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Research Article | Open Access

Rational design of PrBaFe2O6−δ-based cathodes for protonic ceramic fuel cells

Yanru Yin1Shiqi Zhang2Ao Wang2Dong Yan1Jian Li1Lichao Jia1( )
School of Materials Science and Engineering, State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China
Wuhan Institute of Marine Electric Propulsion, Wuhan 430064, China
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Abstract

Obtaining high-performance cathodes is critical for protonic ceramic fuel cells (PCFCs), as cathode performance significantly impacts fuel cell performance. A full understanding of the interactions among the diverse properties of cathode materials would benefit cathode design. In this study, PrBaFe2O6−δ (PBF) was doped with various dopants, including cobalt (Co), Ni, Cu, Zn, and Mn. Experiments and first-principles calculations are used to study the key properties of dopant-modified PrBaFe2O6−δ, including oxygen vacancy (VO) creation, hydration ability, proton mobility, and oxygen reduction reaction (ORR) activity. There is no perfect dopant that can improve every property to its full potential. Instead, different dopants can impact different properties of the material. Co-dopant has the best cathode performance since it balances the material’s instinctive properties, even though it does not provide a significant advantage in the formation of VO. PCFC utilizing Co-doped PrBaFe2O6−δ cathode has a high performance of 1680 mW·cm−2 at 700 °C, which is greater than that of the other dopant-tailored PrBaFe2O6−δ cathodes reported in this study and is one of the largest ever recorded for PrBaFe2O6−δ-based cathodes for PCFCs. Co-doped PrBaFe2O6−δ cathode is further demonstrated to be robust, with excellent operational stability. This study not only provides a potential cathode candidate for PCFCs but also suggests an intriguing approach to cathode design by carefully examining and balancing different vital properties of the material.

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Journal of Advanced Ceramics
Pages 1600-1610
Cite this article:
Yin Y, Zhang S, Wang A, et al. Rational design of PrBaFe2O6−δ-based cathodes for protonic ceramic fuel cells. Journal of Advanced Ceramics, 2024, 13(10): 1600-1610. https://doi.org/10.26599/JAC.2024.9220960

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Received: 24 June 2024
Revised: 08 August 2024
Accepted: 19 August 2024
Published: 22 October 2024
© The Author(s) 2024.

This is an open access article under the terms of the Creative Commons Attribution 4.0 International License (CC BY 4.0, http://creativecommons.org/licenses/by/4.0/).

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