Investigation of degradation behavior of membrane electrode assembly with polytetrafluoroethylene/Nafion composite membrane

Molecular dynamics simulation of inhomogeneous density distribution mechanism of Ultra-Thin perfluoro sulfonic acid ionomer films on Triple-phase interface of PEM fuel cells

“…The proton exchange membrane (PEM) fuel cell is a clean power generation component with high energy conversion rate and high energy density [1,2]. In PEM fuel cells, the reactions take place at the triple-phase interface of the catalytic layer (CL).…”

Degradation mechanism study of PTFE/Nafion membrane in MEA utilizing an accelerated degradation technique

“…However, once the membranes ruptured (880th and 1680th cycle for PTFE/Nafion and Nafion 211, respectively), the OCV and, in particular, the ESA, dropped dramatically. After the membrane ruptured, the ESA values could not be utilized to judge the status of the MEA due to the large gas crossover [25], which lead to losing the function of the reference electrode. Therefore, the ESA was almost zero at the end of the ADT period while the MEAs continued operating.…”

Implementation of a phenomenological evaporation model into a porous network simulation for water management in low temperature fuel cells

“…Water management in a PEM fuel cell is a delicate balance; the membrane requires full saturation to operate to the best of its ability while the catalyst layer, which resides immediately adjacent to the membrane, needs to be kept dry and free from water to optimize platinum reaction sites. If either of these conditions falls too far below optimal, the fuel cell will become flooded and the oxygen will not be able to reach the reaction sites stopping the reaction, or the membrane will become dehydrated and stop conducting protons and eventually breaking the side chains on the membrane permanently reducing proton conductivity, thus resulting in reduced efficiency 11 . The reaction of hydrogen ions and oxygen occur in the cathode side which means that the water is generated at the cathode.…”