Evaluation of Liquid-feed Direct Methanol Fuel Cell at Near-ambient Temperature for Mobile Applications

The performance of the liquid-feed DMFC system at near-ambient temperature was investigated for mobile applications. The open circuit voltage and the current density at 0.4 V of the liquid-feed DMFC system decreased with the increasing methanol flow rate because of methanol crossover. The open circu...

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Bibliographic Details
Published in:Denki kagaku oyobi kōgyō butsuri kagaku 2002/12/05, Vol.70(12), pp.928-930
Main Authors: OKAJIMA, Keiichi, SUETAKE, Motoki, FURUKAWA, Kazuyoshi, SUDOH, Masao
Format: Article
Language:English
Subjects:
Direct Methanol Fuel Cell
Liquid-feed
Polymer Electrolyte Membrane
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Summary:The performance of the liquid-feed DMFC system at near-ambient temperature was investigated for mobile applications. The open circuit voltage and the current density at 0.4 V of the liquid-feed DMFC system decreased with the increasing methanol flow rate because of methanol crossover. The open circuit voltage of the liquid-feed DMFC system monotonously decreased with the increasing methanol concentration. At a temperature of 300 K and a methanol flow rate of 0.1 mL/min, the open circuit voltage of 0.58 V at the methanol concentration of 0.5 mol/L decreased to 0.46 V at the concentration of 5 mol/L. Meanwhile, the current density was a maximum at 1.5 mol/L but dropped at the concentration of 0.5 mol/L due to a methanol deficiency.
ISSN:1344-3542
2186-2451
DOI:10.5796/electrochemistry.70.928