▎ 摘　　要

NOVELTY - The method involves performing (S1) lithium-philic modification on the three-dimensional host to obtain a lithium-philic three-dimensional host. A buffer interface of a graphene-based material is loaded (S2) on the surface of the lithium-philic three-dimensional host to obtain a lithium-philic three-dimensional host containing the buffer interface. The solid lithium metal is heated and melted (S3) under an inert atmosphere, and the lithium-philic three-dimensional host containing the buffer interface is contacted with the molten lithium and then cooled and solidified. The composite lithium metal negative electrode containing the buffer interface is prepared. The carbon material is prepared from one of carbon cloth, carbon fiber, carbon felt, graphene, and carbon nanotube. USE - Method used for preparing composite lithium metal negative electrode of lithium ion battery (all claimed) containing buffer interface. ADVANTAGE - The method effectively combines the suppression of the side reaction of the lithium metal interface and the stabilization of the lithium metal negative electrode structure, and can also solve the problem of poor contact between the solid electrolyte and the lithium metal and improve the cycle performance of the battery. DESCRIPTION OF DRAWING(S) - The drawing shows a flowchart illustrating the method used for preparing composite lithium metal negative electrode of battery. (Drawing includes non-English language text) Step for performing lithium-philic modification on three-dimensional host (S1) Step for loading buffer interface of a graphene-based material (S2) Step for heating solid lithium metal (S3)