▎ 摘　　要

NOVELTY - The preparation method of graphene oxide involves uniformly mixing graphite with oxidizing salt, crushing, peeling and oxidizing by chemical and mechanical force to obtain intermediate, washing the obtained intermediate, and drying. USE - Preparation method of graphene oxide for use in graphene nano-conductive composite material, graphene nano-anticorrosive composite material, conductive electrode, and energy conversion and storage device (claimed). ADVANTAGE - The method enables preparation of graphene oxide with non-toxicity and high yield, in short preparation time, by economical and environmentally-friendly process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of graphene oxide in composite material, conductive electrode and energy conversion and storage device.