▎ 摘　　要

NOVELTY - The preparation method comprises (i) adding sodium molybdate and thiourea into solvent, uniformly stirring to form mixed solution, in the mixed solution, adding graphene oxide solution, performing ultrasonic dispersion to form solution A, (ii) dispersing selenium powder in hydrazine hydrate solution to form solution B, (iii) mixing the solution A and solution B, performing hydrothermal reaction, centrifuging after reaction, washing, drying, and obtaining composite electrode material containing anion defect after heat treatment, (iv) mixing the composite electrode material, conductive carbon black and polyvinylidene fluoride, adding N-methyl pyrrolidone, preparing into paste, coating to the carbon cloth, drying and slicing the carbon cloth to obtain the composite electrode. USE - Preparation method of composite electrode for aqueous zinc ion battery (claimed). ADVANTAGE - The composite electrode material has high specific surface area, good crystallinity, high stability, and large amount of anion cavity, thus improving the capacity of the battery, multiplying power performance and cycle stability and providing excellent aqueous zinc ion battery electrode material.