Green hydrogen starts with smart materials. At the core of hydrogen production is a component often overlooked, yet absolutely critical: the Porous Transport Layer (PTL). In PEM and AEM electrolyzers, the PTL sits between the catalyst layer and the flow field. This porous, metallic structure plays a pivotal role in optimizing the performance, efficiency, and durability of the electrolyzer. A high-performance PTL supports efficient water electrolysis by:
Facilitating mass transfer of water and oxygen
Providing thermal management across the cell
Providing electrical conductivity across the cell
Acting as a corrosion resistant mechanical support
As electrolyzer technology evolves, so do the demands. But different electrolyzer chemistries require different PTL materials. PEM Electrolyzers are acidic and oxidative, and typically use titanium. AEM Electrolyzers are an alkaline environment, utilizing nickel and stainless steel. Our portfolio is engineered to support both systems, with materials selected for chemical compatibility and cost efficiency. From scaling up production to achieving longer lifetimes and higher efficiency, tomorrow’s challenges require advanced material solutions today.
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PEM, or proton exchange membranes, enable hydrogen ions to flow from the anode to the cathode, driving reliable electrolyzer performance. This thin layer separates electrodes while supporting power applications from transportation to stationary energy systems.
AEM, or anion exchange membranes, enable hydrogen production using hydroxide ion transport in alkaline environments. AEM technology reduces corrosion risk, supports the use of low-cost metals, and shows strong potential for producing renewable hydrogen at lower costs.
Small layers, big impact
Our new white paper explores the advantages of metal fiber media for water electrolysis applications. From flexibility to porosity and even efficient mass transport, there's a lot to learn about our porous transport layers (PTLs).
