AC-Impedance Investigation of Different MEA Configurations for Passive-Mode DMFC Mini-Stack Applications

被引：11

作者：

Baglio, V. ^{[1
]}

Stassi, A. ^{[1
]}

Matera, F. V. ^{[1
]}

Kim, H. ^{[2
]}

Antonucci, V. ^{[1
]}

Arico, A. S. ^{[1
]}

机构：

[1] CNR ITAE, I-98126 Messina, Italy

[2] Seoul Natl Univ, Dept Chem, Seoul 151747, South Korea

来源：

FUEL CELLS | 2010年 / 10卷 / 01期

关键词：

Direct methanol fuel cell; Methanol cross-over; Membrane-electrode assemblies; Passive mode; Mini-stack; METHANOL FUEL-CELLS; PERFORMANCE; ELECTRODE; OPTIMIZATION; ARCHITECTURE; PARAMETERS; DESIGN; ANODES; WATER;

D O I：

10.1002/fuce.200900066

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Membrane-electrode assemblies (MEAs) characterised by different hydrophobic-hydrophilic properties were investigated in a passive Direct methanol fuel cell (DMFC) mono-polar mini-stack at room temperature. These properties were modulated by varying the amount of Nafion or replacing the ionomer in the catalytic layer with polytetrafluoroethylene (PTFE). Impedance spectroscopy provided valuable information with respect to the limiting processes occurring during fuel cell operation. Methanol crossover, especially in the presence of high methanol concentration, played a major role in determining the overall performance. The development of a methanol impermeable membrane appears crucial for increasing the performance of DMFC devices for portable applications.

引用

页码：124 / 131

页数：8

共 46 条

[1] Effect of oxygen and methanol supply modes on the performance of a DMFC employing a porous plate [J].