The degradation study of Nafion/PTFE composite membrane in PEM fuel cell under accelerated stress tests

An overview of cracks and interfacial voids in membrane electrode assemblies in polymer electrolyte fuel cells

“…A thicker CL with 10m in thickness was demonstrated to suppress mechanical deformation in the MEA. Fractures along a boundary of MEAs and cracks/delamination in the MEAs were also reported after relative humidity (RH) cycling and load cycling applied in an accelerated stress test (Wu, et al, 2014).…”

“…Freeze and thaw cycles simulating cold startup and shutdown in a sub-zero temperature environment are well recognized to induce cracks and interfacial voids in the MEAs Mench, 2007, Lim, et al, 2010). Relative humidity (RH) cycling and load cycling are also reported to cause degradation of the MEA with mechanical damages (Hashimasa, et al, 2014, Wu, et al, 2014. As both manufacturing and operating process of PEFCs gives rise to cracks and void formation in MEAs, we are going to revisit recent findings in the literature in the following section.…”

The impact of using a proton exchange membrane on alkaline fuel cell performance

“…To evaluate the performance of the hydrogen fuel cell, preactivated steel (Pb-Sn 5%) electrodes were used for a period of 3 days in 1M H 2 SO 4 solution to form an oxide fi lm on the surface thereof, allowing better electrical conductivity and protecting it from corrosion as well [3,4]. The steel anode consists of two steel plates, each with a surface of 73 cm 2 .…”

A Comprehensive Fractal Approach in Determination of the Effective Thermal Conductivity of Gas Diffusion Layers in Polymer Electrolyte Membrane Fuel Cells

“…In application fuel cell in transport, the frequency starting up and shutting down or nearly power random cycle load are effect the humidity condition of Nafion membrane and also to GDL. (Wu et al, 2014) The main challenge in the design of fuel cells is to transfer heat from the gas diffusion layer (GDL) in the polymer electrolyte membrane due to the result of a chemical reaction to produce electricity. Analysis of this process requires the determination of the effective thermal conductivity and thermal contact resistance is also associated with the interface between the GDL and the adjacent surface or coating.…”