Issue 19, 2019
From the journal:

Journal of Materials Chemistry A

Nickel-substituted Ba0.5Sr0.5Co0.8Fe0.2O3−δ: a highly active perovskite oxygen electrode for reduced-temperature solid oxide fuel cells†

Lu Li,a   Hua Yang,a   Zhenghui Gao,a   Yaping Zhang,b   Feifei Dong, ORCID logo *a   Guangming Yang, ORCID logo d   Meng Nic  and  Zhan Lin ORCID logo *a  

* Corresponding authors

a School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou Higher Education Mega Center, Guangzhou 510006, China
E-mail: dongff@gdut.edu.cn, zhanlin@gdut.edu.cn
Tel: +86 20 39320229

b State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang 621010, China

c Building Energy Research Group, Department of Building and Real Estate, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, China

d State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing 211816, China

Abstract

A key need for the advancement of high-performance solid oxide fuel cells (SOFCs) is to develop viable cathode materials with high electrocatalytic activity for the oxygen reduction reaction (ORR) at reduced operating temperatures below 700 °C. Here, we report a Ni-substituted perovskite composition Ba0.5Sr0.5Co0.7Fe0.2Ni0.1O3−δ (BSCFN) as a potential cathode material focusing on enhancing the electrochemical performance. Considerable attention is paid to the research of physicochemical properties primarily by crystal structure and oxygen transport measurements, with the aim to build up the correlation with the ORR activity. With the BSCFN cathode, a symmetrical cell achieves a very low area-specific polarization resistance of only ∼0.018 Ω cm2 and a single cell delivers a maximum power density as high as ∼1.8 W cm−2 at 650 °C. Such a large electrode performance improvement is attributed to the sustained cubic-symmetry perovskite structure and fast oxygen kinetics promoted by Ni substitution. The desirable ORR activity and durability highlight the potential of BSCFN as a highly promising oxygen electrode for reduced-temperature SOFCs.

Graphical abstract: Nickel-substituted Ba0.5Sr0.5Co0.8Fe0.2O3−δ: a highly active perovskite oxygen electrode for reduced-temperature solid oxide fuel cells

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Article information

DOI
https://doi.org/10.1039/C9TA02548K
Article type
Paper
Submitted
08 Mar 2019
Accepted
23 Apr 2019
First published
24 Apr 2019

J. Mater. Chem. A, 2019,7, 12343-12349

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Nickel-substituted Ba0.5Sr0.5Co0.8Fe0.2O3−δ: a highly active perovskite oxygen electrode for reduced-temperature solid oxide fuel cells

L. Li, H. Yang, Z. Gao, Y. Zhang, F. Dong, G. Yang, M. Ni and Z. Lin, J. Mater. Chem. A, 2019, 7, 12343 DOI: 10.1039/C9TA02548K

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