Abstract
At the heart of the fuel cell resides two electrodes (anode and cathode) sandwiched around a proton exchange membrane. These electrodes are comprised of electrochemically active catalyst, typically platinum based and are either adhered to the membrane electrode assembly (MEA) or directly to the gas diffusion electrodes (GDE). The large-scale fabrication of MEAs or GDEs can help reduce cost and support the viability of mass emergence of fuel cell systems. This study focuses on using a slot die coater to fabricate GDEs using non-supported catalyst inks. It’s worth noting that there are challenges that emerge when using this technique. Some key challenges include ink formulation for proper catalyst suspension, surface properties of the hydrophobic substrate, and maintaining electrode uniformity during deposition. To overcome these challenges, we explore various approaches such as equipment modification, pre-treatment of the substrate, and modifying ink formulations to enhance the reliability of the coating process.
Published Version
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