Increasing Power Density of LSGM-Based Solid Oxide Fuel Cells Using New Anode Materials

Author(s)

Kevin Huang, University of South Carolina - ColumbiaFollow
Jen-Hau Wan
John B. Goodenough

Document Type

Article

Abstract

Chemical reactions between the superior perovskite oxide-ion conductor Sr- and Mg-doped LaGaO₃ (LSGM), CeO₂, and NiO have been studied by powder X-ray diffraction. The results showed that an extensive reactivity occurs as a result of La migration driven by a gradient of La chemical activity. La migration across the LSGM/electrode interfaces in a fuel cell leads to the formation of resistive phases at the interface, either LaSrGa₃O₇ or LaSrGaO₄. Use of 40 mol % La₂O₃ -doped CeO₂ as an interlayer between anode and electrolyte as well as in the NiO-containing anode prevents all reactions found. Consequently, the air-H₂ cell maximum power density was increased to nearly 900 mW/cm² at 800°C with a 600 μm thick LSGM electrolyte. No sign of degradation was observed at 800°C over 2 weeks for an interlayered cell under a loading current density of 250 mA/cm².

Publication Info

Published in Journal of The Electrochemical Society, Volume 148, Issue 7, 2001, pages A788-A794.

Rights

©Journal of The Electrochemical Society 2001, The Electrochemical Society.

© The Electrochemical Society, Inc. 2001. 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 Journal of The Electrochemical Society.

Publisher’s Version: http://dx.doi.org/10.1149/1.1378289

Huang, K., Wan, J. H., & Goodenough, J. B. (2001). Increasing Power Density of LSGM-Based Solid Oxide Fuel Cells Using New Anode Materials. Journal of The Electrochemical Society, 148 (7), A788- A794. http://dx.doi.org/10.1149/1.1378289