TY - JOUR
T1 - Effect of lanthanum tungstate hole-blocking layer for improvement of energy efficiency in anode-supported protonic ceramic fuel cells
AU - Matsuo, Hiroki
AU - Nakane, Kenta
AU - Matsuzaki, Yoshio
AU - Otomo, Junichiro
N1 - Funding Information:
Acknowledgements This work was supported by JSPS KAKENHI Grant Number JP17H00801 of Japan Society for the Promotion of Science (JSPS), JST COI Grant Number JPMJCE1318 of Japan Science and Technology Agency (JST). XRD and SEM measurements were performed using the facilities of the Institute of Solid State Physics, the University of Tokyo.
Publisher Copyright:
© 2021 The Ceramic Society of Japan. All rights reserved.
PY - 2021/3
Y1 - 2021/3
N2 - Conduction of minority carriers in electrolytes is one of the key factors to be controlled to realize highly efficient protonic ceramic fuel cells (PCFCs). In this study, the performance of anode-supported PCFCs using a BaZr0.8Y0.2O31¤ (BZY) monolayer electrolyte membrane and a bilayer electrolyte where a lanthanum tungstate (La281xW4+xO54+3/2x; LWO) hole-blocking layer is deposited on the BZY membrane are investigated by theoretical calculations based on transport properties of the electrolytes and experimental electrochemical performance tests. The theoretical calculations indicated that the BZY«LWO bilayer cell can achieve higher open-circuit voltage (OCV) and energy efficiency than those of the BZY monolayer cell by suppressing the hole conduction in the electrolyte membrane. We experimentally confirmed that the BZY«LWO cell exhibited the OCV of 1.01 V while that of the BZY monolayer cell was 0.93 V at 600 °C. This study presents that the thin LWO hole-blocking layer is effective in the improvement of the OCV and the energy efficiency of the anode-supported PCFCs.
AB - Conduction of minority carriers in electrolytes is one of the key factors to be controlled to realize highly efficient protonic ceramic fuel cells (PCFCs). In this study, the performance of anode-supported PCFCs using a BaZr0.8Y0.2O31¤ (BZY) monolayer electrolyte membrane and a bilayer electrolyte where a lanthanum tungstate (La281xW4+xO54+3/2x; LWO) hole-blocking layer is deposited on the BZY membrane are investigated by theoretical calculations based on transport properties of the electrolytes and experimental electrochemical performance tests. The theoretical calculations indicated that the BZY«LWO bilayer cell can achieve higher open-circuit voltage (OCV) and energy efficiency than those of the BZY monolayer cell by suppressing the hole conduction in the electrolyte membrane. We experimentally confirmed that the BZY«LWO cell exhibited the OCV of 1.01 V while that of the BZY monolayer cell was 0.93 V at 600 °C. This study presents that the thin LWO hole-blocking layer is effective in the improvement of the OCV and the energy efficiency of the anode-supported PCFCs.
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U2 - 10.2109/jcersj2.20204
DO - 10.2109/jcersj2.20204
M3 - Article
AN - SCOPUS:85101737319
SN - 1882-0743
VL - 129
SP - 147
EP - 153
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
IS - 3
ER -
