▎ 摘　　要

NOVELTY - Preparation of wrinkled graphene fibers, involves using a syringe pump to inject the prepared non-liquid crystal graphene oxide solution into a coagulation bath for spinning, locating the injection needle above the coagulation bath and setting a gap between the needle and coagulation bath. USE - Preparation of wrinkled graphene fibers in preparation of supercapacitor, flexible electrodes and wearable electronic device (all claimed). ADVANTAGE - The graphene fiber is stretched to obtain better shear orientation, and the interstitial stretching makes the initial fibers that undergo extrusion swelling shrink in the coagulation bath, and a large number of wrinkled structures appear. The surface of the prepared graphene fiber has a rich fold structure, provides a larger usable specific surface area, is conducive to the storage and transmission of electric charges, and is conducive to the improvement of fiber capacitance.