Hydrogen Permeation in PFSA Membranes with Different Side Chains and ePTFE Fiber Fraction

• DOI: 10.1149/1945-7111/ad5cc4
• Publication Date: 2024-06-27T22:45:54Z
• Authors: Michael A. Yandra...; Jeremy Condon; Andrew J. Steinbach; Melissa Novy; Kirit Patel
• Keywords: Ionomer; Side chain

Hydrogen permeation was measured at 80 °C and four humidities for a series of membranes fabricated from the three most common perfluorosulfonic acid (PFSA) ionomers. In addition, were made with different thicknesses types expanded PTFE (ePTFE) reinforcements. A picture has emerged where constant is lowest shortest side chain decreases decreasing ion exchange capacity (IEC). relationship quantifying impact ePTFE on reducing hydrogen developed showing lower cross over higher fiber content. For both IEC study reinforcement study, permeability trending towards published value pure poly(tetrafluoroethylene) when ionomer CF 2 content or fraction membrane increases. all cases, greatest highest humidities.