Non-aqueous electrolyte for lithium ion battery with ternary positive electrode material and negative silicon-oxygen-carbon composite negative electrode material

A non-aqueous electrolyte and lithium-ion battery technology, applied in non-aqueous electrolytes, electrolytes, secondary batteries, etc., can solve problems such as high-temperature gas production/battery voltage drop, electrolyte interface damage, etc.
CN113299996APending Publication Date: 2021-08-24KUNSHAN SYNERGY SCIENTECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
KUNSHAN SYNERGY SCIENTECH CO LTD
Publication Date
2021-08-24

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Abstract

The invention belongs to the field of lithium ion batteries, and discloses a non-aqueous electrolyte for a lithium ion battery with a ternary positive electrode material and a negative silicon-oxygen-carbon composite negative electrode material, which comprises a non-aqueous organic solvent, an electrolyte lithium salt and an electrolyte additive; the non-aqueous organic solvent comprises ethylene carbonate and methyl ethyl carbonate; and the electrolyte additives comprise vinylene carbonate, fluoroethylene carbonate, 1, 3-propane sultone, vinylethylene carbonate and lithium difluorophosphate. The non-aqueous electrolyte contains cyclic carbonate, a negative electrode film-forming agent, a positive electrode film-forming agent and three lithium salts. The lithium ion non-aqueous electrolyte can be applied to improvement of high-temperature and normal-temperature cycle performance.
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Description

technical field

[0001] The invention belongs to the field of lithium electronic batteries, and discloses a non-aqueous electrolyte solution for a lithium-ion battery with a ternary positive electrode material and a negative electrode silicon-oxygen-carbon composite negative electrode material. The non-aqueous electrolyte contains cyclic carbonate and negative electrode film-forming agent, positive electrode film-forming agent and three kinds of lithium salts. Background technique

[0002] Lithium-ion batteries have been widely used in modern people's lives due to their advantages of portability, excellent cycle performance and low self-discharge. A lithium-ion battery is mainly composed of a positive electrode, a negative electrode, a separator, and a non-aqueous electrolyte. The positive part is mainly composed of lithium cobalt oxide. The negative electrode material is mainly graphite system.

[0003] In order to increase the energy density of lithium-ion batteries, the...

Claims

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