Poly(p-phenylene)-based membranes with cerium for chemically durable polymer electrolyte fuel cell membranes

• DOI: 10.1016/j.heliyon.2024.e26680
• Publication Date: 2024-02-19T17:34:52Z
• Authors: Abdul Kodir; Seunghee Woo; Sang-Hun Shin; Soonyong So; Duk Man Yu; Hyejin Lee; Dongwon Shin; Jang Yong Lee; Seok-Hee Park; Byungchan Bae
• Keywords: Social sciences (General); H1-99; Q1-390; Science (General); Hydrocarbon membrane; Cerium; Antioxidant; Fuel cells; Durability; Research Article

A poly(p-phenylene)-based multiblock polymer is developed with an oligomeric chain extender and cerium (CE-sPP-PPES + Ce3+) to realize better performance durability in proton exchange membrane fuel cells. The evaluated single cells at 80 °C 100% 50% relative humidity (RH). accelerated stability test conducted 90 30% RH, during which linear sweep voltammetry hydrogen permeation detection are monitored periodically. Results demonstrate that the conductivity of pristine hydrocarbon membranes superior PFSA membranes, crossover significantly lower. In addition, a composite containing performs similarly membrane, particularly low RH levels. Adding CE-sPP-PPES Ce3+ improves their chemical significantly, open circuit voltage decay rate only 89 μV/h for 1000 h. maintained across tests, as confirmed by current density. short-circuit resistance indicates thinning less likely occur. Collectively, these results potential alternative cell applications.