▎ 摘　　要

NOVELTY - Preparing graphene cathode comprises (1) taking the graphene, carboxymethyl cellulose and water to prepare into graphene coating liquid, coating the graphene liquid on the copper foil, after drying, forming a graphene layer on the copper foil surface, (2) taking nano silicon and polyacrylonitrile solution for stirring and dispersing, spraying, drying the precursor particles, the precursor particles and water are configured into precursor mixed solution and adding into the ultrasonic oscillator, performing ultrasonic oscillation treatment for 30-90 hours, adding acrylic acid monomer and photoinitiator to prepare precursor coating liquid, coating the precursor coating liquid on the graphene layer, curing under ultraviolet radiation; then drying surface forming a precursor film layer on the graphene, and (3) orderly performing pre-oxidation treatment and low temperature carbonization treatment to the copper foil with precursor film layer to obtain the product. USE - The method is useful for preparing graphene cathode . ADVANTAGE - The graphene cathode improves the conductivity of the cathode and inhibits generation of lithium dendritic crystal and dead lithium. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for lithium battery, comprising container, positive electrode sheet, diaphragm, electrolyte and graphene cathode sheet.