▎ 摘　　要

NOVELTY - Natural crystalline graphite flakes are added to concentrated sulfuric acid solution, oxidizing agent is added, stirred, and heated, to obtain oxidized graphite solution. The resultant solution is ultrasonically dispersed, phosphomolybdic acid is added, mixed, reducing agent is added, stirred, washed with deionized water and ethanol, and dried in vacuum, to obtain graphene-molybdenum oxide composite material precursor. The resultant product is sintered in a high-temperature tube furnace, heated, heat-preserved, and cooled, to obtain nano graphene-based composite material. USE - Preparation of nano graphene-based composite material used as electrode material. ADVANTAGE - The method enables simple, reliable and economical preparation of nano graphene-based composite material having excellent electroconductivity, with reduced generation of large particles. DETAILED DESCRIPTION - Natural crystalline graphite flakes are added to concentrated sulfuric acid solution, oxidizing agent is added, stirred, and heated, to obtain oxidized graphite solution. The resultant solution is ultrasonically dispersed, oxidized graphite suspension is obtained, phosphomolybdic acid is added, mixed, reducing agent is added, stirred, maintained at room temperature, washed with deionized water and ethanol, and dried in vacuum, to obtain graphene-molybdenum oxide composite material precursor. The resultant product is sintered in a high-temperature tube furnace, heated, heat-preserved, and cooled to room temperature, to obtain nano graphene-based composite material. An INDEPENDENT CLAIM is included for nano graphene-based composite material.