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1. (WO2018103563) LITHIUM METAL NEGATIVE ELECTRODE UTILIZED IN LITHIUM BATTERY

Pub. No.:    WO/2018/103563    International Application No.:    PCT/CN2017/113586
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Thu Nov 30 00:59:59 CET 2017
IPC: H01M 4/134
H01M 4/1395
Applicants: TSINGHUA UNIVERSITY
清华大学
Inventors: ZHANG, Qiang
张强
CHENG, Xinbing
程新兵
YAN, Chong
闫崇
Title: LITHIUM METAL NEGATIVE ELECTRODE UTILIZED IN LITHIUM BATTERY
Abstract:
The invention discloses a lithium metal negative electrode utilized in a lithium battery. A solid electrolyte protective layer is disposed at a surface of the lithium metal negative electrode. The invention provides, by performing an electrochemical process on a lithium negative electrode, an efficient and stable solid electrolyte interface at a surface of a lithium plate. In a process of repeated deposition and deintercalation of lithium ions, the solid electrolyte protective layer can inhibit formation of a crystal dendrite to enhance safety performance of the battery, and isolate an electrolyte solution from metal lithium to protect the metal lithium from being corroded by the electrolyte solution. By selecting an electroplating method and a type of an electrolyte solution, the embodiment can be employed to implement effective protection of the lithium metal negative electrode, increasing a cycle life of the lithium battery. In comparison to an unprocessed lithium negative electrode, the lithium metal negative electrode protected by the solid electrolyte layer can effectively inhibit formation of crystal dendrite-like lithium deposition, reducing side effects of the electrolyte solution and the metal lithium, and increasing cycle efficiency and cycle stability of the battery, thereby extending the cycle life of the lithium battery employing metal lithium as the negative electrode.