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The membrane electrode assembly (MEA) is one of the key components of Solid Electrolyte Membrane Fuel Cell and Water Electrolysis system. Generally, a MEA can be fabricated by the three different methods: (i) Catalyst coated membrane (CCM), which is coating catalyst ink onto a membrane directly, (ii) Decal transfer CCM, which is casting catalyst layer(CL) on a substrate (e.g. polytetrafluoroethylene, polyimide, etc.) and then transferring the CLs onto a membrane under high temperature and pressure, and (iii) Catalyst coated substrate (CCS), which is coating catalyst ink directly on Gas diffusion layer (GDL) (a GDL with CL is called a gas diffusion electrode (GDE)). A MEA is constructed by pressing a CCM between two GDLs, or a Polymer electrolyte membrane (PEM) between two GDEs. MEAs fabricated by CCM deliver better performance than by CCS, resulting from lower resistance due to improved ionic contact between CLs and membrane. However, CCM fabrication by direct coating on very thin membranes has been rarely demonstrated. Hydrogine Tech. has successfully demonstrated the direct coating of various catalyst inks on various membranes for PEMFC, PEMWE and Anion Exchange Membrane Water Electrolysis (AEMWE). Hydrogine Tech.’s ink preparation and coating techniques ensure flawless catalyst layer structure with high quality for all the applications of CCM in hydrogen and fuel cell industry.

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