Used as a proton exchange membrane in fuel cells, enabling efficient energy conversion by allowing proton conduction while blocking electrons. Widely applied in electrolyzers for hydrogen production due to its excellent chemical and thermal stability. Serves as a catalyst binder in electrochemical devices, improving performance and durability. Employed in sensors and electrochemical reactors for its selective ion transport properties. Also utilized in specialty coatings where high proton conductivity and resistance to harsh environments are required.