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<p>Nanocomposites based on lanthanum and strontium have grabbed much attention of various researchers as potential candidates for solid oxide fuel cell (SOFC) electrodes. However, the chemical instability of cations segregation at elevated temperatures leads the cell towards performance degradation. Furthermore, the oxygen reduction reactions (ORRs) are responsible for higher activation energies hindering the utilization of these electrodes at low temperatures. This research has significantly improved the reactivity and stability of “lanthanum and strontium based nanocomposites” in combination with metallic additives such as copper, manganese and zinc. Co-precipitation route was followed for the preparation of LSC (LaSr<sub>0.8</sub>Cu<sub>0.2</sub>O<sub>3−δ</sub>), LSM (LaSr<sub>0.8</sub>Mn<sub>0.2</sub>O<sub>3−δ</sub>), and LSZ (LaSr<sub>0.8</sub>Zn<sub>0.2</sub>O<sub>3−δ</sub>) at temperature ~ 800&#xa0;°C. The maximum electrical conductivity was measured for LSM (approximately 6.49&#xa0;S/cm), compared to 5.91&#xa0;S/cm for LSC, and 5.32&#xa0;S/cm for LSZ. The activation energies were determined to be approximately 0.46&#xa0;eV (LSC), 0.49&#xa0;eV (LSM), and 0.41&#xa0;eV (LSZ), while the polarization resistances were about 0.25 Ω (LSC), 1.42 Ω (LSM), and 1.09 Ω (LSZ). Nyquist plots in connection with BET analysis provided in-depth details about the material’s surface properties and electrochemical behavior. BET analysis in this study determined LSM material to be more active electrochemically compared to LSC and LSZ Power densities were in the range ~ 910 mW/cm<sup>2</sup> (for LSM) ˃ 836 mW/cm<sup>2</sup> (for LSC) ˃ and 718 mW/cm<sup>2</sup> (for LSZ). The improved properties of the as-synthesized, metal-enhanced “lanthanum and strontium based nanocomposites” suggest an innovative pathway toward their commercialization.</p> Graphical Abstract <p></p>

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Lanthanum and strontium based metal oxide nanocomposites for low temperature solid oxide fuel cell

  • 期刊论文

  • 发表日期：

    2025年7月31日

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  • Kausar Shaheen,
  • Zarbad Shah,
  • Awais Ahmed

摘要

Nanocomposites based on lanthanum and strontium have grabbed much attention of various researchers as potential candidates for solid oxide fuel cell (SOFC) electrodes. However, the chemical instability of cations segregation at elevated temperatures leads the cell towards performance degradation. Furthermore, the oxygen reduction reactions (ORRs) are responsible for higher activation energies hindering the utilization of these electrodes at low temperatures. This research has significantly improved the reactivity and stability of “lanthanum and strontium based nanocomposites” in combination with metallic additives such as copper, manganese and zinc. Co-precipitation route was followed for the preparation of LSC (LaSr0.8Cu0.2O3−δ), LSM (LaSr0.8Mn0.2O3−δ), and LSZ (LaSr0.8Zn0.2O3−δ) at temperature ~ 800 °C. The maximum electrical conductivity was measured for LSM (approximately 6.49 S/cm), compared to 5.91 S/cm for LSC, and 5.32 S/cm for LSZ. The activation energies were determined to be approximately 0.46 eV (LSC), 0.49 eV (LSM), and 0.41 eV (LSZ), while the polarization resistances were about 0.25 Ω (LSC), 1.42 Ω (LSM), and 1.09 Ω (LSZ). Nyquist plots in connection with BET analysis provided in-depth details about the material’s surface properties and electrochemical behavior. BET analysis in this study determined LSM material to be more active electrochemically compared to LSC and LSZ Power densities were in the range ~ 910 mW/cm2 (for LSM) ˃ 836 mW/cm2 (for LSC) ˃ and 718 mW/cm2 (for LSZ). The improved properties of the as-synthesized, metal-enhanced “lanthanum and strontium based nanocomposites” suggest an innovative pathway toward their commercialization.

Graphical Abstract