▎ 摘　　要

NOVELTY - Novel polydopamine-coated graphene fiber comprises graphene and a polydopamine-derived carbon coating. USE - Novel polydopamine-coated graphene fiber used for wearable devices. ADVANTAGE - The novel polydopamine-coated graphene fiber has high strength, conductivity and toughness properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing novel polydopamine-coated graphene fiber, which involves: (A) introducing polydopamine derived carbon coating on the surface of graphene oxide in situ in the presence of a buffer, under the weakly alkaline condition to prepare the polydopamine as assembling unit coated with graphene oxide; (B) coating graphene oxide assembly unit with poly-dopamine-derived carbon; and (C) performing annealing process.