▎ 摘　　要

NOVELTY - Preparing heteropoly blue lithium salt graphene cathode material comprises (i) adding graphene oxide into isopropanol using isopropanol as solvent, (ii) adding lithium polyoxometalate into isopropanol containing graphene oxide under ultraviolet light irradiation, performing redox reaction with graphene oxide to form heteropoly blue lithium salt graphene composite material, and (iii) washing and drying heteropoly blue lithium salt graphene composite material to obtain heteropoly blue lithium salt graphene cathode material. USE - The method is useful for preparing heteropoly blue lithium salt graphene cathode material. ADVANTAGE - The cathode material reduces internal resistance and polarization of the battery, and improve battery performance.