▎ 摘　　要

NOVELTY - A perfluorosulfonic acid membrane ion conductivity improving method involves utilizing sulfonated graphene for improving ion conductivity of perfluorosulfonic acid membrane, synthesizing sulfonated graphene by dissolving sulfanilic acid and sodium nitrite in warm water, pouring the solution to hydrochloric acid, placing in ice bath to form aryl diazonium salt, adding solid graphene oxide in water, stirring suffocating to obtain graphene oxide compound. The compound is dropped in aryl diazonium salt, centrifuged, washed and freeze-dried to obtain solid sulfonated graphene. USE - Method for improving ion conductivity of perfluorosulfonic acid membrane. ADVANTAGE - The method enables improving ion conductivity of perfluorosulfonic acid membrane with increased swelling degree and ion conductivity. DETAILED DESCRIPTION - A perfluorosulfonic acid membrane ion conductivity improving method involves utilizing sulfonated graphene for improving ion conductivity of perfluorosulfonic acid membrane, synthesizing sulfonated graphene by dissolving 1.3-4.5 g sulfanilic acid and 0.1-1.5 g sodium nitrite in warm water at 15-25 degrees C, pouring the solution to 20 ml hydrochloric acid under stirring conditions, placing in ice bath for 30-60 minutes to form an aryl diazonium salt, adding 150-500 mg solid graphene oxide in 50-100 ml water, stirring uniformly, dropping into graphene oxide aqueous solution and carrying out sulfonation reaction to obtain a graphene oxide compound. The graphene oxide compound is dropped in aryl diazonium salt, subjected to centrifugation after sulfonation, washed several times with deionized water until neutral to give a sulfonated graphene solution. The sulfonated graphene solution is freeze-dried to obtain solid sulfonated graphene.