Enhanced Long-Term Cathode Stability by Tuning Interfacial Nanocomposite for Intermediate Temperature Solid Oxide Fuel Cells

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Hu, Dingyue, Dawson, Karl ORCID: 0000-0003-3249-8328, Zanella, Marco ORCID: 0000-0002-6164-6169, Manning, Troy D ORCID: 0000-0002-7624-4306, Daniels, Luke M ORCID: 0000-0002-7077-6125, Browning, Nigel D ORCID: 0000-0003-0491-251X, Mehdi, B Layla ORCID: 0000-0002-8281-9524, Xu, Yaobin, Amari, Houari, Shin, J Felix et al (show 8 more authors) , Pitcher, Michael J, Chen, Ruiyong ORCID: 0000-0002-5340-248X, Niu, Hongjun, Liu, Bowen, Bilton, Matthew ORCID: 0000-0002-0475-2942, Kim, Junyoung, Claridge, John B ORCID: 0000-0003-4849-6714 and Rosseinsky, Matthew J ORCID: 0000-0002-1910-2483 (2022) Enhanced Long-Term Cathode Stability by Tuning Interfacial Nanocomposite for Intermediate Temperature Solid Oxide Fuel Cells ADVANCED MATERIALS INTERFACES, 9 (14). p. 2102131. ISSN 2196-7350, 2196-7350

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Abstract

Performance durability is one of the essential requirements for solid oxide fuel cell materials operating in the intermediate temperature range (500–700 °C). The trade-off between desirable catalytic activity and long-term stability challenges the development and commercialization of electrode materials. Here an oxygen cathode material, Ba<inf>0.5</inf>Sr<inf>0.5</inf>(Co<inf>0.7</inf>Fe<inf>0.3</inf>)<inf>0.69−</inf><inf>x</inf>Mg<inf>x</inf>W<inf>0.31</inf>O<inf>3−</inf><inf>δ</inf> (BSCFW-xMg), that exhibits excellent electrocatalytic performance through the addition of an optimized amount of Mg to the self-assembled nanocomposite Ba<inf>0.5</inf>Sr<inf>0.5</inf>(Co<inf>0.7</inf>Fe<inf>0.3</inf>)<inf>0.69</inf>W<inf>0.31</inf>O<inf>3−</inf><inf>δ</inf> (BSCFW) by simple solid-state reaction is reported. Distinct from the bulk and surface approaches to introduce vacancies and defects in materials design, here the Mg²⁺ ions concentrate at the single perovskite/double perovskite interface of BSCFW with dislocations and Mg²⁺-rich nanolayers, resulting in stressed and compositionally inhomogeneous interface regions. The interfacial chemistry within these nanocomposites provides an additional degree of freedom to enable performance optimization over single phase materials and promotes the durability of alkaline-earth based fuel cell materials.

Item Type:	Article
Uncontrolled Keywords:	cathodes, long-term stability of cathode materials, perovskite, self-assembly, solid oxide fuel cells
Divisions:	Faculty of Science & Engineering > School of Engineering Faculty of Science & Engineering > School of Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	06 Apr 2022 12:59
Last Modified:	16 Jun 2026 09:46
DOI:	10.1002/admi.202102131
Open Access URL:	https://doi.org/10.1002/admi.202102131
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3152278
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