▎ 摘　　要

NOVELTY - The multivalent metal-ion battery comprises an anode, a cathode, and an electrolyte in ionic contact with the anode and the cathode to support reversible deposition and dissolution of a multivalent metal at the anode. The multivalent metal is selected from nickel, zinc, beryllium, magnesium, calcium, barium, lanthanum, titanium, tantalum, zirconium, niobium, manganese, vanadium, cobalt, iron, cadium, chromium, gallium, indium, or their combination. The anode contains the multivalent metal or its alloy as an anode active material. The cathode comprises a cathode active layer of a graphite or carbon material having expanded inter-graphene planar spaces with an inter-planar spacing from 0.43 nm to 2.0 nm as measured by X-ray diffraction. USE - Rechargeable multivalent metal-ion battery, e.g. zinc-, nickel-, or magnesium-ion battery. ADVANTAGE - The high surface areas of the anode current collector not only facilitate fast and uniform dissolution and deposition of metal ions, but also act to reduce the exchange current density and, thus, the tendency to form metal dendrites that otherwise could cause internal shorting. The nano-structured, porous supporting material for the multivalent metal can significantly improve the metal deposition-dissolution kinetics at the anode, enabling high-rate capability of the resulting multivalent metal secondary cell. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method of manufacturing a multivalent metal-ion battery. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic of a multivalent metal-ion battery.