▎ 摘　　要

NOVELTY - A laser preparation method of graphene/cobalt-cobalt(II) oxide composite electrode material, involves (a) ultrasonically mixing graphene oxide and cobalt acetate tetrahydrate to obtain graphene oxide/cobalt acetate dispersion liquid, (b) coating the graphene oxide/cobalt acetate dispersion liquid on a polyethylene terephthalate or polyimide substrate, and drying at room temperature to obtain a graphene oxide/cobalt acetate film, (c) setting a pattern to be processed and the corresponding scanning speed and scanning distance in the control software with a scanning vibration mirror, and setting laser parameters through a computer connected with the laser, and (d) using a laser and the scanning vibration mirror to perform laser direct writing on the graphene oxide/cobalt acetate film in air to obtain a patterned graphene/cobalt-cobalt(II) oxide composite electrode material film, where the direct writing patterns comprise rectangular and interdigitated shapes. USE - Laser preparation method of graphene/cobalt-cobalt(II) oxide composite electrode material for preparing micro-supercapacitor (claimed) used as energy storage device of wearable and portable electronic product. ADVANTAGE - The laser preparation method is simple, efficient, economical, and environmentally-friendly. The prepared micro-supercapacitor has excellent electrochemical performance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the application of graphene/cobalt-cobalt(II) oxide composite electrode material, which involves using interdigitated graphene/cobalt-cobalt(II) oxide composite electrode material film, conductive silver paste, copper foil, room-temperature-vulcanizing silicone rubber and polyvinyl alcohol/phosphoric acid gel electrolyte to prepare micro-supercapacitor. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the laser preparation method of graphene/cobalt-cobalt(II) oxide composite electrode material. (Drawing includes non-English language text)