▎ 摘　　要

NOVELTY - High-specific-property lithium ion capacitor comprises positive electrode inorganic oxide material doped with lithium cobaltate, graphite alkenyl manganese dioxide composite material, nickel cobalt lithium manganate material and active carbon of graphene. USE - High-specific-property lithium ion secondary battery and capacitor. ADVANTAGE - The lithium ion capacitor has high specific property, clean appearance, no liquid leakage, high energy density, and large power discharge capability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing high-rate lithium ion capacitor, which involves: (A) mixing graphene-based ferroferric oxide composite material, activated carbon, lithium titanate, conductive agent, binder, and solvent for 2-3 hours to obtain a uniform viscous negative electrode active slurry; (B) coating with a doctor blade on the current collector to dry in a vacuum drying oven at 80-100 degrees C for 48 hours; (C) cutting to the required size to prepare the negative electrode sheet; (D) mixing composite lithium cobalt oxide and graphene-based manganese dioxide Material, NCM811, graphene, activated carbon, conductive agent, binder, and solvent for 2-3 hours to obtain a uniform viscous positive electrode active slurry; (E) coating on the current collector with a doctor dry in a drying box at 80-100 degrees C for 48 hours; (F) cutting to obtain the positive electrode sheet to required size; (G) preparing the positive electrode sheet, the negative electrode sheet, the separator, and the electrolyte; and (H) packing in a glove box protected by nitrogen capacitor.