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Research Article

In3+-doped Sr2Fe1.5Mo0.5O6−δ cathode with improved performance for an intermediate-temperature solid oxide fuel cell

Yumei Ma1,§, Lijie Zhang2,§, Kang Zhu2, Binze Zhang2, Ranran Peng2, Changrong Xia2( ), Ling Huang1( )
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830046, China
Department of Materials Science and Engineering, University of Science and Technology of China, Hefei 230026, China

§ Yumei Ma and Lijie Zhang contributed equally to this work.

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Graphical Abstract

In3+ doping effectively reduces the oxygen vacancy formation energy, generates more oxygen vacancies, and improves the oxygen transport performance. The maximum power density of SFMIn0.1 cells reaches 0.92 and 1.47 W∙cm−2 at 750 and 800 °C, respectively.

Abstract

Promoting the oxygen reduction reaction (ORR) is critical for commercialization of intermediate-temperature solid oxide fuel cells (IT-SOFCs), where Sr2Fe1.5Mo0.5O6−δ (SFM) is a promising cathode by working as a mixed ionic and electronic conductor. In this work, doping of In3+ greatly increases the oxygen vacancy concentration and the content of adsorbed oxygen species in Sr2Fe1.5Mo0.5−xInxO6−δ (SFMInx), and thus effectively promotes the ORR performance. As a typical example, SFMIn0.1 reduces the polarization resistance (Rp) from 0.089 to 0.046 Ω∙cm2 at 800 °C, which is superior to those doped with other metal elements. In addition, SFMIn0.1 increases the peak power density from 0.92 to 1.47 W∙cm−2 at 800 °C with humidified H2 as the fuel, indicating that In3+ doping at the Mo site can effectively improve the performance of SOFC cathode material.

Keywords

solid oxide fuel cellcathodeIn3+ dopingoxygen reduction reaction (ORR)Sr2Fe1.5Mo0.5O6−δ

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Nano Research
Volume 17 Issue 1,
January 2024
Pages 407-415
DOI: 10.1007/s12274-023-6338-y
Cite this article:
Ma Y, Zhang L, Zhu K, et al. In3+-doped Sr2Fe1.5Mo0.5O6−δ cathode with improved performance for an intermediate-temperature solid oxide fuel cell. Nano Research, 2024, 17(1): 407-415. https://doi.org/10.1007/s12274-023-6338-y
Topics:
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Received: 04 September 2023
Revised: 07 November 2023
Accepted: 07 November 2023
Published: 29 December 2023
© Tsinghua University Press 2023
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