▎ 摘　　要

NOVELTY - Improving chemical oxidation stability of perfluorosulfonic acid membrane comprises coating a resin layer doped with additives, preferably 100 pts. wt. perfluorosulfonic acid resin dispersion (20%), 1-10 pts. wt. modified graphene quantum dots, 1-20 pts. wt. metal oxide of heteropoly acid and 0-5 pts. wt. metal organic compound containing delocalized large pi bond of the perfluorosulfonic acid film on one side or both sides. USE - The method is useful for improving chemical oxidation stability of perfluorosulfonic acid membrane. ADVANTAGE - The method: is simple, easy to operate snd is economical. The membrane: has good mechanical properties, chemical stability, high proton conductivity and long service life; does not easily degrade; and has wide prospects of industrialization. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a perfluorosulfonic acid membrane, which is improved by the above described method.