Transport phenomena in elevated temperature PEM fuel cells

Puneet K. Sinha, Chao Yang Wang, Uwe Beuscher

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

There is a recognized need for operation of polymer electrolyte membrane (PEM) fuel cells at higher than 80°C for automotive applications. Electrochemically, higher temperature results in better kinetics of oxygen oxidation reaction but more difficult membrane hydration. These consequences call for a detailed study of electrochemical and transport phenomena at such operating temperatures. In this work, a three-dimensional, nonisothermal model was used to investigate the performance of PEM fuel cells operating at 95°C under various operating conditions. The numerical model is first validated against experimental data for a 25 cm2 cell, after which a detailed analysis of species, heat, and charge transport is presented based on a single-channel unit cell. A brief study of the effect of flow-field design on cell performance is also presented. Numerical studies reveal that at 95°C operation, oxygen transport and its depletion along the flow direction play a critical role in cell performance, even under low humidity conditions.

Original languageEnglish (US)
Pages (from-to)B106-B116
JournalJournal of the Electrochemical Society
Volume154
Issue number1
DOIs
StatePublished - Jan 1 2007

All Science Journal Classification (ASJC) codes

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

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