Sulfonated pentablock terpolymers as membranes and ionomers in hydrogen fuel cells

In this study, a series of sulfonated hydrocarbon pentablock terpolymers (NEXAR® Polymers) with different ion exchange capacities (1.0, 1.5, and 2.0 meq g−1) were characterized investigated as membranes ionomers in hydrogen fuel cells. All NEXAR® Membranes exhibited higher proton conductivity (>0.2 S cm−1 at 80 °C, 90% RH) than Nafion (the most frequently used polymer membrane cells). The Membrane (with ionomer) also cell performance 50 100% RH. At operating temperatures (80 RH), the performances lower capacity (1.0 was more stable (1.5 g−1). Differences resistances significant differences before after conditions between corroborates results. Optimization (catalyst ink composition, i.e., solids solvent ratio) electrode assemblies Polymer both ionomer investigated. These results show promise for commercially viable low-cost alternative