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Gas Diffusion Layers for MEAs

Mott gas diffusion layers can be tailored specifically to your application to provide you the best performance in terms of mass transport, conductivity, and materials compatibility. Our sheet can be customized in terms of porosity, thickness, and rigid contact surface depending on your needs. Additionally, Mott has the most extensive material selection in the industry ranging from titanium for standard applications, nickel 200 and 430 SS for SOFCs, and specialty alloys such as niobium for aerospace. For customers working on gas generation applications, Mott supplies PTLs down to .010″ thinness for better reaction times.

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Have a question? Can’t find what you’re looking for? Call us at 860.747.6333, or submit an information request form and someone will get back to you within 48 hours.

Literature & Data Sheets

Typical Applications

Gas Diffusion Layers

Overview of various customization options for Mott GDLs

Porous Transport Layer (PTL) Case Study

Mott Porous Transport Layers achieve high power densities in gas generation applications due to a proprietary ultra-thin design resulting in better mass transport and a smaller footprint.

Mott Fuel Cell and Battery Membranes

Learn about Mott capabilities for fuel cell and battery membranes.

Product Specs


Common Lengths – 10″, 12″, 24″, 40″

Sheet can be laser cut or sheered into smaller pieces if needed. If you need a custom length, please consult factory.


Common Widths – Less than 10”

Sheet can be laser cut or sheered into smaller pieces if needed. If you need a custom width, please consult factory.


Common Thicknesses – .010-.125” (dependent on media grade)

Custom lengths available, consult factory

Media Grades

Common Media Grades – .2, .5, 2, 5, 10, 20, 40, 100

Custom media grades available upon request, consult factory


Common alloys – 316LSS, Titanium, Nickel 200, Hastelloy C-276, Inconel 600

Custom alloys available upon request, consult factory


Alloys with temperature resistance up to 1700 degrees Fahrenheit are available.

Custom alloys available to accommodate unique operating temperatures, consult factory

Our Design Capabilities

  1. Application Engineering – Need consultation on your design? Our team of application engineers are ready to help you determine the right part for your design. With decades of experience working with the world’s largest technical and performance brands, we’re eager to solve complex problems with you as well.
  2. Customer Innovation Center – We enjoy working with customers on complex projects. In fact, we’ve dedicated an entire facility to it. Want to join us for various lab testing and engineering consultation sessions? Visit our Customer Innovation Center in Connecticut to develop a solution for your unique application.
  3. Rapid Prototyping Cell – Trying to determine the feasibility of your design as fast as possible? Use our rapid prototyping cell to turn around prototypes in as little as 2 weeks. Our engineers will work with equipment similar to our manufacturing facility to provide with you with manufacturable, economical design.
  4. Additive Manufacturing – If you’re looking for the most uniform porosity or a non-traditional design, look no further than working with out porous 3D printing team. We can create controlled porosity designs with various density gradients in non-traditional shapes to satisfy the most unique design request. Our technology allows us to print parts with both solids and porous in a single print cycle

Relevant Services

Lab Testing – If you need data packages or feasibility testing for your part prior to installation, we’re happy to work with you. We’ll use our lab center to perform various characterization and performance tests to ensure your parts are meeting strict specifications prior to you receiving them.

Computational Fluid Dynamics – If you would like to model your process fluids interaction with your Mott requested part, ask your Mott representative how we can model it using CFD software.

Engineering Memberships – If you’re constantly working on complex designs that require the highest standards of engineering support, ask about our membership rates to our lab, which will allow you discounted rates to various lab testing, prototyping, and engineering resources.