Performance characteristics of air-breathing anion-exchange membrane direct ethanol fuel cells

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Abstract

An air-breathing direct ethanol fuel cell (DEFC) with an anion-exchange membrane (AEM) and Pt-free electrodes is designed and investigated. Particular attention is paid to studying the performance characteristics of the air-breathing AEM DEFC. Experimental results reveal that this air-breathing AEM DEFC yields a peak power density as high as 38 mW cm-2 at room temperature, which is comparable to the conventional Pt-based proton exchange membrane direct methanol fuel cells (PEM DMFCs). The overshoot/undershoot behaviors of both the cell voltage and cell temperature are avoided in the air-breathing AEM DEFC due to the use of ethanol-tolerant cathode catalyst. It is also found that the cathode water flooding behavior occurs in this air-breathing AEM DEFC, thus lowering the cell performance.

Original languageEnglish
Pages (from-to)13427-13433
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume38
Issue number30
DOIs
StatePublished - 8 Oct 2013

Keywords

  • Fuel cell Anion-exchange membrane fuel cell Air-breathing direct ethanol fuel cell Anion-exchange membrane Overshoot/undershoot behavior Water flooding

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