journal article·2025-01

Revisiting Mo‐Doped SrFeO3‐δ Perovskite: The Origination of Cathodic Activity and Longevity for Intermediate‐Temperature Solid Oxide Fuel Cells

Yihang Li, Naveed Mushtaq, Yongjian Chen, Weimin Ye, Zechao Zhuang, Manish Singh, Yifu Jing, Liangdong Fan

Advanced Functional Materials· Volume 35· Issue 3
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Abstract

Abstract The development of cathode materials for rapid and durable oxygen reduction reaction (ORR) is of great importance for intermediate‐temperature solid oxide fuel cells (IT‐SOFCs). Here, we reported a rationally designed minor acidic MoO3 incorporated SrFeO3‐δ‐based perovskite oxide, SrFe0.93Mo0.07O3‐δ instead of normally heavily doped one, with stable cubic phase, exceptional ORR activity, strong Sr segregation resistance and CO2 tolerance as a reliable cathode for IT‐SOFCs through a combined strategy of smith acidity and average metal‐oxygen bond energy regulations. Theoretical investigation on the origin of nonstoichiometric and associated electronic structure properties shows that significant hybridization of the Fe‐3d and O‐2p state, reduced oxygen vacancies formation energy and eased bulk oxide ion diffusivity through controllable amount of Mo‐doping contribute to remarkable ORR activity. The single cell with SrFe0.93Mo0.07O3‐δ cathode exhibits a peak power density of 0.24–1.12 W cm−2 at 600–800 °C, and excellent stability for 270 h at 700 °C. Furthermore, the single cell demonstrates excellent thermal cycling robustness and well‐integrated interfaces without any performance degradation after undergoing 20 rapid temperature fluctuations throughout 500 h. Therefore, this work embodies a combined strategy for designing active perovskite cathode and highlights the great potential for IT‐SOFCs as validated by multiple perspective considerations.
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Research context

OpenAlex topics: Advancements in Solid Oxide Fuel Cells · Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Shenzhen Key Laboratory of New Lithium‐ion Batteries and Mesoporous Materials, Department of New Energy Science and Technology College of Chemistry and Environmental Engineering Shenzhen University Shenzhen 518060 China

Interdisciplinary Research Center of Smart Sensors Academy of Advanced Interdisciplinary Research Xidian University Xi'an 710126 China

Key Laboratory of Artificial Olfaction of Shaanxi Higher Education Institutes Shaanxi Key Laboratory of High‐Orbits‐Electron Materials and Protection Technology for Aerospace School of Advanced Materials and Nanotechnology Xidian University Shaanxi 710126 China

State Key Laboratory of Electromechanical Integrated Manufacturing of High‐performance Electronic Equipments Xidian University Xi'an 710126 China

School of Physics, Electronics and Intelligent Manufacturing Huaihua University Huaihua 418000 China

School of Energy and Environment Southeast University No. 2SI Pai Lou Nanjing 210096 China

Department of Chemical Engineering Columbia University New York NY 10027 USA

Department of Metallurgical and Materials Engineering Indian Institute of Technology Patna Bihta Bihar 801106 India

Department of Materials Science Shenzhen MSU‐BIT University Shenzhen 517182 China

Funding

Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Basic and Applied Basic Research Foundation of Guangdong Province

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