Method for producing graphene membrane cathode material and its use as aluminum ion battery

摘要

The present invention discloses a method for producing a graphene film cathode material, in which a graphene oxide solution is applied on a base, the base is removed after drying, and a graphene film having ultra-high conductivity is obtained after reduction. The present invention further provides the use of the above graphene membrane as an aluminum ion battery, has relatively stable battery performance in a very wide temperature range of 40 degrees Celsius to 120 degrees Celsius, and has 10,000 bending times. Retains full electrochemical performance after the test and 91% performance after 250,000 cycles. The present invention has the advantages that the operation is simple, the production method can be continuously controlled, the method can be applied to large-scale production, and the cost is low. Ensure the high power density of aluminum ion batteries, increase their energy density, and use them in the field of energy storage materials and devices that require high safety, high power density, long life and wide temperature range and flexibility. Can be.