SECONDARY BATTERY - ZHANGJIAGANG GUOTAI HUARONG NEW CHEMICAL MATERIALS CO LTD

Title:

SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2021/121222

Kind Code:

A1

Abstract:

Disclosed is a secondary battery, comprising a positive electrode, a negative electrode, and an electrolyte, wherein the electrolyte comprises a lithium salt, an organic solvent, and an additive, wherein the additive comprises a fluorinated compound that accounts for 5-20% of the total mass of the electrolyte, and a polynitrile compound that accounts for 0.2-4% of the total mass of the electrolyte and a sulfate compound that accounts for 0.3-5% of the total mass of the electrolyte; and the negative electrode has a compacted density of not less than 1.55 g/cm3. When the secondary battery is used, the battery can still have both a high temperature characteristic and a low temperature charging ability under the conditions of a higher negative electrode density, thereby having market application prospects, and overcoming the problem of the performance of existing secondary batteries deteriorating when the compacted density of a negative electrode is improved.

Inventors:

WANG FENG (CN)
LU XIAOFENG (CN)
CHEN XIAOQIN (CN)
GAN CHAOLUN (CN)

Application Number:

PCT/CN2020/136483

Publication Date:

June 24, 2021

Filing Date:

December 15, 2020

Export Citation:

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Assignee:

ZHANGJIAGANG GUOTAI HUARONG NEW CHEMICAL MATERIALS CO LTD (CN)

International Classes:

H01M10/0567

Foreign References:

CN105552439A	2016-05-04
CN109301322A	2019-02-01
CN109301326A	2019-02-01
CN106058317A	2016-10-26

Other References: