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Impedance Analysis on Transient Behavior of DMFC Anodes during Preconditioning Process
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Joon-Hee | - |
dc.contributor.author | Lee, Ho-In | - |
dc.contributor.author | Hong, Seong-Ahn | - |
dc.contributor.author | Ha, Heung-Yong | - |
dc.date.accessioned | 2010-03-23 | - |
dc.date.available | 2010-03-23 | - |
dc.date.issued | 2005-10 | - |
dc.identifier.citation | Journal of The Electrochemical Society, 152, A2345-A2351 | en |
dc.identifier.issn | 0013-4651 | - |
dc.identifier.uri | https://hdl.handle.net/10371/61794 | - |
dc.description.abstract | Transient behavior of direct methanol fuel cells DMFCs during the preconditioning process has been investigated with a focus
on changes manifested in the anode by using an electrochemical impedance spectroscopic analysis. Preconditioning of membrane electrode assembly MEA is essential to achieve maximum cell performance, and the time required to accomplish the conditioning may vary depending on the methods that are adopted. Preconditioning temperature substantially influences the behaviors of MEAs, and room-temperature treatment has been found to be more favorable than high-temperature treatment at 90°C. Application of electric load during the preconditioning process accelerates the hydration of electrolyte and thus reduces the time required to reach a maximum performance limit. The anode impedance data of DMFC has been deconvoluted by using an equivalent circuit to investigate three kinds of resistances in the MEA, such as resistance of charge transfer Rct , electrolytes Re , and pore electrolytes Rp . The underpinning mechanism which causes the change in performance during the preconditioning process is discussed in terms of the changes in the resistance elements of the anode. | en |
dc.description.sponsorship | the Korean Ministry of
Commerce, Industry and Energy, through the Institute of Industrial Technology Evaluation and Planning ITEP under the research program Development of Advanced Technologies for Next Generation, and by the Korea Science and Engineering Foundation through the Research Center for Energy Conversion and Storage | en |
dc.language.iso | en | en |
dc.publisher | Electrochemical Society | en |
dc.subject | Transient behavior | en |
dc.subject | DMFC | en |
dc.subject | direct methanol | en |
dc.subject | fuel cell | en |
dc.subject | anode | en |
dc.subject | preconditioning process | en |
dc.title | Impedance Analysis on Transient Behavior of DMFC Anodes during Preconditioning Process | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 김준희 | - |
dc.contributor.AlternativeAuthor | 이호인 | - |
dc.contributor.AlternativeAuthor | 홍성안 | - |
dc.contributor.AlternativeAuthor | 하흥용 | - |
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