Method for improving surface stability of lithium metal

• Main Authors: XIA YANG, GAN YONGPING, HUANG HUI, LIANG CHU, ZHANG JUN, HAN YIYAO, ZHANG WENKUI, LU CHENGWEI
• Format: Patent
• Language: Chinese; English
• Published: 28.02.2020
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

The invention belongs to the technical field of material processing, and relates to a method for improving the surface stability of lithium metal. The invention aims to solve the problems of high storage requirements of existing lithium metal, poor processability and the like, and provides a lithium metal surface modification method which is simple and convenient to operate and rapid and efficient. Freon is utilized to react with the lithium metal surface, so that a uniform and compact lithium fluoride coating layer is built in situ on the surface of the lithium metal. The coating layer builtthrough the method is tightly combined with the lithium metal base body, so that the lithium metal is inhibited from reacting with water and oxygen in air, the requirements for storage and use environment of the lithium metal is reduced, and stability of the lithium metal in the air is improved. In addition, the surface modification method has the advantages of simple operation, low cost, no "three wastes" and the like, a