▎ 摘　　要

NOVELTY - The graphene-based storage material (100) comprises graphene sheets (102) disposed in a vertical stack (104), where the graphene sheets, within the vertical stack, comprise randomly-distributed defect pores (106) formed by in-plane carbon vacancies. An average diameter of the defect pores is less than 30 nm. An average density of the defect pores in the graphene sheets, as measured by the ratio of the average separation distance between adjacent pores to the average pore diameter, is 100. The graphene sheets are part of a structure comprising a continuous network of graphitic regions. USE - The graphene-based storage material is useful in a lithium ion battery (claimed). ADVANTAGE - The graphene-based storage material can be economically prepared with excellent tensile modulus and mechanical durability, improved cycling stability and high electrical conductivity thus increasing power capabilities and storage capacities of the lithium ion battery. DETAILED DESCRIPTION - The graphene-based storage material (100) comprises graphene sheets (102) disposed in a vertical stack (104), where the graphene sheets, within the vertical stack, comprise randomly-distributed defect pores (106) formed by in-plane carbon vacancies. An average diameter of the defect pores is less than 30 nm. An average density of the defect pores in the graphene sheets, as measured by the ratio of the average separation distance between adjacent pores to the average pore diameter, is 100. The graphene sheets are part of a structure comprising a continuous network of graphitic regions that comprise crystalline portions of the vertical stack of graphene sheets. The continuous network of graphitic regions is integrated with a composite that comprises disordered portions of the vertical stack of graphene sheets and an electrochemically active silicon material in contact with the graphene sheets in the disordered portions of the vertical stack. The silicon material is present in the form of silicon nanoparticles dispersed between the graphene sheets in the disordered portions of the vertical stack. INDEPENDENT CLAIMS are included for: (1) a lithium ion battery; and (2) a method of making an electrode material. DESCRIPTION OF DRAWING(S) - The figure shows a schematic cross-sectional view of a graphene-based material. Graphene-based storage material (100) Graphene sheets (102) Vertical stack (104) Randomly-distributed defect pores. (106)