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Impedance Analysis on Transient Behavior of DMFC Anodes during Preconditioning Process

DC Field Value Language
dc.contributor.authorKim, Joon-Hee-
dc.contributor.authorLee, Ho-In-
dc.contributor.authorHong, Seong-Ahn-
dc.contributor.authorHa, Heung-Yong-
dc.date.accessioned2010-03-23-
dc.date.available2010-03-23-
dc.date.issued2005-10-
dc.identifier.citationJournal of The Electrochemical Society, 152, A2345-A2351en
dc.identifier.issn0013-4651-
dc.identifier.urihttps://hdl.handle.net/10371/61794-
dc.description.abstractTransient 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.sponsorshipthe 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.isoenen
dc.publisherElectrochemical Societyen
dc.subjectTransient behavioren
dc.subjectDMFCen
dc.subjectdirect methanolen
dc.subjectfuel cellen
dc.subjectanodeen
dc.subjectpreconditioning processen
dc.titleImpedance Analysis on Transient Behavior of DMFC Anodes during Preconditioning Processen
dc.typeArticleen
dc.contributor.AlternativeAuthor김준희-
dc.contributor.AlternativeAuthor이호인-
dc.contributor.AlternativeAuthor홍성안-
dc.contributor.AlternativeAuthor하흥용-
Appears in Collections:
College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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