▎ 摘　　要

NOVELTY - The preparation method of polypyrrole nanowire array/graphene sheet/stannic oxide composite material involves: (1) dissolving three-dimensional graphene oxide in deionized water, and carrying out ultrasonic treatment to obtain a three-dimensional graphene oxide solution as aqueous phase; (2) dissolving purified pyrrole in chloroform to prepare an oil phase, then mixing with the aqueous phase, using an interface polymerization method to carry out reaction to generate a dark green product, filtering and washing, and drying to obtain polypyrrole nanowire/graphene oxide composite material; (3) dissolving the composite material in deionized water, adding stannous chloride solution and hydrogen iodide solution, carrying out ultrasonic treatment and then transferring the mixture to a reaction kettle, and then cooling to prepare a mixed solution; and (4) adding sodium hydroxide solution to the mixed solution, carrying out ultrasonic treatment, naturally cooling, washing, and then drying. USE - The method is useful for preparing polypyrrole nanowire array/graphene sheet/stannic oxide composite material. ADVANTAGE - The method enables simple and reliable preparation of polypyrrole nanowire array/graphene sheet/stannic oxide composite material with regular space structure, high energy density and power density, and excellent cycle performance in an environmentally-friendly manner. DETAILED DESCRIPTION - The preparation method of polypyrrole nanowire array/graphene sheet/stannic oxide composite material involves: (1) dissolving three-dimensional graphene oxide in deionized water, and carrying out ultrasonic treatment for 10 minutes to obtain a three-dimensional graphene oxide solution as aqueous phase; (2) dissolving purified pyrrole in chloroform to prepare an oil phase, then mixing with the aqueous phase, using an interface polymerization method to carry out reaction at 0-5 degrees C for 24 hours to generate a dark green product at an oil-water interface, filtering and washing, and drying at 60 degrees C for 12 hours to obtain polypyrrole nanowire/graphene oxide composite material; (3) dissolving the polypyrrole nanowire/graphene oxide composite material in deionized water, adding stannous chloride solution and hydrogen iodide solution under completely stirring, carrying out ultrasonic treatment for 5 minutes and then transferring the mixture to a high-pressure reaction kettle, reacting at 180 degrees C for 4 hours, and then cooling to room temperature to prepare a mixed solution; and (4) adding sodium hydroxide solution to the mixed solution, carrying out ultrasonic treatment for 5 minutes, reacting at 180 degrees C for 2 hours, naturally cooling to room temperature, washing the obtained product with deionized water, and then drying to obtain the product. The mass ratio of purified pyrrole and three-dimensional graphene oxide is (0.1-4):1. The mass ratio of stannous chloride and sodium hydroxide is 1:4. The mass ratio of three-dimensional graphene oxide and hydrogen iodide is 1:2.56. The mass ratio of the stannic oxide and three-dimensional graphene oxide is (0.1-2):1.