Corrosion-resistant coating for cathode current collector and wet-seal area of molten carbonate fuel cells

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High-temperature corrosion of metallic bipolar plates is a main problem to limit system reliability of molten carbonate fuel cells (MCFCs). In particular, cathode current collector (CCC) and wet-seal area in the bipolar plates suffer severe corrosion during MCFCs operation. Herein, we are trying to explore facile and cost-effective coating materials and methods to enhance corrosion resistance of CCC and wet-seal area of MCFCs. Cobalt (Co) layer was coated by using electrodeposition method for CCC, and aluminum (Al) layer was coated by using mechanical cladding method for wet-seal area. Co and Al layers were transformed into in-situ lithiated oxides, which are LiCoO2 and LiAlO2, by reacting with electrolytes without detachment. These in-situ formed oxides efficiently impede formation and growth of corrosion scales by preventing permeation of electrolytes. We believe that Co electrodeposition and Al cladding would be suitable and practical methods for making protective layers to enhance corrosion resistance of CCC and wet-seal area in the MCFCs bipolar plates. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Issue Date
2018-06
Language
English
Article Type
Article; Proceedings Paper
Keywords

HIGH-ALLOY STEELS; SEPARATOR PLATES; STAINLESS-STEEL; ALKALI CARBONATES; HOT-CORROSION; BASE ALLOYS; BEHAVIOR; IRON

Citation

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.43, no.24, pp.11363 - 11371

ISSN
0360-3199
DOI
10.1016/j.ijhydene.2018.02.196
URI
http://hdl.handle.net/10203/244691
Appears in Collection
MS-Journal Papers(저널논문)
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