▎ 摘　　要

NOVELTY - Constructing ionic supercapacitor based on electroactive ionic liquids comprises (a) dissolving the alkylimidazolium bromide or alkylimidazolium chloride ionic liquid monomer and initiator in chloroform, heating and refluxing at 70°C for 5-7 hours, cooling, washing, and vacuum-drying to obtain polymerized ionic liquid PILs, (b) dispersing two-dimensional graphene oxide GO nanosheets in deionized water, adding the PILs and hydrazine hydrate and reacting at 90-100°C, filtering the resulting product, centrifuging to obtain polymerized ionic liquid-reduced graphene oxide composite PILs-rGO, (c) mixing the PILs-rGO with an aqueous solution of inorganic salt or organic salt, stirring, dispersing the EAI-PILs-rGO with different redox properties in deionized water, drip-coating the obtained EAIPILs-rGO dispersion on the current collector, drying, assembling active electrode materials on asymmetric ionic supercapacitor. USE - Method for constructing new ionic super capacitor based on electroactive ionic liquid. ADVANTAGE - The method is simple, easy to operate, has universality, and has excellent application prospect. The method uses ion exchange property of ion liquid and high conductivity and high specific surface area of graphene material, preparing a series of electroactive graphene-based composite electrode material, the material has excellent electrochemical redox reaction reversibility, large specific surface areas and adjustable potentials. In the charging and discharging process, only the change of ion valence state occurs in the electrode, does not relate to active component phase change or dissolution deposition process, so that it has excellent structure stability, and it has high power density of the traditional capacitor and high energy density of secondary battery.