▎ 摘　　要

NOVELTY - Zinc ion battery comprises an anode, a diaphragm, a cathode and an aqueous electrolyte. The anode comprises a zinc foil and a positive active material. The positive active material comprises a graphene layer or poly (3,4-ethylenedioxythiophene)-polystyrene sulfonate/graphene layer. The thickness of the positive active material is 1-50 mu m. The graphene layer comprises graphene and polyvinylidene fluoride. The weight ratio of the graphene and polyvinylidene fluoride is 8:1-2:1. USE - Used as zinc ion battery. ADVANTAGE - The battery can effectively adjust the distribution density of the zinc ion and inhibit the growth of the dendritic crystal. The battery has better cycle performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a preparation method of zinc ion battery.