.0% and cyclohexyl benzene (CHB) 1.0% form.
Embodiment 3: the electrolyte of a kind of power lithium-ion rechargeable battery of the present invention, by electrolyte, main solvent and additive are formulated, electrolyte consists of lithium hexafluoro phosphate 10% and dioxalic acid lithium borate (LIBOB) 8%, main solvent is by dimethyl carbonate (DMC) 35%, methyl ethyl carbonate (EMC) 11%, ethylene carbonate (EC) 9.0% and propene carbonate (PC) 7.0% form, additive is by ethylene sulfite (ES) 2%, vinylene carbonate (VC) 2%, 1, 3-propane sultone (PS) 1.0%, methyl phenyl ethers anisole 0.3%, biphenyl (BP) 1.0%, adiponitrile 1%, 1-4-fourth diester (GBL) 1.0% and cyclohexyl benzene (CHB) 1.0% form.
Claims (4)
1. the electrolyte of a power lithium-ion rechargeable battery, by electrolyte, main solvent and additive are formulated according to mass percent, it is characterized in that electrolyte consists of lithium hexafluoro phosphate 5~15% and dioxalic acid lithium borate (LIBOB) 1~10%, main solvent is by dimethyl carbonate (DMC) 25.0%~35.0%, methyl ethyl carbonate (EMC) 5.0%~15.0%, ethylene carbonate (EC) 3.0%~10.0% and propene carbonate (PC) 2.0%~8.0% form, additive is by ethylene sulfite (ES) 1%~3%, vinylene carbonate (VC) 1%~3%, 1, 3-propane sultone (PS) 0.5%~2.0%, methyl phenyl ethers anisole 0.1%~0.5%, biphenyl (BP) 0.5%~2.0%, adiponitrile 0.01%~2%, 1-4-fourth diester (GBL) 0.5%~2.0% and cyclohexyl benzene (CHB) 0.5~2.0% form, process for preparation is as follows:
(1), by dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and propene carbonate (PC) respectively by rectifying, remove impurity and purification, then by pipeline, beat in measuring tank respectively, measuring tank self has the function calculating the weight;
(2), by dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC) and propene carbonate (PC) according to mass percent, after measuring by measuring tank respectively, successively dimethyl carbonate (DMC), methyl ethyl carbonate (EMC), ethylene carbonate (EC), propene carbonate (PC) are inserted in reactor, stir at normal temperatures 0.5~1 hour, it is evenly mixed, in whipping process, need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water content, water content should be lower than 10ppm;
(3), by lithium hexafluoro phosphate according to mass percent, after measuring by measuring tank, add in reactor, stir 1 hour, again by dioxalic acid lithium borate (LIBOB) according to mass percent, after measuring by measuring tank, add in reactor, stir 1.5~2.5 hours, mix, in whipping process, also need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water and fluohydric acid content, water content is lower than 10ppm, and hydrofluoric acid (HF) content is lower than 20ppm;
(4), by 1, 3-propane sultone (PS), methyl phenyl ethers anisole, biphenyl, cyclohexyl benzene (CHB), 1-4-fourth diester (GBL), adiponitrile, ethylene sulfite (ES), vinylene carbonate (VC) is according to mass percent, after measuring by measuring tank respectively, successively by 1, 3-propane sultone (PS), methyl phenyl ethers anisole, biphenyl, cyclohexyl benzene (CHB), 1-4-fourth diester (GBL), adiponitrile, ethylene sulfite (ES), vinylene carbonate (VC) adds in reactor, stir 0.5~2 hour, fully mix, in whipping process, also need argon gas (purity is greater than 99.999%) protection, protection air pressure is 1.02~1.08MPa, monitoring water and fluohydric acid content, water content is lower than 10ppm, hydrofluoric acid (HF) content is lower than 20ppm, form the electrolyte of power lithium-ion rechargeable battery.
2. the electrolyte of a kind of power lithium-ion rechargeable battery according to claim 1, it is characterized in that electrolyte consists of lithium hexafluoro phosphate 8~13% and dioxalic acid lithium borate (LIBOB) 3~7%, main solvent is by dimethyl carbonate (DMC) 28.0%~32.0%, methyl ethyl carbonate (EMC) 8.0%~13.0%, ethylene carbonate (EC) 5.0%~8.0% and propene carbonate (PC) 4.0%~6.0% form, additive is by ethylene sulfite (ES) 1.5%~2.5%, vinylene carbonate (VC) 1.5%~2.5%, 1, 3-propane sultone (PS) 0.8%~1.5%, methyl phenyl ethers anisole 0.2%~0.4%, biphenyl (BP) 0.8%~1.5%, adiponitrile 0.01%~1.5%, 1-4-fourth diester (GBL) 0.8%~1.5% and cyclohexyl benzene (CHB) 0.8~1.5% form.
