Patent ID: 11881564
Assignee: GLOBAL GRAPHENE GROUP, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A method of improving a cycle-life of a lithium metal secondary battery comprising a cathode having a cathode active material layer, an anode, and an electrolyte-separator assembly disposed between said cathode and said anode, said method comprising a procedure of implementing an anode-protecting layer between an anode active material layer or an anode current collector of said anode and the electrolyte-separator assembly, wherein said anode-protecting layer is in a physical contact with said anode active material layer or said anode current collector, has a thickness from 10 nm to 500 μm, and comprises an electrically and ionically conducting network of cross-linked polymer chains having a lithium ion conductivity from 10−8 to 5×10−2 S/cm and an electron conductivity from 10−8 to 103 S/cm and wherein said anode active material layer contains a layer of lithium or lithium alloy having greater than 70% by weight of lithium metal in said lithium alloy, in a form of a foil, coating, or aggregate of multiple particles, as an anode active material, wherein said electrically and ionically conducting network of cross-linked polymer chains comprises a conjugated polymer selected from poly(3-alkylthiophenes), poly(isothianaphthene), alkoxy-substituted poly(p-phenylene vinylene), poly(2,5-bis(cholestanoxy) phenylene vinylene), poly(2,5-dialkoxy) paraphenylene vinylene, poly [(1,4-phenylene-1,2-diphenylvinylene)], poly(3′,7′-dimethyloctyloxy phenylene vinylene), polyparaphenylene, polyparaphenylene sulphide, polyheptadiyne, poly(3-hexylthiophene), poly(3-octylthiophene), poly(3-cyclohexylthiophene), poly(3-methyl-4-cyclohexylthiophene), poly(2,5-dialkoxy-1,4-phenyleneethynylene), poly(2-decyloxy-1,4-phenylene), poly(9,9-dioctylfluorene), polyquinoline, a derivative thereof, a copolymer thereof, a sulfonated version thereof, or a combination thereof.