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Designer diffusion media microstructures enhance polymer electrolyte fuel cell performance.

Rens J Horst1, Ralph van der Linde1, Rémy R Jacquemond1

  • 1Electrochemical Materials and Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology PO Box 513 5600 MB Eindhoven Netherlands a.forner.cuenca@tue.nl r.j.horst@tue.nl ralphvanderlinde92@gmail.com r.r.jacquemond@tue.nl b.liu@tue.nl.

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Summary
This summary is machine-generated.

Researchers developed a new, scalable method using non-solvent induced phase separation (NIPS) to create advanced carbon-based gas diffusion media for fuel cells. This technique allows precise control over microstructure, enhancing performance and reducing costs.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Chemical Engineering

Background:

  • Gas diffusion media are critical for fuel cell performance, enabling gas/liquid transport and conductivity.
  • Current methods offer limited control over microstructure, hindering optimization for advanced architectures.
  • There is a need for scalable, cost-effective fabrication of diffusion media with tailored porosity.

Purpose of the Study:

  • To introduce a scalable, bottom-up fabrication method for carbon-based diffusion media using non-solvent induced phase separation (NIPS).
  • To demonstrate tunable microstructures, including isoporous and bimodal porosity, for improved multiphase transport.
  • To correlate microstructural features with fuel cell performance and assess economic viability.

Main Methods:

  • Non-solvent induced phase separation (NIPS) for fabricating carbon-based diffusion media.
  • Systematic variation of processing parameters to control microstructure.
  • Microscopy, porosimetry, electrochemical diagnostics, and techno-economic analysis for characterization and benchmarking.

Main Results:

  • Successfully produced mechanically robust diffusion media with tunable in-plane and through-plane porosity.
  • Demonstrated correlation between microstructural features and improved water management and gas transport in fuel cells.
  • NIPS fabrication shows potential for cost-effectiveness and scalability compared to conventional methods.

Conclusions:

  • NIPS is a versatile and industrially relevant method for next-generation gas diffusion media.
  • Tailored microstructures via NIPS can significantly optimize fuel cell performance.
  • This approach offers new design freedoms to reduce fuel cell system costs.