Mitigation and Diagnosis of Pin-Hole Formation in Polymer Electrolyte Membrane Fuel Cells

Research output: NRELPoster

Abstract

In this work, we implement a calendering technique to flatten stray fibers within the gas diffusion media, thereby mitigating pin-hole formation in the hot-pressed MEAs. We have investigated the influence of calendering on the long-term durability for several types of gas diffusion electrodes (GDEs) using a combined chemical and mechanical accelerated stress test (AST). The calendered MEAs demonstrate an average AST lifetime improvement of 77% relative to the as-fabricated MEAs.
Original languageAmerican English
PublisherNational Renewable Energy Laboratory (NREL)
StatePublished - 2023

Publication series

NamePresented at the 2023 U.S. Department of Energy (DOE) Hydrogen Program Annual Merit Review and Peer Evaluation Meeting (AMR), 5-8 June 2023, Arlington, Virginia

NREL Publication Number

  • NREL/PO-5900-86460

Keywords

  • AMR
  • gas diffusion
  • Million Mile Fuel Cell Truck Consortium
  • PEM fuel cell
  • pin-hole

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