Performance evolution of niobium doped lanthanum strontium ferrate perovskite anode for solid oxide fuel cells

Li, J.; Lü, Z.; Irvine, J. T.S.

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Date

08/09/2019

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Abstract

In this paper, evolutions of La0.8Sr0.2Fe0.9Nb0.1O3-δ (LSFNb) anodes for solid oxide fuel cells (SOFCs) with different microstructures are investigated, which are prepared by adjusting the weight ratio of electrode powder/organic binder during the preparation of slurries. AC impedance spectra clearly reveals that LSFNb anode made from 7:4-slurry shows better microstructure and lower polarization resistance (RP) compared with those of LSFNb anode made from 7:2.5-slurry. Better electrochemical performance is obtained on the single cells using 7:4-anode and cathode slurries with maximum power density (MPD) reaching 331.9 mW·cm-2 after discharged for 200 h fueled by H2, compared with 285.8 mW·cm-2 of the cell made from 7:2.5-slurries. The two cells exhibit excellent stability with undetectable degenerations for over 200 h. These results demonstrate that LSFNb made from thin slurries possesses better electrochemical performance and can active continuously without significant agglomeration, making porous LSFNb a promising perovskite anode candidate for SOFCs.

Citation

Li , J , Lü , Z & Irvine , J T S 2019 , Performance evolution of niobium doped lanthanum strontium ferrate perovskite anode for solid oxide fuel cells . in K Eguchi & S C Singhal (eds) , Solid Oxide Fuel Cells 16, SOFC XVI . ECS Transactions , no. 1 , vol. 91 , Electrochemical Society, Inc. , pp. 1693-1700 , 16th International Symposium on Solid Oxide Fuel Cells, SOFC XVI , Kyoto , Japan , 8/09/19 . https://doi.org/10.1149/09101.1693ecst

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Publication

Solid Oxide Fuel Cells 16, SOFC XVI

DOI

https://doi.org/10.1149/09101.1693ecst

ISSN

1938-6737

Type

Conference item

Rights

© 2019 ECS - The Electrochemical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1149/09101.1693ecst

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University of St Andrews Research

URI

http://hdl.handle.net/10023/18804