▎ 摘　　要

NOVELTY - Preparing lignin/graphite-based carbon fiber comprises (i) adding oxidized graphene dispersion liquid with the purified lignin solution, mixing and stirring to obtain composite spinning solution; (ii) utilizing polyelectrolyte complex spinning method to ion-complex the composite spinning solution with the chitosan solution to obtain lignin/graphene oxide composite fibers, and drying at room temperature for many hours under stretching; and (iii) placing the composite fibers in a tube furnace and carbonized at high temperature under a nitrogen atmosphere. USE - The method is useful for preparing lignin/graphite-based carbon fiber. ADVANTAGE - The method is environmentally friendly; has low spinning solution concentration; and endows carbon fiber with higher mechanical property and conductivity.