▎ 摘　　要

NOVELTY - Manufacture of sulfur-doped graphene involves adding a sulfur precursor to a sulfuric acid solution to prepare a mixed solution, mounting a graphite foil and a platinum wire in the mixed solution, connecting a positive electrode to the graphite foil and a negative electrode to the platinum wire, peeling the sulfur-doped graphene by applying a voltage of 7-20 V, washing the exfoliated sulfur-doped graphene, and heat-treating. USE - Manufacture of sulfur-doped graphene used for bifunctional electrochemical catalyst (claimed) used for oxygen evolution and reduction reactions in fuel cell and secondary battery e.g. lithium-ion battery. ADVANTAGE - The method economically produces sulfur-doped graphene having excellent physicochemical property and reproducibility, and capable of improving bifunctional catalyst activity of the electrochemical catalyst in oxygen evolution and reduction reactions. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for bifunctional electrochemical catalyst.