Sr-free orthorhombic perovskite Pr0.8Ca0.2Fe0.8Co0.2O3-8 as a high-performance air electrode for reversible solid oxide cell
Sr-free orthorhombic perovskite Pr0.8Ca0.2Fe0.8Co0.2O3-8 as a high-performance air electrode for reversible solid oxide cell
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DOI：
10.1016/j.jpowsour.2022.231202
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发表时间：
2022-02-27
影响因子：
9.2
通讯作者：
Chi, Bo
中科院分区：
文献类型：
--
作者：
Li, Yitong;Tian, Yunfeng;Chi, Bo
可逆固体氧化物电池(RSOCs)作为一种清洁高效的电化学转换和存储装置，受到了广泛的关注。PrFeO_3-8被用作RSOCs的空气电极时，被研究以获得优异的性能。在本工作中，我们研究了一种新型的PrFeO_3-8基正交型钙钛矿氧化物Pr0.8Ca0.2Fe0.8Co0.203-8，并将其用作RSOCs的空气电极。详细介绍了以Pr0.8Ca0.2Fe0.8Co0.203-8为电极的电池的电化学性能。以氢为燃料的燃料电池模式在850C时最高功率密度可达1.762 W cm(-2)。在电解槽模式下，当绝对湿度为50Vol%，电压为1.3V时，850℃时的电解电流密度为2.23A cm(-2)。此外，在长达200h的长期运行中，该电池可以保持稳定，并在两种模式下表现出良好的可逆性。这些结果表明，钙钛矿型Pr0.8Ca0.2Fe0.8Co0.203-8是一种很有前途的RSOCs空气电极。
Reversible solid oxide cells (RSOCs) as clean and efficient electrochemical conversion and storage devices have received much attention. PrFeO3-8 has been investigated to obtain excellent performance when it is used as air electrode for RSOCs. In this work, we investigate a novel PrFeO3-8 based orthorhombic perovskite oxide Pr0.8Ca0.2Fe0.8Co0.2O3-8 and use it as the air electrode of RSOCs. The electrochemical performance of this cell with Pr0.8Ca0.2Fe0.8Co0.2O3-8 electrode is presented in detail. The highest power density at 850 C can reach 1.762 W cm(-2) in fuel cell mode using hydrogen as fuel. And the electrolysis current density of 2.23 A cm(-2) at 850 C can be achieved under the condition of 50 vol % absolute humidity at 1.3 V in electrolysis cell mode. Moreover, during a long-term operation of up to 200 h, this cell can remain stable and shows good reversibility in two modes. These results demonstrate that the perovskite Pr0.8Ca0.2Fe0.8Co0.2O3-8 is promising air electrode for RSOCs.