Attempted preparation of La0.5Ba0.5MnO3−δ leading to an in-situ formation of manganate nanocomposites as a cathode for proton-conducting solid oxide fuel cells

Rui Zhou; Yanru Yin; Hailu Dai; Xuan Yang; Yueyuan Gu; Lei Bi

doi:10.26599/JAC.2023.9220748

Journal of Advanced Ceramics 2023, 12(6): 1189-1200 https://doi.org/10.26599/JAC.2023.9220748

Research Article |

Open Access | Issue | Published: 19 May 2023

Attempted preparation of La_0.5Ba_0.5MnO_3−δ leading to an in-situ formation of manganate nanocomposites as a cathode for proton-conducting solid oxide fuel cells

Show Author's Information Hide Author's Information Rui Zhou^{^a^,^†}, Yanru Yin^{^a^,^†}, Hailu Dai^{^b}, Xuan Yang^{^a}, Yueyuan Gu^{^a}(

), Lei Bi^{^a}(

)

aSchool of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China

bSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China

† Rui Zhou and Yanru Yin contributed equally to this work.

Keywords:

nanocomposites, cathode, solid oxide fuel cells (SOFCs), proton conductor, La_0.5Ba_0.5MnO_3−δ

Cite this article:

Zhou R, Yin Y, Dai H, et al. Attempted preparation of La_0.5Ba_0.5MnO_3−δ leading to an in-situ formation of manganate nanocomposites as a cathode for proton-conducting solid oxide fuel cells. Journal of Advanced Ceramics, 2023, 12(6): 1189-1200. https://doi.org/10.26599/JAC.2023.9220748

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Abstract Full text About this article

Abstract

A La_0.5Ba_0.5MnO_3−δ oxide was prepared using the sol–gel technique. Instead of a pure phase, La_0.5Ba_0.5MnO_3−δ was discovered to be a combination of La_0.7Ba_0.3MnO_3−δ and BaMnO₃. The in-situ production of La_0.7Ba_0.3MnO_3−δ+BaMnO₃ nanocomposites enhanced the oxygen vacancy (V_O) formation compared to single-phase La_0.7Ba_0.3MnO_3−δ or BaMnO₃, providing potential benefits as a cathode for fuel cells. Subsequently, La_0.7Ba_0.3MnO_3−δ+BaMnO₃ nanocomposites were utilized as the cathode for proton-conducting solid oxide fuel cells (H-SOFCs), which significantly improved cell performance. At 700 ℃, H-SOFC with a La_0.7Ba_0.3MnO_3−δ+BaMnO₃ nanocomposite cathode achieved the highest power density (1504 mW·cm⁻²) yet recorded for H-SOFCs with manganate cathodes. This performance was much greater than that of single-phase La_0.7Ba_0.3MnO_3−δ or BaMnO₃ cathode cells. In addition, the cell demonstrated excellent working stability. First-principles calculations indicated that the La_0.7Ba_0.3MnO_3−δ/BaMnO₃ interface was crucial for the enhanced cathode performance. The oxygen reduction reaction (ORR) free energy barrier was significantly lower at the La_0.7Ba_0.3MnO_3−δ/BaMnO₃ interface than that at the La_0.7Ba_0.3MnO_3−δ or BaMnO₃ surfaces, which explained the origin of high performance and gave a guide for the construction of novel cathodes for H-SOFCs.

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Attempted preparation of La_0.5Ba_0.5MnO_3−δ leading to an in-situ formation of manganate nanocomposites as a cathode for proton-conducting solid oxide fuel cells

Show Author's information Hide Author's Information Rui Zhou^{^a^,^†}, Yanru Yin^{^a^,^†}, Hailu Dai^{^b}, Xuan Yang^{^a}, Yueyuan Gu^{^a}(

), Lei Bi^{^a}(

)

aSchool of Resources Environment and Safety Engineering, University of South China, Hengyang 421001, China

bSchool of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng 224051, China

† Rui Zhou and Yanru Yin contributed equally to this work.

Abstract

Keywords: nanocomposites, cathode, solid oxide fuel cells (SOFCs), proton conductor, La_0.5Ba_0.5MnO_3−δ

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Acknowledgements

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Publication history

Received: 28 January 2023

Revised: 08 March 2023

Accepted: 26 March 2023

Published: 19 May 2023

Issue date: June 2023

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 52272216 and 51972183), the Hundred Youth Talents Program of Hunan, and the Startup Funding for Talents at University of South China. Rui Zhou and Xuan Yang appreciate the support from the Hunan University Student Innovation and Entrepreneurship Training Program (Grant No. S202210555343)

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