▎ 摘　　要

NOVELTY - A solid state lithium battery preparing method involves using liquid metal composite made of liquid metal nanoparticles, carbon nanotubes and graphene as a negative electrode active material and a solid electrolyte as an electrolyte. USE - Method for preparing solid state lithium battery. ADVANTAGE - The method enables preparing solid state lithium battery with high capacity and security, better mechanical properties, improved safety performance, increased cycle life and stability.