Title:
PREPARATION METHOD FOR LITHIUM BIS(FLUOROSULFONYL)IMIDE, AND LITHIUM ION BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/202093
Kind Code:
A1
Abstract:
The present invention relates to the technical field of lithium ion battery electrolytes, in particular to a preparation method for lithium bis(fluorosulfonyl)imide, and a lithium ion battery. The preparation method for lithium bis(fluorosulfonyl)imide comprises: mixing bis(chlorosulfonyl)imide, a fluoride salt, and a non-aqueous solvent for reaction, and after the reaction is completed, separating and purifying to obtain a bis(fluorosulfonyl)imide solution; and mixing a lithium source and the bis(fluorosulfonyl)imide solution, and after the reaction is completed, separating and purifying to obtain lithium bis(fluorosulfonyl)imide, the fluoride salt comprising at least one of ammonium fluoride, sodium fluoride, and potassium fluoride. The method has a short process flow, less waste in the reaction process, and as the reaction is carried out in a non-aqueous system, the ability to avoid the introduction of water vapor.
Inventors:
LIU JIANWEN (CN)
LIU SHIQI (CN)
WANG SHIQUAN (CN)
LIU SHIQI (CN)
WANG SHIQUAN (CN)
Application Number:
PCT/CN2022/137483
Publication Date:
October 26, 2023
Filing Date:
December 08, 2022
Export Citation:
Assignee:
HUBEI WANRUN NEW ENERGY TECH CO LTD (CN)
International Classes:
C01B21/086
Foreign References:
| CN114590785A | 2022-06-07 | |||
| CN107226461A | 2017-10-03 | |||
| CN105731398A | 2016-07-06 | |||
| CN109941978A | 2019-06-28 | |||
| CN109734061A | 2019-05-10 | |||
| US20130331609A1 | 2013-12-12 |
Other References:
JIA-QIAO JIANG, JI WEN-JIN; SU XIAO-HUI: "Study on preparation of LiFSI using fluorite as fluorinating agent", APPLIED CHEMICAL INDUSTRY, vol. 50, no. 6, 26 March 2021 (2021-03-26), pages 1526 - 1528, 1537, XP093098161, DOI: 10.16581/j.cnki.issn1671-3206.20210325.016
Attorney, Agent or Firm:
CHOFN INTELLECTUAL PROPERTY (CN)
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