Improving the performance of Pr0.4Sr0.6Co0.2Fe0.7Nb0.1O3-δ-based single-component fuel cell and reversible single-component cells by manufacturing A-site deficiency

Ping Li, Runze Dong, Yuchen Wang, Fei Yan, Lemeng Wang, Ming Li and Dong Fu

Renewable Energy, 2021, vol. 177, issue C, 387-396

Abstract: A-site deficiency perovskite oxides, Pr0.35Sr0.6Co0.2Fe0.7Nb0.1O3-δ, and Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ are prepared and act as the semiconductor for single-component fuel cell (SCFC) and reversible single-component cell (RSCC). After reduction, the perovskite oxides can in situ exsolve Co3Fe7 alloy nanoparticles on perovskite and Ruddlesden−Popper structure oxide matrix, further facilitating the hydrogen oxidation reaction. In addition, Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ and reduced Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ have the most oxygen vacancies. Furthermore, Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ based SCFC exhibits the highest cell performance and the mximum power densities (Pmax) are 109.6, 145.2, and 211.1 mW cm−2 at 600, 650, and 700 °C, respectively. It is because Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ shows the highest catalytic activity for oxygen reduction reaction (ORR) and the reduced Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ exhibits the highest catalytic activity for hydrogen oxidation reaction (HOR). For RSCC, when 53%H2-47%H2O fuel is applied and the Pmax values are 105.7, 143.0, and 179.6 mW cm−2 at 700, 650, and 600 °C, respectively in solid oxide fuel cell (SOFC) mode and the current densities are −127.2, −205.8, and −265.0 mA cm−2 under 1.3 V at 600, 650, and 700 °C, respectively in solid oxide electrolysis cell (SOEC) mode, indicating that Pr0.4Sr0.55Co0.2Fe0.7Nb0.1O3-δ based RSCC can generate the most hydrogen in SOEC mode.

Keywords: Single-component fuel cell; Reversible single-component cell; Perovskite; Co-Fe alloy; A-site deficiency (search for similar items in EconPapers)
Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:177:y:2021:i:c:p:387-396

DOI: 10.1016/j.renene.2021.05.141

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