▎ 摘　　要

NOVELTY - Composite particle comprises a lithium-permeable graphene-based external layer defining an inner volume, where the inner volume contains many electrochemically active particles and electro chemically inactive particles, and the electro chemically inactive particles are capable of volume reduction to form void space within the inner vol.. The battery electrode is a silicon anode. The void space allows the silicon nanoparticles to expand into the void space to reduce stress on the graphene based external layer. The electro chemises active particles comprise silicon nanoparticle which expand contract during charge and discharge. The graphene based outer layer comprises graphene oxide nanoparticles. USE - Composite electrode structure for use in electric vehicles. ADVANTAGE - The method allows the active material to expand/contract during charge and discharge without causing a significant strain on the graphene shell. This significantly improves the cycle-life of thick electrodes such as silicon anodes. The resulting composite displays desirable cyclic stability, retaining specific percentage of its initial capacity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for manufacturing a battery electrode precursor material. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic representation of a composite electrode structure for use in electric vehicles.