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A kind of lithium-ion battery electrolyte solution and lithium-ion battery with high energy density and high safety

A lithium-ion battery, high energy density technology, applied in the direction of secondary batteries, circuits, electrical components, etc., to achieve the effects of ensuring safety, improving interface properties, and improving cycle stability

Active Publication Date: 2021-05-11
ZHUHAI COSMX BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of the electrical performance and safety performance of the existing high-energy-density lithium-ion batteries, and provide a high-energy-density and high-safety lithium-ion battery electrolyte and a lithium-ion battery. The cycle performance of the battery, and has a high safety performance

Method used

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  • A kind of lithium-ion battery electrolyte solution and lithium-ion battery with high energy density and high safety
  • A kind of lithium-ion battery electrolyte solution and lithium-ion battery with high energy density and high safety
  • A kind of lithium-ion battery electrolyte solution and lithium-ion battery with high energy density and high safety

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specific Embodiment approach 1

[0012] Specific embodiment 1: This embodiment describes a high-energy-density and high-safety lithium-ion battery electrolyte, including organic solvents, additives and lithium salts, and the additives include additive Y and compounds containing S=O; the The structural formula of additive Y is as shown in (1):

[0013]

[0014] Among them, R 1 , R 2 independently of each other as C 1～6 Alkyl, alkoxy, substituted C 1～6 Any of alkyl or substituted alkoxy, specifically, substituted C 1～6 Alkyl or substituted alkoxy refers to C 1～6 The hydrogen on the alkyl or alkoxy group is replaced by other elements.

specific Embodiment approach 2

[0015] Specific embodiment two: a kind of high-energy-density high-safety lithium-ion battery electrolyte described in specific embodiment one, the additive Y is preferably one of the following substances:

[0016]

specific Embodiment approach 3

[0017] Embodiment 3: The high-energy-density and high-safety lithium-ion battery electrolyte described in Embodiment 1, the amount of the additive Y accounts for 0.01% to 8% of the total weight of the electrolyte.

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Abstract

A lithium ion battery electrolyte with high energy density and high safety and a lithium ion battery belong to the technical field of lithium ion batteries. The high-energy density and high-safety lithium-ion battery electrolyte includes an additive Y and a compound containing S=O, and the additive Y is shown in structural formula I, wherein R 1 , R 2 each independently substituted or unsubstituted C 1～6 Any one of the alkyl group and the alkoxy group also discloses a lithium ion battery. The invention belongs to the technical field of lithium ion batteries and has the advantage of solving the problems of cycle and safety performance of high energy density lithium ion batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to an electrolyte solution and a lithium ion battery with high energy density and high safety. Background technique [0002] At present, lithium-ion batteries have been widely used in daily life, such as mobile phones, notebook computers, electric vehicles, artificial intelligence and other fields. This is due to the advantages of lithium-ion, such as good cycle performance, high working voltage and environmental friendliness. But the need for increased energy density in lithium-ion batteries is a constant topic. Therefore, high-nickel cathode materials and silicon-carbon anode materials with higher capacity are currently the main direction to increase energy density. However, high-nickel cathode materials and silicon-carbon anode materials have poor cycle stability and safety performance. [0003] The use of additives in the electrolyte is a powerful mea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/0525H01M10/0567
CPCH01M10/0525H01M10/0567Y02E60/10
Inventor 廖波李素丽王海徐延铭李俊义
Owner ZHUHAI COSMX BATTERY CO LTD