▎ 摘　　要

NOVELTY - Preparation of graphene self-supporting material involves mixing graphene oxide solution, carbon nanotube solution, metal crosslinking agent, reducing agent and ethanol, hydrothermally reacting, drying and molding. USE - Preparation of graphene self-supporting material used in alkali metal ion battery negative electrode material (all claimed) e.g. sodium ion battery and potassium ion battery material for portable electronic product and power battery application. ADVANTAGE - The method is simple, economical, and dry pressing without wet slurry coating, and does not need to use metal current collector. The graphene self-supporting material has excellent electrochemical properties, and reversible area capacity of 9.2 mAh.cm-2, and is much more than the electrode sheet obtained by wet slurry coating.