Title:
METHOD FOR IMPROVING SOLUBILITY OF LITHIUM SALT OF NOVEL FLAME-RETARDANT ELECTROLYTE IN ORGANIC SOLVENT
Document Type and Number:
WIPO Patent Application WO/2021/138921
Kind Code:
A1
Abstract:
A method for improving the solubility of a lithium salt of a flame-retardant electrolyte in an organic solvent. The flame-retardant electrolyte which can be easily dissolved in the organic solvent is prepared by substituting an alkylaromatic oxygen group for partial chlorine of hexachlorocyclotriphosphazene (HCCP), substituting phosphite for residual chlorine, and hydrolyzing to obtain partially aromatic substituted cyclotriphosphazene lithium phosphate [(R-Ar-O) x(-CP-) 3(PO 3Li 2) 6-x], ((-CP-) 3 being a cyclotriphosphazene ring and x being a positive integer from 1 to 5); and compounding [(R-Ar-O) x(-CP-) 3(PO 3Li 2) 6-x] and [(R-Ar-O) x(-CP-) 3(PO 3R' 2) 6-x] according to the mass ratio of 10:1-1:1 and dissolving in an organic solvent according to the amount of 6%-48%, so that the flame-retardant electrolyte is obtained. The electrolyte has good lithium ion conductivity and good flame retardance and is applicable to various lithium 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/CN2020/071572
Publication Date:
July 15, 2021
Filing Date:
January 11, 2020
Export Citation:
Assignee:
UNIV SHANDONG TECHNOLOGY (CN)
International Classes:
H01M10/0567
Domestic Patent References:
| WO2019088097A1 | 2019-05-09 |
Foreign References:
| CN110380118A | 2019-10-25 | |||
| CN110265702A | 2019-09-20 | |||
| CN105119013A | 2015-12-02 | |||
| CN102751534A | 2012-10-24 |
Attorney, Agent or Firm:
QINGDAO FIRST PATENT & TRADEMARK AGENT CO., LTD. (CN)
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