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Materials characterization of thin film electrodes for PEFC - Survey of methods and an example
KTH, Superseded Departments, Chemical Engineering and Technology.
2004 (English)In: Journal of New Materials for Electrochemical Systems, ISSN 1480-2422, Vol. 7, no 1, 21-28 p.Article in journal (Refereed) Published
Abstract [en]

Thorough materials characterization is an essential tool for obtaining a deeper understanding of the electrochemical processes taking place in thin film electrodes of polymer fuel cells. This paper gives a survey of different methods for characterizing materials properties that are relevant to the electrochemical performance of such electrodes (i.e. loading, thickness, electrical conductivity, porosity, pore size distribution and pore morphology). The use of these materials characterization methods is exemplified, among other things it is shown that the ionomer (Nafion(R)) in a thin-film electrode made by the spraying method is homogeneously distributed in pores smaller than 40 nm. Furthermore, the ionomer penetrates and/or encapsulates the primary carbon particles of 30 nm. The results are discussed in relation to different MEA fabrication methods.

Place, publisher, year, edition, pages
2004. Vol. 7, no 1, 21-28 p.
Keyword [en]
PEMFC, porosimetry, electron microscopy, SEM, TEM, membrane fuel-cell, gas-diffusion electrodes, pt loading electrodes, catalyst layer, performance, carbon, cathode, microstructure
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-23301ISI: 000220641500004Scopus ID: 2-s2.0-2342501758OAI: oai:DiVA.org:kth-23301DiVA: diva2:341999
Note
QC 20100525 QC 20111031Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2011-10-31Bibliographically approved

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