Promoted Performance of Layered Perovskite PrBaFe2O5+δ Cathode for Protonic Ceramic Fuel Cells by Zn Doping

Birkneh Sirak Teketel; Bayu Admasu Beshiwork; Dong Tian; Shiyue Zhu; Halefom G. Desta; Khan Kashif; Yonghong Chen; Bin Lin

doi:10.3390/catal12050488

Catalysts (Apr 2022)

Promoted Performance of Layered Perovskite PrBaFe2O5+δ Cathode for Protonic Ceramic Fuel Cells by Zn Doping

Birkneh Sirak Teketel,
Bayu Admasu Beshiwork,
Dong Tian,
Shiyue Zhu,
Halefom G. Desta,
Khan Kashif,
Yonghong Chen,
Bin Lin

Affiliations

Birkneh Sirak Teketel: School of Mechanical and Electrical Engineering, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Bayu Admasu Beshiwork: School of Mechanical and Electrical Engineering, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Dong Tian: Anhui Key Laboratory of Low-Temperature Co-Fired Material, Huainan Engineering Research Center for Fuel Cells, Huainan Normal University, Huainan 232001, China
Shiyue Zhu: Anhui Key Laboratory of Low-Temperature Co-Fired Material, Huainan Engineering Research Center for Fuel Cells, Huainan Normal University, Huainan 232001, China
Halefom G. Desta: School of Mechanical and Electrical Engineering, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Khan Kashif: School of Mechanical and Electrical Engineering, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China
Yonghong Chen: Anhui Key Laboratory of Low-Temperature Co-Fired Material, Huainan Engineering Research Center for Fuel Cells, Huainan Normal University, Huainan 232001, China
Bin Lin: School of Mechanical and Electrical Engineering, School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China

DOI: https://doi.org/10.3390/catal12050488
Journal volume & issue: Vol. 12, no. 5
p. 488

Abstract

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Proton-conducting solid–oxide fuel cell (H-SOFC) is an alternative promising low-temperature electrochemical cell for renewable energy, but the performance is insufficient because of the low activity of cathode materials at low temperatures. A layered perovskite oxide PrBaFe1.9Zn0.1O5+δ (PBFZ) was synthesized and investigated as a promising cathode material for low-temperature H-SOFC. Here, the partial substitution of Fe by Zn further enhances the electrical conductivity and thermal compatibility of PrBaFe2O5+δ (PBF). The PBFZ exhibits improved conductivity in the air at intermediate temperatures and good chemical compatibility with electrolytes. The oxygen vacancy formed at the PBFZ lattice due to Zn doping enhances proton defects, resulting in an improved performance by extending the catalytic sites to the whole cathode area. A single cell with a Ni-BZCY anode, PBFZ cathode, and BaZr0.7Ce0.2Y0.1O3-δ (BZCY) electrolyte membrane was successfully fabricated and tested at 550–700 °C. The maximum power density and Rp were enhanced to 513 mW·cm−2 and 0.3 Ω·cm2 at 700 °C, respectively, due to Zn doping.

Published in Catalysts

ISSN: 2073-4344 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Chemical technology; Science: Chemistry
Website: https://www.mdpi.com/journal/catalysts

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