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“Metal-air” batteries have garnered much attention in recent years due to their high intrinsic specific energy and use of inexhaustible and storage-free oxygen source -air- for the “metal-oxygen” reaction. In this study, we report theperformance of a new type of all solid-state “iron-air” battery operated at 550°C. The results show that CeO2 nanoparticles incorporated into the Fe-Fe3O4 redox-couple can improve the specific energy (Wh/kg) and round trip efficiency by 15% and 29%, respectively, over the baseline Fe-Fe3O4 battery. Use of supported Fe-Fe3O4 nanoparticles as the redox couple can increase the specific energy and round-trip efficiency by 13% and 48% over the baselinebattery, respectively. However, the nanoparticle redox-couple is susceptible to thermal coarsening under operating conditions, causing cycle stability problem. Future research needs to focus on improving battery's performance and stability by utilizing thin-film electrolyte and high-performance and stable electrodes, and preventing thermal growth of active redox couple nanoparticles. A most recent testing on an optimized battery component has shown promising results: discharge specific energy can reach 91.0% of the maximum theoretical specific energy with a round-trip efficiency of 82.5%.


©Journal of The Electrochemical Society (2013), The Electrochemical Society.

© The Electrochemical Society, Inc. 2013. All rights reserved. Except as provided under U.S. copyright law, this work may not be reproduced, resold, distributed, or modified without the express permission of The Electrochemical Society (ECS). The archival version of this work was published in the Journal of The Electrochemical Soceity.

Publisher’s Version: http://dx.doi.orgg/10.1149/2.085308jes

Zhao, X., Gong, Y., Li, X., Xu, N., & Huang, K. (2013). Performance of Solid Oxide Iron-Air Battery Operated at 550°C. Journal of The Electrochemical Soceity, 160 (8), A1241 - A1247.