Title:
LITHIUM-ALUMINUM HYDROTALCITE-BASED SOLID ELECTROLYTE MEMBRANE USED AT ROOM TEMPERATURE, PREPARATION THEREOF AND LITHIUM BATTERY COMPRISING SAME
Document Type and Number:
WIPO Patent Application WO/2023/082434
Kind Code:
A1
Abstract:
The present invention belongs to the technical field of solid electrolyte membranes, and particularly relates to a lithium-aluminum hydrotalcite-based solid electrolyte membrane, the preparation and use thereof and a lithium battery comprising same. The solid electrolyte membrane comprises: a solid electrolyte membrane substrate formed by an organic polymer, and a lithium salt and a lithium-aluminum hydrotalcite that are uniformly dispersed in the solid electrolyte membrane substrate, wherein the content of the lithium-aluminum hydrotalcite is 50 wt%-80 wt%, based on the total mass of the solid electrolyte membrane; and the lithium-aluminum hydrotalcite contains metaaluminate intercalation anions. According to the present invention, the lithium-aluminum hydrotalcite-based organic-inorganic composite solid electrolyte membrane with the hydrotalcite addition amount greater than 50 wt% is prepared for the first time, and it is found that the membrane shows higher room-temperature ionic conductivity and a wider electrochemical window. Specifically, the membrane shows an ionic conductivity greater than 10-3 S cm-1 level and an electrochemical stability window greater than 5 V at room temperature, and is obviously superior to solid electrolytes reported in current literatures.
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Inventors:
LIU WEN (CN)
XU MINGGUI (CN)
SUN XIAOMING (CN)
YANG JIJIN (CN)
GAO TING (CN)
LU XIWEN (CN)
XU MINGGUI (CN)
SUN XIAOMING (CN)
YANG JIJIN (CN)
GAO TING (CN)
LU XIWEN (CN)
Application Number:
PCT/CN2021/140302
Publication Date:
May 19, 2023
Filing Date:
December 22, 2021
Export Citation:
Assignee:
UNIV BEIJING CHEM TECH (CN)
International Classes:
H01M10/0565
Domestic Patent References:
| WO2021188418A1 | 2021-09-23 |
Foreign References:
| CN108110316A | 2018-06-01 | |||
| CN102035044A | 2011-04-27 | |||
| CN101276658A | 2008-10-01 |
Other References:
SHUIXIN XIA; BINBIN YANG; HEBIN ZHANG; JUNHE YANG; WEI LIU; SHIYOU ZHENG: "Ultrathin Layered Double Hydroxide Nanosheets Enabling Composite Polymer Electrolyte for All‐Solid‐State Lithium Batteries at Room Temperature", ADVANCED FUNCTIONAL MATERIALS, vol. 31, no. 28, 22 April 2021 (2021-04-22), DE , XP072411250, ISSN: 1616-301X, DOI: 10.1002/adfm.202101168
Attorney, Agent or Firm:
BEIJING LINGZHUAN INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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