Impact of of a new concept for gas diffusion layers omitting the fibre substrate on the water management of PEM fuel cells
Traditional PEM fuel cell setups include Gas Diffusion Layers (GDLs) on anode and cathode. The GDLs consist of a fibre substrate of ca. 150-200 µm thickness and a Microporous Layer (MPL) of 30-60 µm thickness. The functions of the GDLs are gas and water transport, providing electrical and heat conductivity and mechanical support. We are developing a new concept replacing the GDL substrate by a standalone layer of similar composition and thickness as the traditional MPL layer. By improving transport properties, higher cell power can be expected. The influence of this innovation on the water inventory of the layers inside the cell is still unclear. Water discharge capability can be enhanced by optimum engineering of porous structure in the GDL. An investigation of the influence of the pore structure as well as the surface treatment variation of the newly designed component on water management processes and cell performance will be conducted in this study. In addition, cells of full channel length will be investigated. Different material variations will be applied to evaluate the corresponding water management. Water management and thereby, performance is intended to be improved.
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SCHOLTA, DR. Joachim; KACZEROWSKI Juergen; LIEBERT Michael; SAADAT Sepehr; Michael A. Schmid; TENGATTINI Alessandro; WIEDEMANN Benjamin and WILHELM, DR. Florian. (2023). Impact of of a new concept for gas diffusion layers omitting the fibre substrate on the water management of PEM fuel cells. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-06-26
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