Crosslinked sulfonated polyphenylenes: overcoming the performance–gas permeation–stability trilemma in water electrolyzers

Abstract

Thermal crosslinking of Pemion®, a highly sulfonated polyphenylene membrane, is used as a viable route to combine high proton conductivity, low gas permeability and mechanical robustness. Crosslinked Pemion® not only outperforms any other membrane reported so far, as a PFAS-free membrane, it is also considered to be environmentally more benign.