ELECTROLYTIC SOLUTION, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

Title:

ELECTROLYTIC SOLUTION, AND PREPARATION METHOD THEREFOR AND APPLICATION THEREOF

Document Type and Number:

WIPO Patent Application WO/2021/180021

Kind Code:

A1

Abstract:

The present invention provides an electrolytic solution, comprising an organic solvent, an electrolyte, and an additive. The additive comprises a first compound represented by formula 1, wherein R1 is one selected from a single bond, substituted or unsubstituted alkoxy, C1-C6 alkylene, and C2-C6 alkenyl; R2 and R3 each are one independently selected from substituted or unsubstituted alkoxy, C1-C6 alkylene, and C2-C6 alkenyl; and R4 is B or P. The electrolytic solution provided by the present invention contains the first compound, and an N-containing group in the first compound may be combined with a protonic acid in the electrolytic solution. Therefore, the influence of the protonic acid on the electrolytic solution is avoided, and the electrolytic solution has good stability; moreover, the influence of the protonic acid on an electrode material can be avoided, excellent electrodes/electrolytic solution interface films are formed on a positive electrode and a negative electrode, the intercalation/deintercalation of lithium ions on the surfaces of the electrodes is optimized, and the cycle performance of a lithium secondary battery is improved.

Inventors:

LIAO BO (CN)
LI SULI (CN)
WANG HAI (CN)
XU YANMING (CN)
LI JUNYI (CN)

Application Number:

PCT/CN2021/079496

Publication Date:

September 16, 2021

Filing Date:

March 08, 2021

Export Citation:

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Assignee:

ZHUHAI COSMX BATTERY CO LTD (CN)

International Classes:

H01M10/0567

Foreign References:

CN111244549A	2020-06-05
CN105074995A	2015-11-18
CN107851846A	2018-03-27
CN102629696A	2012-08-08
CN110828893A	2020-02-21
CN106785034A	2017-05-31
US20140065476A1	2014-03-06
CN105359324A	2016-02-24

Other References: