李若宇, 李晓宇, 张金柯, 高源, 凌意瀚. 一种高熵稳定的钙钛矿氧化物La0.2Pr0.2Sm0.2Gd0.2Sr0.2Co0.8Fe0.2O3-δ作为可逆固体氧化物电池的空气电极材料[J]. 燃料化学学报(中英文). DOI: 10.1016/S1872-5813(24)60486-X
引用本文: 李若宇, 李晓宇, 张金柯, 高源, 凌意瀚. 一种高熵稳定的钙钛矿氧化物La0.2Pr0.2Sm0.2Gd0.2Sr0.2Co0.8Fe0.2O3-δ作为可逆固体氧化物电池的空气电极材料[J]. 燃料化学学报(中英文). DOI: 10.1016/S1872-5813(24)60486-X
LI Ruoyu, LI Xiaoyu, ZHANG Jinke, GAO Yuan, LING Yihan. A high entropy stabilized perovskite oxide La0.2Pr0.2Sm0.2Gd0.2Sr0.2Co0.8Fe0.2O3-δ as a promising air electrode for reversible solid oxide cells[J]. Journal of Fuel Chemistry and Technology. DOI: 10.1016/S1872-5813(24)60486-X
Citation: LI Ruoyu, LI Xiaoyu, ZHANG Jinke, GAO Yuan, LING Yihan. A high entropy stabilized perovskite oxide La0.2Pr0.2Sm0.2Gd0.2Sr0.2Co0.8Fe0.2O3-δ as a promising air electrode for reversible solid oxide cells[J]. Journal of Fuel Chemistry and Technology. DOI: 10.1016/S1872-5813(24)60486-X

一种高熵稳定的钙钛矿氧化物La0.2Pr0.2Sm0.2Gd0.2Sr0.2Co0.8Fe0.2O3-δ作为可逆固体氧化物电池的空气电极材料

A high entropy stabilized perovskite oxide La0.2Pr0.2Sm0.2Gd0.2Sr0.2Co0.8Fe0.2O3-δ as a promising air electrode for reversible solid oxide cells

  • 摘要: 可逆固体氧化物电池(RSOC)是一种新型的能量转换装置,具有重要的应用价值,特别是在电网调峰方面。然而,发电/储能的可逆转换过程对空气电极的性能和稳定性提出了挑战。本研究提出了一种新型高熵氧化物 La0.2Pr0.2Gd0.2Sm0.2Sr0.2Co0.8Fe0.2O3-δ(HE-LSCF),并将其作为 RSOC 中的空气电极进行了研究。研究了 HE-LSCF 作为空气电极在燃料电池和电解模式下的电化学行为。在 800 °C 的空气环境中,HE-LSCF 电极的极化阻抗(Rp)仅为 0.25 Ω cm2。在 2 V 的电解电压和 800 ℃ 的温度下,电流密度高达 1.68 A/cm2。HE-LSCF 空气电极具有出色的可逆性和稳定性,其电化学性能在可逆操作 100 小时后仍然保持稳定。HE-LSCF 的这些优点表明它是一种用于 RSOC 的优秀空气电极。

     

    Abstract: Reversible solid oxide cell (RSOC) is a new energy conversion device with significant applications, especially for power grid peaking shaving. However, the reversible conversion process of power generation/energy storage poses challenges for the performance and stability of air electrodes. In this work, a novel high-entropy perovskite oxide La0.2Pr0.2Gd0.2Sm0.2Sr0.2Co0.8Fe0.2O3-δ (HE-LSCF) is proposed and investigated as an air electrode in RSOC. The electrochemical behavior of HE-LSCF was studied as an air electrode in both fuel cell and electrolysis modes. The polarization impedance (Rp) of the HE-LSCF electrode is only 0.25 Ω cm2 at 800 °C in an air atmosphere. Notably, at an electrolytic voltage of 2 V and a temperature of 800 °C, the current density reaches up to 1.68 A cm−2. The HE-LSCF air electrode exhibited excellent reversibility and stability, and its electrochemical performance remains stable after 100 hours of reversible operation. With these advantages, HE-LSCF is shown to be an excellent air electrode for RSOC.

     

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