|
authors |
Araujo, AJM; Loureiro, FJA; Holz, LIV; Grilo, JPF; Macedo, DA; Paskocimas, CA; Fagg, DP |
|
nationality |
International |
|
journal |
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY |
|
author keywords |
SOFC/SOEC; LSCF; Calcium cobaltite; Microstructure; Electrochemical properties; Gerischer |
|
keywords |
MISFIT-LAYERED COBALTITE; ELECTROCHEMICAL PERFORMANCE; THERMAL-EXPANSION; RELAXATION-TIMES; LA0.6SR0.4CO0.2FE0.8O3-DELTA CATHODES; HYDROTHERMAL SYNTHESIS; TRANSPORT-PROPERTIES; MODULATED STRUCTURE; MIXED CONDUCTIVITY; REDUCTION REACTION |
|
abstract |
Calcium cobaltites have emerged as an attractive alternative to be used in Solid Oxide Cells (SOCs), due to their excellent thermal compatibility with standard electrolytes that may privilege these compounds among state-of-the-art SOC electrodes. Nonetheless, their electrochemical performances have been strongly limited by poor oxygen ion transport. Hence, we report a new composite electrode containing the misfit calcium cobaltite [Ca2CoO3-delta](0.62)[CoO2] (C349) phase combined with Ce0.8Pr0.2O2-delta (CPO). A comparative study is presented between this composite and the standard La0.6Sr0.4Co0.2Fe0.8O3-delta (LSCF), in terms of their microstructures, number of depositions, and resultant electrochemical properties. Such tailoring permits the best C349/CPO composite electrode to attain high levels of electrochemical performance that rival with the standard LSCF material. This successful result is highly relevant, as it can provide insight into the most critical optimisation factors for similar SOC electrodes that intrinsically suffer from similarly low levels of ionic transport. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. |
|
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
|
issn |
0360-3199 |
|
isbn |
1879-3487 |
|
year published |
2021 |
|
volume |
46 |
|
issue |
55 |
|
beginning page |
28258 |
|
ending page |
28269 |
|
digital object identifier (doi) |
10.1016/j.ijhydene.2021.06.049 |
|
web of science category |
12 |
|
subject category |
Chemistry, Physical; Electrochemistry; Energy & Fuels |
|
unique article identifier |
WOS:000679247700007
|
