▎ 摘　　要

NOVELTY - Preparing borate ion cross-linked conductive graphene paper comprises taking graphite as carbon source, preparing graphite oxide by Hummers method, and adding into deionized water and ultrasonic peeling to obtain graphene oxide hydrosol; adding boric acid, heating, and dispersing in deionized water, to obtain uniformly dispersed borate ion cross-linked reduced graphene oxide hydrosol; and passing the hydrosol into a self-assembled filter membrane layer to obtain conductive borate ion cross-linked graphene paper, drying naturally and peeling from the microporous membrane. USE - The graphene paper is useful for electric conduction material in photo-electronic device. ADVANTAGE - The method is simple, economical, and easy for mass production, and does not need special device. The graphene paper has good conductivity. DETAILED DESCRIPTION - Preparing borate ion cross-linked conductive graphene paper comprises (i) taking graphite as carbon source, preparing graphite oxide by Hummers method, and adding into deionized water and ultrasonic peeling to obtain graphene oxide hydrosol; (ii) adding sodium hydroxide solution into the obtained graphene oxide hydrosol, adjusting the pH to 10-12, adding boric acid, where the mass ratio of boric acid and graphene oxide is 0.1-2:50, then heating to 80-90 degrees C with stirring, insulating for 3-5 hours, naturally cooling, separating, washing, and ultrasonically dispersing in deionized water, to obtain uniformly dispersed borate ion cross-linked reduced graphene oxide hydrosol; and (iii) passing the borate ion cross-linked reduced graphene oxide hydrosol into a self-assembled filter membrane layer to obtain conductive borate ion cross-linked graphene paper, then drying naturally and peeling from the microporous membrane.