Effect of Ionomer Dispersibility on Membrane Electrode Assembly for Direct Methanol Fuel Cell

The effect of Nafion loading with spray treatment in the catalyst layer for the Direct Methanol Fuel Cell (DMFC) was investigated. The spray treatment of the membrane electrode assembly (MEA) was effective, and improved the short circuit current up to 378 mA/cm2 at a 0.05 mg/cm2 loading when compare...

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Bibliographic Details
Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2002/12/05, Vol.70(12), pp.931-933
Main Authors: FURUKAWA, Kazuyoshi, OKAJIMA, Keiichi, SUDOH, Masao
Format: Article
Language:English
Subjects:
DMFC
Ionomer
Membrane Electrode Assembly
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Summary:The effect of Nafion loading with spray treatment in the catalyst layer for the Direct Methanol Fuel Cell (DMFC) was investigated. The spray treatment of the membrane electrode assembly (MEA) was effective, and improved the short circuit current up to 378 mA/cm2 at a 0.05 mg/cm2 loading when compared to 307 mA/cm2 for the untreated MEA. The impedance of the MEA was determined by ac impedance spectroscopy. The diameter of the arc at low frequency was decreased by increasing the Nafion loading. The optimum Nafion loading value was 0.05 mg/cm2. The cell performance was dependent on the mass-transfer resistance was caused by the methanol chemisorption.
ISSN:1344-3542
2186-2451
DOI:10.5796/electrochemistry.70.931