DC Field | Value | Language |
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dc.contributor.author | Jeon, Min-Ku | ko |
dc.contributor.author | Lee, Ki-Rak | ko |
dc.contributor.author | Oh, Kwang-Seok | ko |
dc.contributor.author | Hong, Dae-Sik | ko |
dc.contributor.author | Won, Jung-Yeon | ko |
dc.contributor.author | Li, Shuang | ko |
dc.contributor.author | Woo, Seong-Ihl | ko |
dc.date.accessioned | 2010-05-19T04:50:47Z | - |
dc.date.available | 2010-05-19T04:50:47Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2006-08 | - |
dc.identifier.citation | JOURNAL OF POWER SOURCES, v.158, no.2, pp.1344 - 1347 | - |
dc.identifier.issn | 0378-7753 | - |
dc.identifier.uri | http://hdl.handle.net/10203/18474 | - |
dc.description.abstract | A stability test on direct methanol fuel cells (DMFCs) was carried out at current densities of 100, 150, and 200 mA cm(-2). Each test lasted for 145 h in the three cases. X-ray diffraction, energy dispersive spectroscopy, and scanning electron microscopy were used for analysis of the membrane electrode assemblies (MEAs). The maximum power densities were 93.9, 79.9, and 55.1% of the initial value after operation at 100, 150, and 200 mA cm(-2), respectively. A PtRu black catalyst with an original particle size of 3.3 nm was used for the anode electrode. For the MEAs operated at 100, 150, and 200 mA cm(-2), the PtRu particle sizes increased from the original size to 3.4, 3.9, and 4.2 nm, respectively, while a Pt black catalyst used for the cathode electrode did not change in size. Dissolution of the Ru was observed, and the ratio of (Pt:Ru) changed from (53:47) in the case of the fresh MEA, to (54:46), (56:44), and (73:27) for the MEAs after operation at 100, 150, and 200 mA cm(-2), respectively. The equivalent weight of the Nafion (TM) membrane increased from a weight of 1264 g for a fresh membrane, to a weight of 1322, 1500, and 1945 g with the increases in operating current density to 100, 150, and 200 mA cm(-2), respectively. (c) 2005 Elsevier B.V. All rights reserved. | - |
dc.description.sponsorship | The authors are grateful to Dr. J.-Y. Lee in Korea Institute of Science and Technology and Dr. W. C. Choi in Korea Research Institute of Chemical Technology for their support and guidance. This research was partially funded by the Center for Ultramicrochemical Process Systems (CUPS) sponsored by KOSEF (2005). The authors also would like to thank Research Park/LG Chem, Ltd. and Ministry of Commerce, Industry and Energy for funding this research in the frame work of the Korean government/ industry joint project for the development of 50W direct methanol fuel cell systems. | en |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject | OXIDATION | - |
dc.title | Current density dependence on performance degradation of direct methanol fuel cells | - |
dc.type | Article | - |
dc.identifier.wosid | 000240842800076 | - |
dc.identifier.scopusid | 2-s2.0-33748267090 | - |
dc.type.rims | ART | - |
dc.citation.volume | 158 | - |
dc.citation.issue | 2 | - |
dc.citation.beginningpage | 1344 | - |
dc.citation.endingpage | 1347 | - |
dc.citation.publicationname | JOURNAL OF POWER SOURCES | - |
dc.identifier.doi | 10.1016/j.jpowsour.2005.10.056 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Woo, Seong-Ihl | - |
dc.contributor.nonIdAuthor | Jeon, Min-Ku | - |
dc.contributor.nonIdAuthor | Oh, Kwang-Seok | - |
dc.contributor.nonIdAuthor | Hong, Dae-Sik | - |
dc.contributor.nonIdAuthor | Li, Shuang | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | direct methanol fuel cell | - |
dc.subject.keywordAuthor | performance degradation | - |
dc.subject.keywordAuthor | agglomeration | - |
dc.subject.keywordAuthor | membrane-electrode assembly | - |
dc.subject.keywordPlus | OXIDATION | - |
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