Influence of pore-size distribution of diffusion layer on mass-transport problems of proton exchange membrane fuel cells

Chang Sun Kong, Do Young Kim, Han Kyu Lee, Yong Gun Shul, Tae Hee Lee

Research output: Contribution to journalArticle

268 Citations (Scopus)

Abstract

The influence of pore-size distribution of the diffusion layer on mass-transport problems of proton exchange membrane fuel cells (PEMFCs) is investigated using electrodes with hydrophobic diffusion layers for which the pore-size distribution is designed by pore-former and heat treatment. It is confirmed that the pore-size distribution of the diffusion layer is a more critical parameter for mass-transport processes within the electrode and for cell performance characteristics than the total porosity itself. Data obtained from mercury intrusion porosimetry, single-cell performance tests and ac impedance analyses indicate that the performance loss due to mass-transport limitations can be reduced by enlarging the macropore volume in the diffusion layer. The water flooding problem is discussed in terms of condensation phenomena which are dependent on pore-size.

Original languageEnglish
Pages (from-to)185-191
Number of pages7
JournalJournal of Power Sources
Volume108
Issue number1-2
DOIs
Publication statusPublished - 2002 Jun 1

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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