Development of high-power electrodes for a liquid-feed direct methanol fuel cell

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

Based upon Nafion 112 membrane, membrane-electrode assemblies for a liquid-feed direct methanol fuel cell (DMFC) were fabricated by using a novel method of modified Nafion solution and tape-casting, with unsupported Pt-Ru as an anode catalyst and carbon supported 40wt.% Pt as a cathode catalyst. The amounts of catalyst loading were controlled to be 4mg/cm2 in the anode and 1.3mg/cm2 in the cathode. Morphological characteristics of anode and cathode were examined by scanning electron microscopy (SEM). A time-delayed activation effect was found in single cell tests and attributed to time-dependent wetting behavior of Nafion polymers within both catalyst layers. A high compression of the single cell leads to a remarkable decrease in diffusion-limiting current density, caused by hydrophilic broken fibers and cleavage-like defects generated during excessive compression of the cell. A maximum power density of 0.21W/cm2 is achieved in 2M CH3OH solution at 90°C under the operating condition of non-pressurized anode side and non-humidified air pressurized to 15psi.

Original languageEnglish (US)
Pages (from-to)145-150
Number of pages6
JournalJournal of Power Sources
Volume113
Issue number1
DOIs
StatePublished - Jan 1 2003

Fingerprint

Direct methanol fuel cells (DMFC)
fuel cells
Anodes
anodes
methyl alcohol
catalysts
Electrodes
Catalysts
Cathodes
electrodes
cathodes
Liquids
liquids
Compaction
cells
membranes
Membranes
Tapes
assemblies
tapes

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

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abstract = "Based upon Nafion 112 membrane, membrane-electrode assemblies for a liquid-feed direct methanol fuel cell (DMFC) were fabricated by using a novel method of modified Nafion solution and tape-casting, with unsupported Pt-Ru as an anode catalyst and carbon supported 40wt.{\%} Pt as a cathode catalyst. The amounts of catalyst loading were controlled to be 4mg/cm2 in the anode and 1.3mg/cm2 in the cathode. Morphological characteristics of anode and cathode were examined by scanning electron microscopy (SEM). A time-delayed activation effect was found in single cell tests and attributed to time-dependent wetting behavior of Nafion polymers within both catalyst layers. A high compression of the single cell leads to a remarkable decrease in diffusion-limiting current density, caused by hydrophilic broken fibers and cleavage-like defects generated during excessive compression of the cell. A maximum power density of 0.21W/cm2 is achieved in 2M CH3OH solution at 90°C under the operating condition of non-pressurized anode side and non-humidified air pressurized to 15psi.",
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Development of high-power electrodes for a liquid-feed direct methanol fuel cell. / Lim, C.; Wang, Chao-yang.

In: Journal of Power Sources, Vol. 113, No. 1, 01.01.2003, p. 145-150.

Research output: Contribution to journalArticle

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