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The effect of the MEA preparation procedure on both ethanol crossover and DEFC performance

Tipo de material: TextoTextoSeries ; Journal of Power Sources, 140(1), p.103-110, 2005Trabajos contenidos:
  • Song, S
  • Wang, G
  • Zhou, W
  • Zhao, X
  • Sun, G
  • Xin, Q
  • Kontou, S
  • Kontou, S
Tema(s): Recursos en línea: Resumen: In the present work, the changes of Nafion®-115 membrane porosity in the presence of ethanol aqueous solutions of different concentrations were determined by weighing vacuum-dried and ethanol solution-equilibrated membranes. It was found that membrane porosity increases as ethanol concentration increases. Membrane electrode assemblies (MEAs)have been prepared by following both the conventional and the decal transfer method. The ethanol crossover through these two MEAs was electrochemically quantified by a voltammetric method. A 10 h stability test of direct ethanol fuel cell (DEFC)at a current density of 50mAcm-2 was carried out. It was found that the electrode preparation procedure has an obvious effect on ethanol crossover and direct ethanol fuel cell's performance and stability. The single DEFC test results showed that about 15 and 34
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In the present work, the changes of Nafion®-115 membrane porosity in the presence of ethanol aqueous solutions of different concentrations were determined by weighing vacuum-dried and ethanol solution-equilibrated membranes. It was found that membrane porosity increases as ethanol concentration increases. Membrane electrode assemblies (MEAs)have been prepared by following both the conventional and the decal transfer method. The ethanol crossover through these two MEAs was electrochemically quantified by a voltammetric method. A 10 h stability test of direct ethanol fuel cell (DEFC)at a current density of 50mAcm-2 was carried out. It was found that the electrode preparation procedure has an obvious effect on ethanol crossover and direct ethanol fuel cell's performance and stability. The single DEFC test results showed that about 15 and 34

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