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Effect of enhanced reaction area in double layered Ba0.5Sr0.5Co0.8Fe0.2O3-delta cathode for intermediate temperature solid oxide fuel cells

Title
Effect of enhanced reaction area in double layered Ba0.5Sr0.5Co0.8Fe0.2O3-delta cathode for intermediate temperature solid oxide fuel cells
Author
신동욱
Keywords
IT-SOFCs; Double layered BSCF; Impedance spectroscopy; Cyclic voltammetry
Issue Date
2012-02
Publisher
ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Citation
SOLID STATE IONICS; MAY 28 2012, 216 p54-p57, 4p.
Abstract
To optimize the microstructure of cathode for IT-SOFCs, double layered Ba0.5Sr0.5Co0.8Fe0.2O3-delta was fabricated and its performances were evaluated. Two types of symmetric cell with BSCF cathodes were prepared on Ce(0.8)G(0.2)O(1.9) electrolyte pellets using a single continuous process, electrostatic slurry spray deposition. Single layered BSCF cathode was fabricated with a porous layer only, while double layered one was fabricated with a porous layer over a thin dense layer. The polarization resistances at 500 degrees C and the activation energy of double layered BSCF were about 61% and 22% lower than single layered BSCF, respectively. The exchange current density of double layered BSCF was also higher than that of single layered BSCF, suggesting that the larger active area of double layered BSCF cathode is effective in the increase of oxygen reduction reaction rates. (C) 2012 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0167273812000458
ISSN
0167-2738
DOI
10.1016/j.ssi.2012.01.032
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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