▎ 摘　　要

NOVELTY - Preparing graphene oxide loaded dopamine-coated manganese dioxide nanocomposite structure electrode material comprises (i) adding manganese sulfate solution to dilute sulfuric acid solution, and stirring, (ii) adding potassium permanganate solution and graphene oxide dispersion to solution, stirring, and transferring mixed solution to polytetrafluoroethylene reaction kettle for one-step solvothermal reaction, (iii) centrifuging primary product under a high-speed centrifuge, washing with deionized water for multiple times, and placing product in a freeze dryer to dry completely, and (iv) dissolving dopamine in different ratio in deionized water respectively, continuously adding polyethylene oxide-polypropylene oxide-polyethylene oxide, adding primary product obtained in the step (iii) into the solution, stirring, filtering, self-polymerizing in specific mass fraction of aqueous ammonia volatilization atmosphere, and drying to obtain finished product. USE - The material is useful in an aqueous zinc-ion battery (claimed). ADVANTAGE - The method: has simple synthesis method, low price of raw materials, easy mass production and easy recycling; and is environmentally-friendly. DETAILED DESCRIPTION - Preparing graphene oxide loaded dopamine-coated manganese dioxide nanocomposite structure electrode material comprises (i) adding specific concentration of manganese sulfate solution to dilute sulfuric acid solution, and stirring uniformly, (ii) adding specific concentration potassium permanganate solution and graphene oxide dispersion to above-mentioned solution of the step (i), continuously stirring, and transferring mixed solution to a polytetrafluoroethylene reaction kettle for one-step solvothermal reaction, (iii) centrifuging the primary product for multiple times under a high-speed centrifuge, washing with deionized water for multiple times, and placing product in a freeze dryer to dry completely, and (iv) dissolving dopamine in different ratio in deionized water respectively, continuously adding polyethylene oxide-polypropylene oxide-polyethylene oxide, adding primary product obtained in the step (iii) into the solution, stirring, filtering, self-polymerizing in specific mass fraction of aqueous ammonia volatilization atmosphere, and drying to obtain finished product.