Preparation method of graphene film anode material and application in aluminum ion battery

摘要

The present invention discloses a method for preparing a graphene film anode material, which includes coating a graphene oxide solution on a substrate, drying, removing the substrate, performing reduction and obtaining a graphene film with ultra-high conductivity. The present invention also provides an application of the graphene film in an aluminum ion battery, which has relatively stable battery performance in a very wide temperature range of −40° C. to 120° C., maintains complete electrochemical performance after being bent for 10,000 times, and maintains 91% performance after 250,000 cycles. The present invention has advantages of simple operation and continuous controllable production method, is suitable for large-scale production, is low in cost, improves the energy density of the aluminum ion battery while ensuring high power density, and can be used for energy storage materials and device fields which need high safety, high power density, long life and wide temperature range and flexibility.