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<p>Proton ceramic fuel cell efficiently converts chemical energy into electrical energy, representing a pivotal component of future energy systems. However, its current performance is hindered by limitations in cathode and electrolyte materials, thereby impeding commercialization. Anion doping emerges as a promising strategy to enhance the electrochemical efficiency of perovskite-based cathodes and electrolytes. However, integrating this approach within a single-cell structure still requires further research. In this study, F-doped perovskite oxides BaCo<sub>0.4</sub>Fe<sub>0.4</sub>Zr<sub>0.1</sub>Y<sub>0.1</sub>O<sub>2.9-<i>δ</i></sub>F<sub>0.1</sub> (BCFZYF) and BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>2.9-<i>δ</i></sub>F<sub>0.1</sub> (BZCYYbF) were synthesized for use as the cathode and electrolyte, respectively, in proton ceramic fuel cells. Our findings demonstrate that F-doped perovskite oxides exhibit superior electrochemical performance and enhanced structural stability. Furthermore, doping both electrodes and electrolytes with F ions improves their interfacial compatibility. The cell configuration BCFZYF | BZCYYbF | Ni-BZCYYbF achieved a peak power density of 998&#xa0;mW·cm<sup>−2</sup> at 650&#xa0;°C using H<sub>2</sub> as fuel, and it maintained stable operation for over 400&#xa0;h at 550&#xa0;°C with a current density of 400&#xa0;mA·cm<sup>−2</sup>. This research underscores an effective strategy for enhancing the performance and durability of proton ceramic fuel cells.</p> Graphical abstract <p></p>

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Enhancing performance of proton ceramic fuel cells through fluorine-doped perovskite oxides

  • 期刊论文

  • 发表日期：

    2025年1月9日

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  • Wen-Huai Li,
  • Yong-Xin Li,
  • Yan Yang,
  • Yang-Feng Song,
  • Wen-Xin Liu,
  • Wei-Feng Chen,
  • Yao-Ji Chen,
  • Feng-Ping Yu,
  • Chun-Liang Ge,
  • Yu Guo,
  • Ran Ran,
  • Wei Zhou

摘要

Proton ceramic fuel cell efficiently converts chemical energy into electrical energy, representing a pivotal component of future energy systems. However, its current performance is hindered by limitations in cathode and electrolyte materials, thereby impeding commercialization. Anion doping emerges as a promising strategy to enhance the electrochemical efficiency of perovskite-based cathodes and electrolytes. However, integrating this approach within a single-cell structure still requires further research. In this study, F-doped perovskite oxides BaCo0.4Fe0.4Zr0.1Y0.1O2.9-δF0.1 (BCFZYF) and BaZr0.1Ce0.7Y0.1Yb0.1O2.9-δF0.1 (BZCYYbF) were synthesized for use as the cathode and electrolyte, respectively, in proton ceramic fuel cells. Our findings demonstrate that F-doped perovskite oxides exhibit superior electrochemical performance and enhanced structural stability. Furthermore, doping both electrodes and electrolytes with F ions improves their interfacial compatibility. The cell configuration BCFZYF | BZCYYbF | Ni-BZCYYbF achieved a peak power density of 998 mW·cm−2 at 650 °C using H2 as fuel, and it maintained stable operation for over 400 h at 550 °C with a current density of 400 mA·cm−2. This research underscores an effective strategy for enhancing the performance and durability of proton ceramic fuel cells.

Graphical abstract