▎ 摘　　要

NOVELTY - Iron-based metal organic framework compound/graphene composite material comprises graphene sheet, organic carboxylic acid compound (I), and trivalent iron ions. USE - Iron-based metal organic framework compound/graphene composite material used for preparing lithium-ion battery negative electrode active material (claimed). ADVANTAGE - The batter has high capacity and improved circulation stability. DETAILED DESCRIPTION - Iron-based metal organic framework compound/graphene composite material comprises graphene sheet, organic carboxylic acid compound of formula R(COOH)n (I), and trivalent iron ions. n=greater than 2; and R=aliphatic hydrocarbon and/or amino-substituted aliphatic hydrocarbon. INDEPENDENT CLAIMS are included for: (1) preparation of iron-based metal organic framework compound/graphene composite material comprising dispersing graphene in solvent, adding compound (I) and trivalent iron salt, controlling acidity, crystallizing at 120-170 degrees C for 2-24 hours, separating, and drying; and (2) lithium-ion battery negative electrode active material comprising iron-based metal organic framework compound/graphene composite material.