Title:
METHOD FOR CONTROLLING INTERFACE BETWEEN SOLID-STATE ELECTROLYTE AND METALLIC LITHIUM NEGATIVE ELECTRODE
Document Type and Number:
WIPO Patent Application WO/2021/159595
Kind Code:
A1
Abstract:
The present invention provides a method for controlling an interface between a solid-state electrolyte and a metallic lithium negative electrode, comprising the following steps of: S1) melting metallic lithium in an inert gas atmosphere; S2) adding an appropriate amount of a flux to the molten metallic lithium; S3) subjecting a solid-state electrolyte substrate to a polishing treatment; S4) placing the solid-state electrolyte onto a heating plate and heating; S5) coating the mixed melt evenly onto the solid-state electrolyte; S6) melting an aluminum foil into the mixed molten metal in good contact with the solid-state electrolyte; S7) controlling the thickness of metallic lithium, according to the amount of metallic lithium required for a battery cycle; and S8) cooling the product naturally to room temperature. The present invention achieves a cleaner lithium negative electrode and a higher battery efficiency by means of melting a trace amount of the flux and metallic lithium and coating the mixture onto the surface of the solid-state electrolyte, so as to achieve an infiltration effect on the solid-state electrolyte. In-situ SEI control on the surface layer of the solid-state electrolyte is achieved by adding a metallic aluminum foil.
Inventors:
LIU ZHENG (CN)
FU XINGJIE (CN)
JIANG MIAOLI (CN)
SHEN WENZHONG (CN)
CHEN PENGFEI (CN)
PENG ZHANGQUAN (CN)
WANG DA (CN)
QIU ZHENPING (CN)
ZHANG YELONG (CN)
ZENG QINGGUANG (CN)
FU XINGJIE (CN)
JIANG MIAOLI (CN)
SHEN WENZHONG (CN)
CHEN PENGFEI (CN)
PENG ZHANGQUAN (CN)
WANG DA (CN)
QIU ZHENPING (CN)
ZHANG YELONG (CN)
ZENG QINGGUANG (CN)
Application Number:
PCT/CN2020/081909
Publication Date:
August 19, 2021
Filing Date:
March 28, 2020
Export Citation:
Assignee:
UNIV WUYI (CN)
International Classes:
H01M4/134; H01M10/42; H01M4/1395; H01M10/0562
Foreign References:
| CN110767894A | 2020-02-07 | |||
| CN109920980A | 2019-06-21 | |||
| CN108110217A | 2018-06-01 | |||
| DE102016214399A1 | 2018-02-08 | |||
| CN109921106A | 2019-06-21 |
Attorney, Agent or Firm:
BEIJING SHENGFANZHIRONG INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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