PROCESS FOR PRODUCING GRAPHENE-PROTECTED METAL FOIL CURRENT COLLECTOR FOR A BATTERY OR SUPERCAPACITOR

Provided is a process for producing a thin film graphene-bonded metal foil current collector for a battery or supercapacitor, said process comprising: (a) providing a graphene suspension comprising graphene sheets dispersed in a liquid medium; (b) operating a micro-gravure coater to deposit a layer of the graphene suspension onto at least one of the two primary surfaces of a metal foil to form a wet layer of graphene deposited thereon; and (c) removing said fluid medium from the deposited wet layer to form a dry layer of graphene, having a layer thickness from 1 nm to 100 nm. Optionally, the process may include heat treating the dry layer of graphene at a temperature from 35° C. to 3,000° C.