3. the electrolyte of a kind of power lithium-ion rechargeable battery according to claim 1, it is characterized in that electrolyte consists of lithium hexafluoro phosphate 10~11% and dioxalic acid lithium borate (LIBOB) 4~8%, main solvent is by dimethyl carbonate (DMC) 30%, methyl ethyl carbonate (EMC) 10~11%, ethylene carbonate (EC) 6.0%~9.0% and propene carbonate (PC) 5.0%~7.0% form, additive is by ethylene sulfite (ES) 2%, vinylene carbonate (VC) 2%, 1, 3-propane sultone (PS) 1.0%, methyl phenyl ethers anisole 0.3%, biphenyl (BP) 1.0%, adiponitrile 0.01%~1%, 1-4-fourth diester (GBL) 1.0% and cyclohexyl benzene (CHB) 1.0% form.
4. the electrolyte of a kind of power lithium-ion rechargeable battery according to claim 1, it is characterized in that electrolyte consists of lithium hexafluoro phosphate 10% and dioxalic acid lithium borate (LIBOB) 8%, main solvent is by dimethyl carbonate (DMC) 35%, methyl ethyl carbonate (EMC) 11%, ethylene carbonate (EC) 9.0% and propene carbonate (PC) 7.0% form, additive is by ethylene sulfite (ES) 2%, vinylene carbonate (VC) 2%, 1, 3-propane sultone (PS) 1.0%, methyl phenyl ethers anisole 0.3%, biphenyl (BP) 1.0%, adiponitrile 1%, 1-4-fourth diester (GBL) 1.0% and cyclohexyl benzene (CHB) 1.0% form.
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Cited By (9)
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CN105552429A (en) * | 2016-01-29 | 2016-05-04 | 长沙理工大学 | Overcharge-prevention lithium ion battery electrolyte and lithium ion battery |
CN105633463A (en) * | 2016-01-08 | 2016-06-01 | 九江迅通新能源科技有限公司 | Lithium-ion secondary battery electrolyte applicable to low-temperature environment discharging |
CN106159326A (en) * | 2016-08-26 | 2016-11-23 | 江苏天鹏电源有限公司 | A kind of Multifunctional electrolysis liquid |
CN109346768A (en) * | 2018-09-30 | 2019-02-15 | 东莞市杉杉电池材料有限公司 | A kind of manganate lithium ion battery nonaqueous electrolytic solution |
CN109806831A (en) * | 2019-03-18 | 2019-05-28 | 泰顺永庆电力技术有限公司 | The preparation process of lithium battery energy storage battery material |
CN110233291A (en) * | 2019-05-31 | 2019-09-13 | 骆驼集团新能源电池有限公司 | A kind of wide temperate zone lithium battery electrolytes of 12V start and stop balancing high/low temperature |
CN111416151A (en) * | 2020-03-20 | 2020-07-14 | 宁德新能源科技有限公司 | Electrolyte solution, electrochemical device, and electronic device |
CN112382791A (en) * | 2020-11-24 | 2021-02-19 | 河南省法恩莱特新能源科技有限公司 | Electrolyte for TWS Bluetooth headset lithium ion battery, preparation method of electrolyte and lithium ion battery |
CN113921914A (en) * | 2021-09-30 | 2022-01-11 | 宁德新能源科技有限公司 | Electrolyte solution, and electrochemical device and electronic device using same |
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CN105633463A (en) * | 2016-01-08 | 2016-06-01 | 九江迅通新能源科技有限公司 | Lithium-ion secondary battery electrolyte applicable to low-temperature environment discharging |
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CN105552429A (en) * | 2016-01-29 | 2016-05-04 | 长沙理工大学 | Overcharge-prevention lithium ion battery electrolyte and lithium ion battery |
CN106159326A (en) * | 2016-08-26 | 2016-11-23 | 江苏天鹏电源有限公司 | A kind of Multifunctional electrolysis liquid |
CN109346768A (en) * | 2018-09-30 | 2019-02-15 | 东莞市杉杉电池材料有限公司 | A kind of manganate lithium ion battery nonaqueous electrolytic solution |
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CN110233291A (en) * | 2019-05-31 | 2019-09-13 | 骆驼集团新能源电池有限公司 | A kind of wide temperate zone lithium battery electrolytes of 12V start and stop balancing high/low temperature |
CN111416151A (en) * | 2020-03-20 | 2020-07-14 | 宁德新能源科技有限公司 | Electrolyte solution, electrochemical device, and electronic device |
CN112382791A (en) * | 2020-11-24 | 2021-02-19 | 河南省法恩莱特新能源科技有限公司 | Electrolyte for TWS Bluetooth headset lithium ion battery, preparation method of electrolyte and lithium ion battery |
CN113921914A (en) * | 2021-09-30 | 2022-01-11 | 宁德新能源科技有限公司 | Electrolyte solution, and electrochemical device and electronic device using same |
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