Long-term durability test for direct methanol fuel cell made of hydrocarbon membrane

Title
Long-term durability test for direct methanol fuel cell made of hydrocarbon membrane
Authors
Joghee prabhuramN. Nambi Krishnan최백범임태훈하흥용김수길
Keywords
Direct methanol fuel cell; Long-term durability; Hydrocarbon membrane; Membrane electrode assembly
Issue Date
2010-07
Publisher
International journal of hydrogen energy
Citation
VOL 35, NO 13, 6924-6933
Abstract
A long-term durability test has been conducted for a direct methanol fuel cell (DMFC) using the commercial hydrocarbon membrane and Nafion ionomer bonded electrodes for 500 h. Membrane electrode assembly (MEA) made by a decal method has experienced a performance degradation about 34% after 500 h operation. Cross-sectional analysis of the MEA shows that the poor interfacial contact between the catalyst layers and membrane in the MEA has further deteriorated after the durability test. Therefore, the internal resistance of a cell measured by electrochemical impedance spectroscopy (EIS) has considerably increased. The delamination at the interfaces is mainly attributed to incompatibility between polymeric materials used in the MEA. Furthermore, X-ray diffraction (XRD) analysis reveals that the catalyst particles have grown; thereby decreasing the electrochemical surface area. Electron probe micro analysis (EPMA) shows a small amount of Ru crossover from anode to cathode; and its effect on the performance degradation has been analyzed.
URI
http://pubs.kist.re.kr/handle/201004/37555
ISSN
0360-3199
Appears in Collections:
KIST Publication > Article
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