In this study, the crystal structure, thermal, oxygen transport, electrical conductivity and electrochemical properties of the perovskite NdBa_0.5Sr_0.5Co₂O_5+δ (NBSC55) are investigated. In the temperature range of 250 °C–350 °C, the weight loss upon heating was due to a partial loss of lattice oxygen and along with a reduction of Co⁴⁺ to Co³⁺. The tend of weight-loss slows down as temperature increased above 350 °C indicating a reduction of Co³⁺ to Co²⁺ during this stage. The oxygen migration is dominated by surface exchange process at high temperature range (650-800 °C); however, the bulk diffusion process prevails at low temperature range (500–600 °C). For long-term testing, the polarization resistance of NBSC55 increases gradually form 3.13 Ω cm² for 2 h to 3.34 Ω cm² for 96 h at 600 °C and an increasing-rate for polarization resistance is around 0.22% h⁻¹. The power density of the single cell with NBSC55 cathode reached 341 mW cm⁻² at 800 °C.

在这项研究中，研究了钙钛矿NdBa _0.5 Sr _0.5 Co ₂ O _{5 +δ}（NBSC55）的晶体结构，热，氧输运，电导率和电化学性能。在250°C–350°C的温度范围内，加热时的重量损失是由于晶格氧的部分损失以及Co ⁴⁺还原为Co ^3+引起的。随着温度升高至350°C以上，体重减轻的趋势减慢，表明Co ³⁺减少为Co ²⁺在这个阶段。在高温范围（650-800°C）下，氧的迁移主要受表面交换过程的影响。但是，体扩散过程主要在低温范围（500–600°C）下进行。对于长期测试，NBSC55的极化电阻在600°C下从2.13Ωcm ²持续2 h逐渐增加到3.34Ωcm ²持续96 h，并且极化电阻的增加速率约为0.22％h ^-1。具有NBSC55阴极的单电池的功率密度在800°C时达到341 mW cm ^-2。