In this work, La₂NiO_4+δ-xCe_0.55La_0.45O_2−δ (denoted as LNO-xLDC) with various LDC contents (x = 0, 10, 20, 30, and 40 wt%) were prepared and evaluated as bifunctional oxygen electrodes for reversible solid oxide cells (RSOCs). Compared with the pure LNO, the optimum composition of LNO-30LDC exhibited the lowest polarization resistance (R_p) of 0.53 and 0.12 Ω·cm² in air at 650 and 750 °C, respectively. The enhanced electrochemical performance of LNO-30LDC oxygen electrode was mainly attributed to the extended triple phase boundary and more oxygen ionic transfer channels. The hydrogen electrode supported single cell with LNO-30LDC oxygen electrode displayed peak power densities of 276, 401, and 521 mW·cm⁻² at 700, 750, and 800 °C, respectively. Moreover, the electrolysis current density of the single cell demonstrated 526.39 mA·cm⁻² under 1.5 V at 800 °C, and the corresponding hydrogen production rate was 220.03 mL·cm⁻²·h⁻¹. The encouraging results indicated that LNO-30LDC was a promising bifunctional oxygen electrode material for RSOCs.

在这项工作中，制备了具有各种LDC含量（x = 0、10、20、30和40 wt％）的La ₂ NiO _{4+ δ} - x Ce _0.55 La _0.45 O _{2- δ}（表示为LNO- x LDC）。并被评估为可逆固体氧化物电池（RSOC）的双功能氧电极。与纯LNO相比，LNO-30LDC的最佳组成具有最低的极化电阻（R _p）为0.53和0.12Ω ·cm ^2。分别在650和750°C的空气中。LNO-30LDC氧电极的电化学性能增强主要归因于扩展的三相边界和更多的氧离子转移通道。具有LNO-30LDC氧电极的氢电极支撑的单电池在700、750和800°C时分别显示出276、401和521 mW·cm ^-2的峰值功率密度。另外，在800℃，1.5V下，单电池的电解电流密度为526.39mA·cm ^-2，相应的氢生成率为220.03mL·cm ^-2 ·h ^-1。令人鼓舞的结果表明，LNO-30LDC是一种有前途的RSOCs双功能氧电极材料。