▎ 摘　　要

NOVELTY - Preparing double oxide/graphene nanocomposite electrode material comprises e.g. dissolving cobalt chloride hexahydrate and aluminum nitrate nonahydrate in a small beaker containing distilled water and continue adding graphene (2.6 mg/ml), adding 2 ml aquoeus ammonia, removing magnet, transferring mixed solution into volume of 50 ml stainless steel autoclave containing polytetrafluoroethylene liner, sealing in high-pressure reactor, placing in oven at 180 degrees C, washing with distilled water and ethanol, placing precipitate in oven at 60 degrees , drying and calcining. USE - The method is useful for preparing double oxide/graphene nanocomposite electrode material (claimed). ADVANTAGE - The method has high yield, simple preparation process and is suitable for industrial production; and product has specific volume of 968 F/g at scanning current density of 1 A/g, and retention rate remains as high as 85% after 1000 cycles. DETAILED DESCRIPTION - Preparing double oxide/graphene nanocomposite electrode material comprises dissolving 1.19 g cobalt chloride hexahydrate and 0.075 g aluminum nitrate nonahydrate in a small beaker containing 30 ml distilled water and continue adding 4 ml graphene (2.6 mg/ml), sonicating for 30 minutes, stirring with magnetic stirrer, adding 2 ml aquoeus ammonia, removing magnet, transferring mixed solution into volume of 50 ml stainless steel autoclave containing polytetrafluoroethylene liner, sealing in high-pressure reactor, placing in oven at 180 degrees C, removing for 12 hours and allowing to cool to room temperature, centrifugating at 8000 revolution per minute for 5 minutes to obtain precipitate, washing three times with distilled water and ethanol, placing precipitate in oven at 60 degrees , drying for 12 hours, calcining for 3 hours to obtain final product.