▎ 摘　　要

NOVELTY - A vanadium pentoxide-reduced graphene oxide composite material is prepared by preparing graphite oxide adopting modified hummers method, placing deionized water and absolute alcohol in 250 ml beaker, putting into stirrer, sealing cup mouth, placing on magnetic stirrer heated by oil bath for heating, dissolving vanadium pentoxide and weak acid in mixed solution, keeping temperature of solution at 80 degrees C, heating for 3 hours, draining 40 ml of 1 mg/ml graphite oxide into vanadium pentoxide precursor solution while stirring, adjusting pH of solution to 2 with weak acid, heating and stirring solution and keeping solution temperature at 80 degrees C, continuously processing for 1 hour, placing mixed solution in PTFE reaction kettle, placing in constant temperature furnace for heating, naturally cooling constant temperature furnace to room temperature, taking 5-10 ml solution in small capacity opening glass bottle, and freeze-drying. USE - The method is used for preparing vanadium pentoxide-reduced graphene oxide composite material as anode material in secondary battery. ADVANTAGE - The method has no other auxiliary substance. The material overcomes low conductivity of vanadium pentoxide itself, small specific surface area and poor electrochemical stability, utilizes electrochromic principle, and improves cycle and rate performance of battery and response speed of smart windows and automobile rearview mirrors in energy-saving and emission-reduction fields.