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

263 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

Fingerprint

Proton exchange membrane fuel cells (PEMFC)
fuel cells
Pore size
Mass transfer
membranes
porosity
protons
Electrodes
Mercury
Condensation
electrodes
Porosity
performance tests
Heat treatment
cells
intrusion
Water
heat treatment
condensation
impedance

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

Cite this

Kong, Chang Sun ; Kim, Do Young ; Lee, Han Kyu ; Shul, Yong Gun ; Lee, Tae Hee. / Influence of pore-size distribution of diffusion layer on mass-transport problems of proton exchange membrane fuel cells. In: Journal of Power Sources. 2002 ; Vol. 108, No. 1-2. pp. 185-191.
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Influence of pore-size distribution of diffusion layer on mass-transport problems of proton exchange membrane fuel cells. / Kong, Chang Sun; Kim, Do Young; Lee, Han Kyu; Shul, Yong Gun; Lee, Tae Hee.

In: Journal of Power Sources, Vol. 108, No. 1-2, 01.06.2002, p. 185-191.

Research output: Contribution to journalArticle

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AB - 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.

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