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- W2171662746 abstract "A single cell micro-direct methanol fuel cell (micro-DMFC) was investigated using electrochemical impedance spectroscopy. The electrodes consisted of thin, flexible polymer (SU8) film microchannel structures fabricated in-house using microfabrication techniques. AC impedance spectroscopy was used to separate contributions to the overall cell polarization from the anode, cathode and membrane. A clear distinction between the different electrochemical phenomena occurring in the micro-DMFC, especially the distinction between double layer charging and Faradaic reactions was shown. The effect of fuel flow rate, temperature, and anode flow channel structure on the impedance of the electrode reactions and membrane/electrode double layer charging were investigated. Analysis of impedance data revealed that the performance of the test cell was largely limited by the presence of intermediate carbon monoxide in the anode reaction. Higher temperatures increase cell performance by enabling intermediate CO to be oxidized at much higher rates. The results also revealed that serpentine anode flow microchannels show a lower tendency to intermediate CO coverage and a more stable cell behavior than parallel microchannels." @default.
- W2171662746 created "2016-06-24" @default.
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- W2171662746 date "2010-11-15" @default.
- W2171662746 modified "2023-09-26" @default.
- W2171662746 title "Electrochemical impedance spectroscopy analysis of a thin polymer film-based micro-direct methanol fuel cell" @default.
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- W2171662746 doi "https://doi.org/10.1016/j.jpowsour.2010.06.008" @default.
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