▎ 摘　　要

NOVELTY - Preparing silicon/graphene composite flexible electrode involves dispersing lignocellulose in an alkaline aqueous solution and dispersing by ball milling to obtain a lignocellulose dispersion, adjusting the pH of the lignocellulose dispersion to 5-7, and mixing silicon powder with the water-soluble polymer, and then mixing with the lignocellulose dispersion and graphene after pH adjustment, ball milling and mixing. The resulting dispersion is filtered under negative pressure to obtain a flexible film. The flexible film is heat-treated cand cooled to room temperature to obtain a silicon/graphene flexible electrode under an inert atmosphere. USE - Method for preparing silicon/graphene composite flexible electrode for lithium ion battery. ADVANTAGE - The method enables to prepare silicon/graphene composite flexible electrode that stabilizes the structure of materials and electrodes, and solves the problem of poor charge-discharge cycle stability of silicon.