▎ 摘　　要

NOVELTY - Production of bi-polar electrode involves (i) providing a conductive material foil having thickness of 10 nm-100 microm and two opposing parallel primary surfaces and coating one or both of the primary surfaces with a layer of graphene material having thickness of 5 nm to 50 microm to form a graphene-coated current collector, and (ii) depositing a negative electrode layer and a positive electrode layer onto two opposing primary surfaces of the graphene-coated current collector. The negative electrode layer is in physical contact with the layer of graphene material or directly with a primary surface of the conductive material foil and positive electrode layer is in physical contact with the layer of graphene material or directly with the opposing primary surface of the conductive material foil. The negative electrode and the positive electrode deposited on the two opposing primary surfaces have different compositions or structures. USE - Production of bi-polar electrode used for battery and capacitor. Uses include but are not limited to lithium battery, supercapacitor, zinc-air battery, nickel metal hydride battery, sodium-ion battery, and magnesium-ion battery. ADVANTAGE - The method produces non-reactive, corrosion-resistant, thermally and electrically conductive, ultra-thin, and lightweight bi-polar electrode having low contact resistance, and enables higher output voltage, higher energy density, high rate-capability, and much longer cycle life of the battery.