▎ 摘　　要

NOVELTY - A graphene fiber is prepared by dispersing graphite oxide in ultrapure water at room temperature, performing ultrasonic stirring to obtain dilute dispersion of graphite oxide, adding sodium deoxycholate, stirring to obtain sodium deoxycholate/graphene oxide gel in which mass ratio of graphite oxide, sodium deoxycholate, and ultrapure water is 0.1-0.4:1-4:10, washing sodium deoxycholate/graphene oxide gel in anhydrous ethanol using injector, sucking anhydrous ethanol, evaporating to obtain graphite oxide dilute fiber, adding hydroiodic acid to react for 2-3 hours, washing, and drying. USE - Preparation of graphene fiber for energy storage device, photovoltaic device, and sensor. ADVANTAGE - Graphene fiber has high conductivity and flexibility, and preparation process is simple and environment-friendly. DESCRIPTION OF DRAWING(S) - The drawing shows Raman spectra of graphene fiber.