Effects of porous and dense electrode structures of membrane electrode assembly on durability of direct methanol fuel cells

Young Chul Park, Segoo Kang, Sang Kyung Kim, Seongyop Lim, Doo Hwan Jung, Dok Yol Lee, Yong Gun Shul, Dong Hyun Peck

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17 Citations (Scopus)

Abstract

This study addresses how durability of direct methanol fuel cells (DMFCs) is involved with the electrode structures of membrane electrode assembly (MEA) with different porosity and microstructures. The different electrode structures of the MEAs (porous (MEA-1) and dense (MEA-2) electrode structure) bring about the difference in the reaction kinetics associated with the electrochemical active surface area (ECSA) and in mass transport on the electrodes. The dense electrode structures of the MEA-2 cause the continual non-uniformity of the mass transport-related phenomena at the cathode, and thereby the catalysts of the MEA-2 experience much severer particle growth and agglomeration to decrease ECSA and activity of the catalysts. During the long-term operation, the decay rate of the MEA-2 was faster by more than three times compared to the MEA-1 with the relatively porous electrode structures. These results show that an electrode structure of a MEA is an important factor to govern durability of DMFCs.

Original languageEnglish
Pages (from-to)15313-15322
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number23
DOIs
Publication statusPublished - 2011 Nov 1

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All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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