▎ 摘　　要

NOVELTY - Highly conductive graphene fiber comprises the fiber of graphene along the axial direction in an ordered array with the graphene layer spacing of 0.3-0.4 nm and doping between the graphene layers with iodine bromide, iodine chloride, potassium, calcium, ferric chloride, molybdenum chloride, aluminum chloride and/or copper chloride as dopant, where the dopant comprises 10-30% graphene and the fiber orientation of graphene is 80-90%. USE - The highly conductive graphene fiber is useful in the preparation of flexible solar cells, super capacitor and wearable devices, as light conductors, for ultra light wire and cable that can replace metal copper wire and for generation of power transmission. ADVANTAGE - The method: is simple and controllable; improves conductive properties of graphene fiber; and produces graphene fibers having high mechanical properties and electrical conductivity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing highly conductive graphene fiber comprising (a) taking 1 pts. wt. graphene oxide and 10-100 pts. wt. solvent mixture and ultrasonically dispersing, to obtain graphene oxide spinning liquid, (b) extruding graphene oxide spinning liquid at a rate of 1-100 ml/hour, where the pore size of the spinning head is 30-300 mu m, placing in the coagulating bath at 10-50 degrees C for 5-60 seconds and collecting, to obtain continuous graphene oxide fiber, (c) reducing graphene oxide fibers by the reducing agent, washing and drying, to obtain primary graphite fiber, (d) placing primary graphite fiber in a graphite furnace at 1000-3000 degrees C and atmospheric heat treating for 1-4 hours, to obtain high quality graphene fiber and (e) treating the high quality graphene fiber in the steam of dopant for 1-24 hours.