Journal
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
Volume 38, Issue 7, Pages 2903-2908Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2018.02.022
Keywords
BaCeO3; BaZrO5; Proton conductor; One-step co-firing; Solid oxide fuel cells
Categories
Funding
- National Natural Science Foundation of China [51602238]
- Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP) [PPZY2015A025]
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A strategy of tailoring the ceramic cathode composite is presented to improve the performance of proton-conducting solid oxide fuel cells (SOFCs) prepared by a one-step co-firing process. Comparing to the conventional way of using BaCe0.7Zr0.1Y0.2O3-delta (BCZY) in the composite cathode for BCZY-electrolyte based cells, the replacement of BCZY by BaZr0.8Y0.2O3-delta (BZY) mitigates the reaction between the two ceramic phases in the composite cathode during the co-firing process and also keeps the cathode with sufficient porosity for ample gas diffusion which could assist in adequate cathode reactions. As a result, the BCZY-electrolyte based cell with Sm0.5Sr0.5CoO3-delta (SSC)-BZY composite cathode shows a power output of 300 mW cm(-2) at 600 degrees C, which is the largest ever reported for proton-conducting SOFCs prepared by a one-step co-firing process. The strategy of tailoring the composite cathode offers both small ohmic resistance and polarization resistance, providing a promising way to develop single-step co-fired proton-conducting SOFCs.
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