▎ 摘　　要

NOVELTY - Preparation of boron-nitrogen-mixed graphene hydrogel involves mixing graphite oxide solution and ammonium pentaborate, ultrasonically-treating, transferring to a reactor, hydrothermally reacting, and self-assembling. USE - Preparation of boron-nitrogen-mixed graphene hydrogel used for hydrogen storage carrier, electrical double layer capacitor and biosensing applications. ADVANTAGE - The method enables simple and economical preparation of boron-nitrogen-mixed graphene hydrogel under mild reaction conditions.