Title:
PREPARATION METHOD FOR FLAME-RETARDANT LITHIUM ION BATTERY ELECTROLYTE EASY TO DISSOLVE IN ORGANIC SOLVENT
Document Type and Number:
WIPO Patent Application WO/2021/138922
Kind Code:
A1
Abstract:
A lithium salt easy to dissolve in an organic solvent and having a flame-retardant function, and a flame-retardant electrolyte of a lithium ion battery having same. The lithium salt is poly(lithium phosphate)phosphazene partially substituted by (alkylaroxy), and the structural general formula of the lithium salt is: [(R-Ar-O)x(P=N)n(Li2O3P)2n-x]. The novel flame-retardant electrolyte is formed by compounding the lithium salt and a phosphate ester intermediate [(R-Ar-O)x(P=N)n(R'2O3P)2n-x] of the lithium salt according to a mass ratio of 10:1-1:1. The electrolyte is easy to dissolve in an organic solvent. The electrolyte is prepared according to the amount of 8-45%, and thus the novel flame-retardant electrolyte can be obtained. The electrolyte has good lithium ion conductivity and good flame-retardant performance, and is applied to lithium ion batteries, lithium-sulfur batteries, lithium fluorinated carbon batteries or lithium-oxygen batteries.
Inventors:
LI ZHONGFANG (CN)
SUN PENG (CN)
CUI WEIHUI (CN)
WANG CHUANGANG (CN)
GUO HUI (CN)
WANG YAN (CN)
SUN PENG (CN)
CUI WEIHUI (CN)
WANG CHUANGANG (CN)
GUO HUI (CN)
WANG YAN (CN)
Application Number:
PCT/CN2020/071575
Publication Date:
July 15, 2021
Filing Date:
January 11, 2020
Export Citation:
Assignee:
UNIV SHANDONG TECHNOLOGY (CN)
International Classes:
H01M10/0566; H01M10/0567
Foreign References:
| CN109762023A | 2019-05-17 | |||
| CN105161764A | 2015-12-16 | |||
| CN106159327A | 2016-11-23 | |||
| CN103762380A | 2014-04-30 | |||
| CN106229548A | 2016-12-14 | |||
| CN102916222A | 2013-02-06 | |||
| CN110380118A | 2019-10-25 | |||
| EP3544109A1 | 2019-09-25 |
Attorney, Agent or Firm:
QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (CN)
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