▎ 摘　　要

NOVELTY - High first-efficiency graphene composite silicon-carbon cathode material comprises silicon-carbon particles with a core-shell structure and graphene micro-sheet composite. The outer layer of the silicon-carbon particles with core-shell structure is an inorganic carbon layer and the inner layer is a silicate-coated nano-silicon particles. The silicon carbon particles with core-shell structure and the graphene microplates are compounded by the cross-connection effect of silicate. USE - Used as high first-efficiency graphene composite silicon-carbon cathode material. ADVANTAGE - The material: has excellent lithium-ion conductivity and structural stability; synergistically reduces the expansion of the material; improves the conductivity of the material; inhibits volume expansion of the nano-silicon in the primary particles during the cycle through the multi-level coating structure of the silicate layer and the inorganic carbon layer, and cross-connection effect of the silicate components; reduces damage to secondary particles caused by volume expansion during charging and discharging; and ensures that the cathode material has high gram capacity and excellent cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for battery.