▎ 摘　　要

NOVELTY - Preparing graphene lithium salt (I), comprises e.g. (i) reacting graphite oxide with lithium methoxide and methanol by stirring ultrasonically at room temperature for 1-12 hours, filtering out excess methanol and lithium methoxide, and drying to obtain graphene oxide derivative lithium salt (II), (ii) reacting (II) with ethylene oxide for 1-10 hours at 80-150 degrees C, and evaporating excess ethylene oxide to obtain graphene oxide-ethylene oxide derivative lithium salt (III), and (iii) reacting (III) with metal lithium and liquid ammonia for 12 hours at -33 degrees C, and evaporating excess liquid ammonia. USE - (I) is useful as supercapacitor anode material in lithium ion battery. ADVANTAGE - (I) produced by the above method: has good conductivity and mechanical properties; has good power density, long life cycle and good interface compatibility; and has high capacity. DETAILED DESCRIPTION - Preparing graphene lithium salt of formula (I), comprises (i) adding graphite oxide into a reactor containing lithium methoxide and methanol, stirring at room temperature ultrasonically and reacting for 1-12 hours, then filtering out excess of methanol and lithium methoxide, and drying to obtain graphene oxide derivative lithium salt (II), where mass ratio between the graphite oxide and lithium methoxide is 15:7, and adding amount of graphite oxide is 30 mg/10 ml methanol, (ii) reacting (II) with ethylene oxide for 1-10 hours at 80-150 degrees C and 0.2-0.5 MPa, and evaporating excess ethylene oxide to obtain graphene oxide-ethylene oxide derivative lithium salt (III), where adding amount of ethylene oxide is 5-30 mg, and adding amount of (II) is 1-5 mg, and (iii) adding (III) into a container containing metal lithium and liquid ammonia, stewing for 12 hours at -33 degrees C, evaporating excess liquid ammonia, then adding 100 ml methanol, and removing excess metal lithium to obtain final product, where mass ratio between metal lithium and graphene derivative lithium salt is 1:0.03. n = not defined. INDEPENDENT CLAIMS are also included for: (1) graphene lithium salt prepared by the above method; (2) anode comprising a current collector and anode material coated on the current collector, where the anode material is composed of anode active material, a conductive agent and a bonding agent in a mass ratio of 85:10:5, and the anode active material is graphene lithium salt; and (3) supercapacitor comprising the anode.