Coupled continuum and network model framework to study catalyst layers of polymer electrolyte fuel cells

Liu, Jiangjin; Medici, Ezequiel F.; Haug, Andrew T.; Cullen, David A.; Tajiri, Kazuya; Allen, Jeffrey S.; Zenyuk, Iryna V.

doi:10.1016/j.ijhydene.2022.03.266

Title: Coupled continuum and network model framework to study catalyst layers of polymer electrolyte fuel cells

Journal Article · Tue Apr 19 00:00:00 EDT 2022 · International Journal of Hydrogen Energy

DOI:https://doi.org/10.1016/j.ijhydene.2022.03.266· OSTI ID:1883715

^[1]; Medici, Ezequiel F. ^[2];

^[3];

^[4]; Tajiri, Kazuya ^[2]; Allen, Jeffrey S. ^[2];

^[5]

Tufts Univ., Medford, MA (United States)
Michigan Technological Univ., Houghton, MI (United States)
3M Company, St. Paul, MN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Tufts Univ., Medford, MA (United States); Univ. of California, Irvine, CA (United States)

The nanostructured thin film (NSTF) catalyst layers which have demonstrated high power densities, mass activities, and exceptional metal and support stability can have limited operational robustness due to their thin thickness and the hydrophilicity of the metal-coated nano whiskers. The dispersed nanostructured thin film (dNSTF) catalyst layers have been developed by dispersing the NSTF Pt whiskers with ionomer and carbon support to increase the thickness and hydrophobicity. Continuum and network models (NM) are coupled through boundary conditions to study the polymer electrolyte fuel cell with a dNSTF cathode catalyst layer. The coupled model combines the computational efficiency of the continuum model with the pore-scale information in the dNSTF cathode catalyst layer of the NM. It captures the special morphology of the partially ionomer/water covered cylindrical whiskers, as well as water percolation through the pore structures and their impact on the cell performance. Here we observe optimal ionomer coverage on whiskers to be 0.5, ionomer to carbon ratio to be 0.9 and higher whisker to carbon ratios to be desired.

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Research Organization:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725; EE0007650

OSTI ID:: 1883715

Alternate ID(s):: OSTI ID: 1867925

Journal Information:: International Journal of Hydrogen Energy, Vol. 47, Issue 40; ISSN 0360-3199

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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08 HYDROGEN
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Title: Coupled continuum and network model framework to study catalyst layers of polymer electrolyte fuel cells

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