Cheaper Polymeric Electrolyte Membranes for Fuel Cells

Proton-conductive (solid-electrolyte) membranes made from sulfonated poly(phenylether sulfone), plus membrane/electrode assemblies containing these membranes, have been developed for use in methanol fuel cells. These membranes offer two important advantages over traditional fuel-cell membranes made of a commercial perfluorosulfonic acid-based ion-exchange polymer: