The invention discloses a method for preparing a
graphene /
sodium manganate flexible thin film and a method using the
graphene /
sodium manganate flexible thin film to prepare an aqueous
sodium-
zinc compound battery, relates to methods for preparing
graphene thin films and methods using the graphene thin films to prepare compound batteries, and aims to solve the problem that an existing battery
anode material is complex in preparation process, low in
conductivity and unstable in electrochemical performance. The method for preparing the graphene /
sodium manganate flexible thin film includes the steps of firstly, preparing Na4Mn9O18
powder; secondly, adding graphene
oxide into deionized water, and performing ultrasonic treatment to obtain a solution A; thirdly, preparing a graphene
oxide /
sodium manganate flexible thin film; fourthly,
drying the graphene
oxide /
sodium manganate flexible thin film to obtain the graphene / sodium
manganate flexible thin film. The prepared graphene / sodium manganate flexible thin film is simple in process, has sufficient
toughness, can be curled at will and can be directly
cut to serve as a flexible
electrode. By the methods, the graphene / sodium manganate flexible thin film and the aqueous sodium-
zinc compound battery can be prepared.