Patent ID: 11923526
Assignee: GLOBAL GRAPHENE GROUP, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. 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, wherein said graphene sheets comprise sheets of a graphene material selected from pristine graphene, graphene fluoride, graphene chloride, graphene bromide, graphene iodide, hydrogenated graphene, nitrogenated graphene, doped graphene, chemically functionalized graphene, or a combination thereof; (b) operating a gravure or micro-gravure coater to deposit a layer of said graphene suspension onto at least one of two primary surfaces of a metal foil to form a wet layer of graphene deposited thereon; and (c) removing said liquid medium from the deposited wet layer to form a dry layer of graphene, having a layer thickness from 1 nm to 1000 nm, wherein the metal foil is Cu, Ni, stainless steel, Ti, or Al foil; further including a procedure of chemically etching said at least one of two primary surfaces of the metal foil to remove a surface-borne passivating layer prior to (a).