Silver coated cathode for molten carbonate fuel cells
authors Lysik, A; Wejrzanowski, T; Cwieka, K; Skibinski, J; Milewski, J; Marques, FMB; Norby, T; Xing, W
nationality International
journal INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
author keywords Molten carbonate fuel cells; Cathode; Chemical modification; Silver
keywords TRIPLE PHASE-BOUNDARY; OPEN-POROUS MATERIALS; OXYGEN REDUCTION; NIO CATHODE; ELECTROCHEMICAL PERFORMANCE; COMPOSITE CATHODES; SURFACE-AREA; PORE-SIZE; MCFC; ELECTRODE
abstract Within this study, a layered cathode for use in a Molten Carbonate Fuel Cell (MCFC) has been developed. The substrate layer and reference MCFC cathode made of porous nickel was covered by a porous silver film with defined porosity and pore size. Both layers were fabricated using the tape casting method and further fired in a reductive atmosphere. The new cathode was assembled with other reference cell components to form a single MCFC, which was subjected to performance and durability tests. Scanning electron microscopy was used to analyze the microstructure of the materials before and after tests. The reference cathode was also studied for the comparison. The results show that the porous silver layer was able to enhance the electron transport between the cathode and current collector. It was also found that oxygen reduction is enhanced due to the presence of silver in the gas supply. As a result, the power density of the cell was increased by 50%. On the other hand, due to the separation from electrolyte by the NiO layer, no significant degradation of the silver layer, identified by SEM or electrochemical tests, was found after 1000 h. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
publisher PERGAMON-ELSEVIER SCIENCE LTD
issn 0360-3199
year published 2020
volume 45
issue 38
beginning page 19847
ending page 19857
digital object identifier (doi) 10.1016/j.ijhydene.2020.05.112
web of science category Chemistry, Physical; Electrochemistry; Energy & Fuels
subject category Chemistry; Electrochemistry; Energy & Fuels
unique article identifier WOS:000552053500093
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