Electrolyte capable of inhibiting gas production of lithium-ion battery

A lithium-ion battery and electrolyte technology, applied in the field of lithium-ion batteries, can solve problems affecting the fluency of lithium-ion batteries, affecting battery cycle performance, and reducing industrial production capacity, so as to suppress battery gas production, improve cycle performance, and improve industrial production capacity. The effect of capacity

Inactive Publication Date: 2018-09-18
TIANJIN ENERGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Disadvantages of the prior art: the lithium-ion battery produces a lot of gas during the pre-charging process, which seriously affects the smoothness of the industrial production of the lithium-ion battery and greatly reduces the industrial production capacity; Cycle performance and other performance

Method used

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  • Electrolyte capable of inhibiting gas production of lithium-ion battery

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Comparison scheme
Effect test

Embodiment 1

[0024] A kind of electrolytic solution that suppresses lithium-ion battery to produce gas, and this electrolytic solution comprises lithium salt, organic solvent; Described lithium salt is the lithium tetrafluoroborate of 0.5mol / L, the lithium hexafluorophosphate of 0.5mol / L and the lithium hexafluorophosphate of 0.1mol / L A combination of lithium bisfluorosulfonyl imide, the organic solvent is a combination of propylene carbonate, ethylene carbonate, ethyl methyl carbonate, diethyl carbonate and di-n-propyl carbonate, propylene carbonate, ethylene carbonate, ethyl methyl carbonate The volume ratio of ester, diethyl carbonate and di-n-propyl carbonate is 10:60:15:10:5. The above-mentioned electrolyte vegetation was used to obtain a lithium-ion battery, and the gas production of the lithium-ion battery during the pre-charging process and the remaining capacity rate of the 1C cycle for 500 cycles at 45°C were detected.

Embodiment 2

[0026] A kind of electrolytic solution that suppresses lithium-ion battery gas production, this electrolytic solution comprises lithium salt, organic solvent and additive; Described additive is 1.1mol / L lithium difluorooxalate borate, 0.5mol / L lithium tetrafluorooxalate phosphate and 1.2 The combination of mol / L lithium difluorophosphate, the lithium salt is a combination of 0.5mol / L lithium tetrafluoroborate, 0.5mol / L lithium hexafluorophosphate and 0.1mol / L lithium bisfluorosulfonimide, and the organic solvent is propylene carbonate Combination of ester, ethylene carbonate, butylene carbonate, ethyl methyl carbonate, dimethyl carbonate and diethyl carbonate, propylene carbonate, ethylene carbonate, butylene carbonate, ethyl methyl carbonate, dimethyl carbonate The volume ratio to diethyl carbonate is 10:60:4:11:10:5. The above-mentioned electrolyte vegetation was used to obtain a lithium-ion battery, and the gas production of the lithium-ion battery during the pre-charging p...

Embodiment 3

[0028] A kind of electrolytic solution that suppresses lithium-ion battery gas production, this electrolytic solution comprises lithium salt, organic solvent and additive; Described additive is 0.2mol / L1,3-propane sultone, 0.3mol / L ethylene sulfate, 0.5mol / L ethylene carbonate, 0.1mol / L propylene sulfite, 0.2mol / L vinylene carbonate, 0.05mol / L1,4 butane sultone and 0.5mol / L fluoroethylene carbonate The combination, organic solvent is the combination of ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate, the volume ratio of ethylene carbonate, ethyl methyl carbonate, dimethyl carbonate, diethyl carbonate is 60 :14:16:10, the lithium salt is a combination of 0.1mol / L lithium hexafluoroarsenate, 0.3mol / L lithium tetrafluoroborate, 0.6mol / L lithium hexafluorophosphate and 0.2mol / L lithium bisfluorosulfonimide. The above-mentioned electrolyte vegetation was used to obtain a lithium-ion battery, and the gas production of the lithium-ion battery during ...

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Abstract

The invention provides an electrolyte capable of inhibiting gas production of a lithium-ion battery. The electrolyte comprises a lithium salt, an organic solvent and an additive, wherein the additiveis one or a composition of more of lithium difluoroborate, tetrafluoroethylene oxalic acid phosphate lithium, 1,3-propanesulfonate, ethylene sulfate, vinylethylene carbonate, propylene sulfite, vinylene carbonate, 1,4-butane sulfonate lactone, tris(trimethylsilyl) phosphate, fluoroethylene carbonate and lithium difluorophosphate. According to the electrolyte capable of inhibiting gas production ofthe lithium-ion battery, an excellent CEI/SEI film can be formed on the surface of an electrode of the lithium-ion battery, and gas production caused by direct contact of the electrode of the lithium-ion battery and an electrolyte solvent can be well prevented in the pre-charge process, so that gas production of the lithium-ion battery in the pre-charge process can be well inhibited.

Description

technical field [0001] The invention belongs to the field of lithium ion batteries, in particular to an electrolyte for suppressing gas production of lithium ion batteries. Background technique [0002] As the hottest new energy method in the current new energy field - lithium-ion battery, its research and development and production have always attracted the attention of lithium battery companies and lithium battery engineers. At present, lithium-ion batteries are widely used in the field of power and energy storage. While meeting performance indicators such as high energy density, long cycle life, and high safety, how to improve the convenience of its manufacturing process? (Especially the problem of gas production) has always been a matter of great concern to the industry. [0003] Graphite materials are the most common anode materials for lithium-ion batteries. At present, amorphous carbon coating treatment is generally performed on the surface of anode materials to redu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0567H01M10/0525
CPCH01M10/0525H01M10/0567H01M2300/0025Y02E60/10
Inventor 从长杰冯树南马华王驰伟李娜
Owner TIANJIN ENERGIES
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