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Open AccessArticle

LaxPr4−xNi3O10−δ: Mixed A-Site Cation Higher-Order Ruddlesden-Popper Phase Materials as Intermediate-Temperature Solid Oxide Fuel Cell Cathodes

1
Department of Materials, Faculty of Engineering, Imperial College London, Exhibition Road, London SW7 2AZ, UK
2
EPSRC Centre for Doctoral Training in Advanced Characterisation of Materials, Exhibition Road, London SW7 2AZ, UK
3
School of Materials Science and Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
*
Author to whom correspondence should be addressed.
Crystals 2020, 10(6), 428; https://doi.org/10.3390/cryst10060428
Received: 28 April 2020 / Revised: 14 May 2020 / Accepted: 22 May 2020 / Published: 27 May 2020
(This article belongs to the Special Issue Solid Oxide Fuel Cells and Electrolyzers)
Systematic studies of the air electrode and full solid oxide fuel cell performance of La3PrNi3O9.76, and La2Pr2Ni3O9.65 n = 3 Ruddlesden–Popper phases are reported. These phases were found to adopt orthorhombic symmetry with a decrease in lattice parameters on increasing Pr content, consistent with the solid solution series end members. From electrochemical impedance spectroscopy measurements of symmetrical cells, the electrodes were found to possess area specific resistances of 0.07 Ω cm2 for the La2Pr2Ni3O9.65 cathode and 0.10 Ω cm2 for the La3PrNi3O9.76 cathode at 750 °C, representing a significant improvement on previously reported compositions. This significant improvement in performance is attributed to the optimisation of the electrode microstructure, introduction of an electrolyte interlayer and the resulting improved adhesion of the electrode layer. Following this development, the new electrode materials were tested for their single-cell performance, with the maximum power densities obtained for La2Pr2Ni3O9.65 and La3PrNi3O9.76 being 390 mW cm−2 and 400 mW cm−2 at 800 °C, respectively. As these single-cell measurements were based on thick electrolytes, there is considerable scope to enhance over cell performance in future developments. View Full-Text
Keywords: solid oxide fuel cell; LaxPr4-xNi3O10-δ; power density; impedance spectroscopy; microstructure solid oxide fuel cell; LaxPr4-xNi3O10-δ; power density; impedance spectroscopy; microstructure
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MDPI and ACS Style

Yatoo, M.A.; Du, Z.; Yang, Z.; Zhao, H.; Skinner, S.J. LaxPr4−xNi3O10−δ: Mixed A-Site Cation Higher-Order Ruddlesden-Popper Phase Materials as Intermediate-Temperature Solid Oxide Fuel Cell Cathodes. Crystals 2020, 10, 428. https://doi.org/10.3390/cryst10060428

AMA Style

Yatoo MA, Du Z, Yang Z, Zhao H, Skinner SJ. LaxPr4−xNi3O10−δ: Mixed A-Site Cation Higher-Order Ruddlesden-Popper Phase Materials as Intermediate-Temperature Solid Oxide Fuel Cell Cathodes. Crystals. 2020; 10(6):428. https://doi.org/10.3390/cryst10060428

Chicago/Turabian Style

Yatoo, Mudasir A.; Du, Zhihong; Yang, Zhang; Zhao, Hailei; Skinner, Stephen J. 2020. "LaxPr4−xNi3O10−δ: Mixed A-Site Cation Higher-Order Ruddlesden-Popper Phase Materials as Intermediate-Temperature Solid Oxide Fuel Cell Cathodes" Crystals 10, no. 6: 428. https://doi.org/10.3390/cryst10060428

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