▎ 摘　　要

NOVELTY - A graphene-cobalt hydroxide nanofilm preparation method involves taking 50-200 g/l hydrated cobalt salt and 10-80 g/l sodium salt, dissolving in the deionized water, adding 28% ammonia water to product, and reacting the product for 10-15 minutes under high pressure. The product is subjected to hydro-thermal treatment followed by precipitating the product, washing product with deionized water and anhydrous ethanol and drying the product under lower atmosphere. USE - Method for preparing graphene-cobalt hydroxide nanofilm. ADVANTAGE - The method enables preparing the graphene-cobalt hydroxide nanofilm in a simple, convenient and cost-effective manner.