Modeling and experimental validation of Pt loading and electrode composition effects in PEM fuel cells

Liang Hao, Koji Moriyama, Wenbin Gu, Chao Yang Wang

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

A low platinum loading model, considering both the platinum loading and platinum particle distribution on carbon support, is developed. This model takes into account the interfacial transport resistances at ionomer, water film and Pt particle surfaces in order to capture the effects of Pt loading and electrode composition on fuel cell performance. After coupling this electrode model into a comprehensive PEM fuel cell model, i.e. M2 model, experimental validation is performed for a wide range of Pt loading from 0.2 to 0.025 mg/cm2 for two electrode compositions with and without carbon dilution. Good agreement between the predicted and measured polarization curves is achieved under wide-ranging operating conditions. The agglomerate size effect is also examined and it is shown that the agglomerates have virtually no effect on cell performance for agglomerate radius smaller than 150 nm. Since in realistic fuel cell catalyst layers, agglomerates may not exist, or may only exist with sizes no larger than 150 nm based on SEM observations, the present work suggests that the standard homogeneous electrode model is suitable and sufficient for analyses of transport losses in PEM fuel cell electrodes where interfacial transport resistances exist.

Original languageEnglish (US)
Pages (from-to)F854-F867
JournalJournal of the Electrochemical Society
Volume162
Issue number8
DOIs
StatePublished - Jan 1 2015

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Composition effects
Fuel cells
Electrodes
Platinum
Carbon
Ionomers
Chemical analysis
Dilution
Polarization
Scanning electron microscopy
Catalysts
Water

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

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abstract = "A low platinum loading model, considering both the platinum loading and platinum particle distribution on carbon support, is developed. This model takes into account the interfacial transport resistances at ionomer, water film and Pt particle surfaces in order to capture the effects of Pt loading and electrode composition on fuel cell performance. After coupling this electrode model into a comprehensive PEM fuel cell model, i.e. M2 model, experimental validation is performed for a wide range of Pt loading from 0.2 to 0.025 mg/cm2 for two electrode compositions with and without carbon dilution. Good agreement between the predicted and measured polarization curves is achieved under wide-ranging operating conditions. The agglomerate size effect is also examined and it is shown that the agglomerates have virtually no effect on cell performance for agglomerate radius smaller than 150 nm. Since in realistic fuel cell catalyst layers, agglomerates may not exist, or may only exist with sizes no larger than 150 nm based on SEM observations, the present work suggests that the standard homogeneous electrode model is suitable and sufficient for analyses of transport losses in PEM fuel cell electrodes where interfacial transport resistances exist.",
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Modeling and experimental validation of Pt loading and electrode composition effects in PEM fuel cells. / Hao, Liang; Moriyama, Koji; Gu, Wenbin; Wang, Chao Yang.

In: Journal of the Electrochemical Society, Vol. 162, No. 8, 01.01.2015, p. F854-F867.

Research output: Contribution to journalArticle

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