▎ 摘　　要

NOVELTY - An organic-inorganic composite electrode material comprises organic electrode material and inorganic electrode material. The organic electrode material is organic substance with redox active group comprising carbonyl compound, nitrile compound, organic free radical compound, imino compound, azo compound and/or organic sulfide. The inorganic electrode material includes transition metal oxide, transition metal sulfide and/or transition metal selenide. The inorganic electrode material has specific capacity of greater than 100 mAh/g and forbidden band width of 0. The inorganic electrode material is used as active material for storing embedded ions and transmitting electrons to organic electrode material for improving proportion of active material in electrode, reducing whole porosity of electrode and liquid absorption amount and improving capacity and energy density of electrode. USE - The organic-inorganic composite electrode material is used in battery electrode and secondary battery (all claimed). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) a method for preparing organic-inorganic composite electrode material comprising putting organic electrode material and inorganic electrode material in ball milling tank and sealing and ball milling for 0.1-72 hours, or adding organic electrode material and inorganic electrode material with solvent, stirring under inert gas atmosphere for 1-48 hours and volatilizing solvent; (2) a battery electrode comprising organic-inorganic composite electrode material; and (3) a secondary battery comprising battery electrode.