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1. CN112448029 - 一种锂二次电池用电解液和包括该电解液的锂二次电池

Office
China
Application Number 201910804026.4
Application Date 28.08.2019
Publication Number 112448029
Publication Date 05.03.2021
Publication Kind A
IPC
H01M 10/0567
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
056characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
0564the electrolyte being constituted of organic materials only
0566Liquid materials
0567characterised by the additives
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
CPC
H01M 10/0525
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
0525Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
H01M 10/0567
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
056characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
0564the electrolyte being constituted of organic materials only
0566Liquid materials
0567characterised by the additives
Applicants 珠海冠宇电池股份有限公司
Inventors 廖波
李素丽
徐延铭
李俊义
Agents 北京知元同创知识产权代理事务所(普通合伙) 11535
北京知元同创知识产权代理事务所(普通合伙) 11535
Title
(ZH) 一种锂二次电池用电解液和包括该电解液的锂二次电池
Abstract
(ZH)
本发明提供一种锂二次电池用电解液和包括该电解液的锂二次电池,所述锂二次电池用电解质中包括有机溶剂、锂盐和至少一种具有式(I)所示结构式的添加剂,其中,式(I)所示的添加剂能够在锂二次电池第一次充电时在正负极表面形成含锂的—PF2型化合物,该化合物具有强稳定性和高锂离子的特性,能够显著提高电池低温充电和高温性能。同时,本发明提出的式(I)所示的添加剂中具有合理的F元素含量,可以显著抑制电极表面LiF的形成,降低了界面阻抗,提高锂离子的充放电可逆性。

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