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Contact corrosion resistance between the cathode and current collector plate in the molten carbonate fuel cell
KTH, Superseded Departments, Chemical Engineering and Technology.ORCID iD: 0000-0002-2268-5042
KTH, Superseded Departments, Chemical Engineering and Technology.ORCID iD: 0000-0001-9203-9313
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2001 (English)In: Journal of the Electrochemical Society, ISSN 0013-4651, E-ISSN 1945-7111, Vol. 148, no 1, A38-A43 p.Article in journal (Refereed) Published
Abstract [en]

The corrosion layer Formed in the contact between the cathode and the current collector is one factor limiting the cathode performance in molten carbonate fuel cells (MCFC). In order to investigate the contribution to the total polarization of the contact resistance, electrochemical experiments were performed in a laboratory-scale fuel cell unit with a specially designed current collector. Two cathode materials, NiO and LiCoO2, were investigated to elucidate the impact of the cathode material on the formed corrosion layer. Polarization measurements as well as electrochemical impedance spectroscopy were used. The method works well for NiO electrodes. However, due to the poor electronic conductivity in the LiCoO2 electrode, the experimental results become difficult to evaluate due to a nonuniform potential distribution. The contact resistance between the cathode and the current collector contributes with a large value to the total cathode polarization. The corrosion layer in case of the LiCoO2 cathode was iron-rich and has a thickness of about 20 mum after 8 weeks operation of the fuel cell. Ln the case of the NiO cathode, a nickel-rich corrosion layer of about 15 mum was formed after 5 weeks operation of the fuel cell.

Place, publisher, year, edition, pages
2001. Vol. 148, no 1, A38-A43 p.
Keyword [en]
surface characterization methods, nickel-oxide, base alloys, performance, electrodes, behavior, polarization, alkali
Identifiers
URN: urn:nbn:se:kth:diva-20258ISI: 000166129600006OAI: oai:DiVA.org:kth-20258DiVA: diva2:338951
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Lagergren, CarinaLindbergh, Göran

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