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Manufacturing protocol and post processing of ultra-thin gas diffusion layer using advanced scanning techniques
Hossein Pourrahmani1,2, Jan Van Herle3
1Group of Energy Materials, École Polytechnique Fédérale de Lausanne, 1951, Sion, Switzerland. Hossein.pourrahmani@epfl.ch.
Scientific Reports
|June 6, 2024
Summary
Researchers developed an ultra-thin, 28.9 μm Gas Diffusion Layer (GDL) using carbon and PTFE. This novel GDL enhances Proton Exchange Membrane Fuel Cell (PEMFC) performance and has potential applications in fuel cells, electrolyzers, and carbon capture.
Area of Science:
- Materials Science
- Electrochemistry
- Chemical Engineering
Background:
- Gas Diffusion Layers (GDLs) are crucial for fuel cell performance, enabling reactant transport and liquid water removal.
- Typical GDLs range from 180-290 μm, impacting device size, cost, and efficiency.
- Thinner GDLs improve reactant kinetics but are challenging to manufacture.
Purpose of the Study:
- To develop a novel manufacturing process for ultra-thin Gas Diffusion Layers (GDLs).
- To produce a GDL with significantly reduced thickness for enhanced fuel cell performance.
- To explore potential applications of the novel GDL beyond fuel cells.
Main Methods:
- Manufacturing of ultra-thin GDL using carbon and Polytetrafluoroethylene (PTFE).
- Measurement of GDL thickness using microscope imaging.
- Characterization of GDL properties for fuel cell and other applications.
Main Results:
- Successfully produced an ultra-thin GDL with a thickness of 28.9 μm.
- The novel GDL utilizes carbon and PTFE as primary materials.
- Demonstrated potential applicability in Proton Exchange Membrane Fuel Cells (PEMFCs), Alkaline Fuel Cells, and electrolyzers.
Conclusions:
- The developed manufacturing process yields a significantly thinner GDL compared to commercial standards.
- This ultra-thin GDL offers improved performance potential for various electrochemical devices.
- The material shows promise for carbon capture applications after functionalization.
