Designing highly active core/shell cathode materials for low-temperature PCFCs

Lu, Yuzheng; Shah, M.A.K. Yousaf; Almutairi, Badriah S.; Mushtaq, Naveed; Yousaf, Muhammad; Akbar, Nabeela; Arshad, Naila; Shamim, Tariq; Dong, Yiwang

doi:10.1016/j.jallcom.2023.170861

Journal of Alloys and Compounds

2023

DOI: 10.1016/j.jallcom.2023.170861

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Designing highly active core/shell cathode materials for low-temperature PCFCs

Yuzheng Lu

M.A.K. Yousaf Shah

Badriah S. Almutairi

et al.

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2024

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Cited by 3 publications

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Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Yu,

Ge,

et al. 2024

Adv Funct Materials

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As a benchmark triple‐conducting cathode, BaCo0.4Fe0.4Zr0.1Y0.1O3−δ (BCFZY) has been widely investigated for protonic ceramic fuel cells (PCFC) in recent years. However, the reported electrochemical performance of BCFZY cathode differs, which is determined in this work to originate from the thermal expansion mismatch between BCFZY and electrolyte. Accordingly, two strategies for enhanced thermo‐mechanical compatibility are examined: impregnation and thermal expansion offset. In contrast to the impregnation of BCFZY nanoparticles on electrolyte backbones that only helps improve electrochemical performance, negative thermal expansion oxide Sm0.85Cu0.15MnO3−δ (SCM)‐offset BCFZY exhibits superior durability and activity simultaneously. Specifically, the polarization resistance decay rate of the SCM‐offset BCFZY is only ~0.2%/100 h, compared with ~18.75%/100 h for “impregnated BCFZY.” Moreover, pure SCM generates moderate cathodic performance (area‐specific resistance = 0.11 Ω cm2, 700 °C), X‐ray diffraction and transmission electron microscopy reveal an in‐situ formed intergranular Ba2Cu3SmO7−δ phase at the boundaries of BCFZY and SCM. Thus, SCM can serve as a “three‐effect” additive, i) offset thermo‐expansion, ii) strengthen electrode structure and adhesion, and iii) provide acceptable oxygen‐reduction‐reaction activity, being favorable for superior performance. A PCFC using a SCM‐offset BCFZY cathode achieves the highest power density (1455 mW cm−2) yet recorded for PCFCs with BCFZY‐based cathodes.

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Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Yu,

Ge,

et al. 2024

Adv Funct Materials

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Recent progress in oxygen electrodes for protonic ceramic electrochemical cells

Oh,

Kim,

Jeong

et al. 2024

J. Korean Ceram. Soc.

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Protonic ceramic electrochemical cells, a promising technology for energy conversion and storage, have garnered significant interest in recent years owing to their superior low-temperature (< 600 °C) performance relative to solid oxide electrochemical cells. However, the sluggish kinetics of oxygen electrodes have impeded further advancements. Despite considerable research efforts, the development of practically applicable oxygen electrodes remains challenging. We herein review the recent research focusing on the fundamental understanding and development of oxygen electrode materials. Furthermore, we provide a range of material design strategies for enhancing the catalytic activity of oxygen electrodes along with a concise overview of potential derivative applications. Finally, the perspectives and potential directions for the development of oxygen electrodes for high-performance protonic ceramic electrochemical cells are presented.

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Why do BaCo0.4Fe0.4Zr0.1Y0.1O3–δ-derived complex oxides become one of the most promising electrodes for protonic ceramic electrochemical cells? An explanatory review

Tarutina,

Gordeeva,

Matkin

et al. 2024

Chemical Engineering Journal

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Designing highly active core/shell cathode materials for low-temperature PCFCs

Cited by 3 publications

References 54 publications

Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Superior Durability and Activity of a Benchmark Triple‐Conducting Cathode by Tuning Thermo‐Mechanical Compatibility for Protonic Ceramic Fuel Cells

Recent progress in oxygen electrodes for protonic ceramic electrochemical cells

Why do BaCo0.4Fe0.4Zr0.1Y0.1O3–δ-derived complex oxides become one of the most promising electrodes for protonic ceramic electrochemical cells? An explanatory review

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