The solid oxide electrolysis cell (SOEC) and its developement are in an increasing focus, because of its high efficiency and eco‐friendliness in storing energy by converting electrical energy into hydrogen. Recently, research has been conducted to decrease the operation temperature of SOECs below 750 °C to overcome high system costs and rapid degradation rate at high operation temperatures. Although La_0.6Sr_0.4Co_0.2Fe_0.8O_3–δ (LSCF) is a promising oxygen electrode for SOEC, when the operating temperature is reduced, the reaction kinetics of the LSCF oxygen electrode is significantly decreased due to high activation energy of the oxygen ion transport. To address this issue, we developed a composite oxygen electrode of LSCF combined with Gd and Nd double doped ceria (GNDC). Due to excellent oxygen ion transport nature of GNDC, the SOEC with the LSCF‐GNDC oxygen electrode yielded impressive current density of ∼1,174 mA cm⁻² at 1.3 V at 750 °C along with excellent stability. These results demonstrated that the novel LSCF‐GNDC composite is promising as an efficient and durable oxygen electrode for SOEC applications.

中文翻译：

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通过掺入Gd3 +和Nd3 +双掺杂氧化铈来提高固体氧化物电解槽的性能

固体氧化物电解池（SOEC）及其发展日益受到关注，因为它通过将电能转化为氢能高效而环保地存储能量。最近，已经进行了将SOEC的工作温度降低到750℃以下的研究，以克服高系统成本和在高工作温度下的快速降解速率。尽管La _0.6 Sr _0.4 Co _0.2 Fe _0.8 O _{3– δ}（LSCF）是一种有前景的SOEC氧电极，当降低工作温度时，由于氧离子传输的高活化能，LSCF氧电极的反应动力学显着降低。为了解决这个问题，我们开发了一种结合了Gd和Nd双掺杂氧化铈（GNDC）的LSCF复合氧电极。由于GNDC具有出色的氧离子传输特性，带有LSCF‐GNDC氧电极的SOEC在750°C的1.3 V电压下产生了令人印象深刻的电流密度，约为1,174 mA cm ^-2，并具有出色的稳定性。这些结果表明，新型LSCF-GNDC复合材料有望成为SOEC应用中高效而耐用的氧电极。