▎ 摘　　要

NOVELTY - Conformal graphene-encapsulated material comprises: a graphene cage defining an enclosed internal volume; and a battery electrode active material disposed within the enclosed internal volume, where the battery electrode active material occupies less than 100% of the enclosed internal volume to define a void, and a wall of the graphene cage has a thickness of 0.5-100 nm. The battery electrode active material includes at least one of silicon, silicon monoxide, silicon dioxide, tin or tin oxide. USE - The material is useful in a battery electrode for a battery (all claimed). ADVANTAGE - The material: utilizes the graphene cage that defects to provide ionic permeability, and serves as a strong and flexible buffer during deep galvanostatic cycling; exhibits excellent battery performance; is sufficient active material while ensuring enough empty space for the material to expand during lithiation; and allows a previously impractical battery material to have excellent cycle life and battery performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a battery (100). DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of a battery. Battery (100) Cathode (102) Anode (104) Separator (106) Electrolyte (108)