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Lithium-ion battery electrolyte with high energy density and high safety and lithium-ion battery

A lithium-ion battery, high energy density technology, applied in secondary batteries, circuits, electrical components, etc., to achieve the effect of improving anti-overcharge performance, improving interface properties, and improving cycle stability

Active Publication Date: 2019-08-20
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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  • Lithium-ion battery electrolyte with high energy density and high safety and lithium-ion battery
  • Lithium-ion battery electrolyte with high energy density and high safety and lithium-ion battery
  • Lithium-ion battery electrolyte with high energy density and high safety and lithium-ion battery

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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

The invention relates to a lithium-ion battery electrolyte with high energy density and high safety and a lithium-ion battery, and belongs to the technical field of lithium-ion batteries. The lithium-ion battery electrolyte with high energy density and high safety includes an additive Y and an S=O containing compound, wherein the structural formula of the additive Y is shown in the formula I defined in the description, and R1, R2 are independently one of substituted or unsubstituted C1-6 alkyl and alkoxy. The invention further discloses a lithium-ion battery. The invention belongs to the technical field of lithium-ion batteries, and has the advantage of solving the problem of cycle and safety performance of the lithium-ion batteries with high energy density.

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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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
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