Journal
POLYMER ELECTROLYTE FUEL CELLS 16 (PEFC 16)
Volume 75, Issue 14, Pages 25-34Publisher
ELECTROCHEMICAL SOC INC
DOI: 10.1149/07514.0025ecst
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Funding
- U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy [DE-EE0007271]
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Reducing the use of precious metal in a proton exchange membrane fuel cell is a key challenge in mass commercialization of fuel cell electric vehicles. However, as Pt loadings are reduced, fuel cell performance losses due to mass transport phenomena become more localized to the Pt and ionomer interface. In this paper, we provide an overview of how we use in-situ electrochemical diagnostics and modeling to understand the performance of low-Pt electrodes, identify their key limiting factors, and guide our catalyst layer development. In particular, diagnostics used to quantify the local-Pt oxygen transport resistance and the ionomer adsorption on the Pt surface will be discussed.
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