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A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C

The slow activity of cathode materials is one of the most significant barriers to realizing the operation of solid oxide fuel cells below 500 °C. Here we report a niobium and tantalum co-substituted perovskite SrCo(0.8)Nb(0.1)Ta(0.1)O(3−δ) as a cathode, which exhibits high electroactivity. This cath...

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Autores principales: Li, Mengran, Zhao, Mingwen, Li, Feng, Zhou, Wei, Peterson, Vanessa K., Xu, Xiaoyong, Shao, Zongping, Gentle, Ian, Zhu, Zhonghua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5216129/
https://www.ncbi.nlm.nih.gov/pubmed/28045088
http://dx.doi.org/10.1038/ncomms13990
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author Li, Mengran
Zhao, Mingwen
Li, Feng
Zhou, Wei
Peterson, Vanessa K.
Xu, Xiaoyong
Shao, Zongping
Gentle, Ian
Zhu, Zhonghua
author_facet Li, Mengran
Zhao, Mingwen
Li, Feng
Zhou, Wei
Peterson, Vanessa K.
Xu, Xiaoyong
Shao, Zongping
Gentle, Ian
Zhu, Zhonghua
author_sort Li, Mengran
collection PubMed
description The slow activity of cathode materials is one of the most significant barriers to realizing the operation of solid oxide fuel cells below 500 °C. Here we report a niobium and tantalum co-substituted perovskite SrCo(0.8)Nb(0.1)Ta(0.1)O(3−δ) as a cathode, which exhibits high electroactivity. This cathode has an area-specific polarization resistance as low as ∼0.16 and ∼0.68 Ω cm(2) in a symmetrical cell and peak power densities of 1.2 and 0.7 W cm(−2) in a Gd(0.1)Ce(0.9)O(1.95)-based anode-supported fuel cell at 500 and 450 °C, respectively. The high performance is attributed to an optimal balance of oxygen vacancies, ionic mobility and surface electron transfer as promoted by the synergistic effects of the niobium and tantalum. This work also points to an effective strategy in the design of cathodes for low-temperature solid oxide fuel cells.
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spelling pubmed-52161292017-01-06 A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C Li, Mengran Zhao, Mingwen Li, Feng Zhou, Wei Peterson, Vanessa K. Xu, Xiaoyong Shao, Zongping Gentle, Ian Zhu, Zhonghua Nat Commun Article The slow activity of cathode materials is one of the most significant barriers to realizing the operation of solid oxide fuel cells below 500 °C. Here we report a niobium and tantalum co-substituted perovskite SrCo(0.8)Nb(0.1)Ta(0.1)O(3−δ) as a cathode, which exhibits high electroactivity. This cathode has an area-specific polarization resistance as low as ∼0.16 and ∼0.68 Ω cm(2) in a symmetrical cell and peak power densities of 1.2 and 0.7 W cm(−2) in a Gd(0.1)Ce(0.9)O(1.95)-based anode-supported fuel cell at 500 and 450 °C, respectively. The high performance is attributed to an optimal balance of oxygen vacancies, ionic mobility and surface electron transfer as promoted by the synergistic effects of the niobium and tantalum. This work also points to an effective strategy in the design of cathodes for low-temperature solid oxide fuel cells. Nature Publishing Group 2017-01-03 /pmc/articles/PMC5216129/ /pubmed/28045088 http://dx.doi.org/10.1038/ncomms13990 Text en Copyright © 2017, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Li, Mengran
Zhao, Mingwen
Li, Feng
Zhou, Wei
Peterson, Vanessa K.
Xu, Xiaoyong
Shao, Zongping
Gentle, Ian
Zhu, Zhonghua
A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C
title A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C
title_full A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C
title_fullStr A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C
title_full_unstemmed A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C
title_short A niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °C
title_sort niobium and tantalum co-doped perovskite cathode for solid oxide fuel cells operating below 500 °c
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5216129/
https://www.ncbi.nlm.nih.gov/pubmed/28045088
http://dx.doi.org/10.1038/ncomms13990
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