▎ 摘　　要

NOVELTY - Quickly preparing crosslinked reduced graphene oxide-based flexible self-supporting film electrode comprises: (i) uniformly mixing high theoretical capacity material with graphene oxide dispersion liquid to form uniform mixed solution; where the theoretical capacity of the high theoretical capacity material is greater than 400 mAh g-1; (ii) freeze-drying mixed solution to obtain graphene oxide-based composite material; and (iii) quickly crosslinking and reducing graphene oxide-based composite material by using hot ammonium sulfide solution at room temperature environment, and freeze-drying. USE - The method is useful for quickly preparing crosslinked reduced graphene oxide-based flexible self-supporting film electrode. ADVANTAGE - The crosslinked reduced graphene oxide-based flexible self-supporting film electrode fully exerts characteristics of high specific capacity between different components and excellent mechanical performance and high conductivity of the reduced graphene oxide, which can effectively buffer volume expansion effect in circulating process.