Evaluation of La1.8Sr0.2NiO4+delta as cathode for intermediate temperature solid oxide fuel cells
Evaluation of La1.8Sr0.2NiO4+delta as cathode for intermediate temperature solid oxide fuel cells
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La1.8Sr0.2NiO4 δ作为中温固体氧化物燃料电池阴极的评价
DOI：
10.1016/j.ijhydene.2016.03.019
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发表时间：
2016
影响因子：
7.2
通讯作者：
Kim Bok-Hee
中科院分区：
文献类型：
--
作者：
Wang Ya-Ping;Xu Qing;Huang Duang-Ping;Zhao Kai;Chen Min;Kim Bok-Hee
针对中温固体氧化物燃料电池阴极的应用，研究了La1.8Sr0.2NiO4+δ的导电、热膨胀和电化学性能。 La1.8Sr0.2NiO4+δ 在 600–800°C 时的电导率为 96–114 S cm−1，在 50 至 1000 °C 时热膨胀系数为 12.6 × 10−6K−1。基于三电极半电池，利用电化学阻抗谱和计时电位技术诊断了La1.8Sr0.2NiO4+δ的电极性能。此外，还检查了带有La1.8Sr0.2NiO4+δ阴极的阳极支撑单电池的性能。与La2NiO4+δ相比，La1.8Sr0.2NiO4+δ在阴极极化条件下表现出改善的电极性能，同时在开路条件下表现出类似的催化活性。在 800 °C 空气中，La1.8Sr0.2NiO4+δ 电极的极化电阻为 0.41 Ω cm2，在 200 mA cm−2 电流下的阴极过电位为 90 mV。带有 La1.8Sr0.2NiO4+δ 阴极的阳极支撑单电池在 800 °C 的氢燃料中实现了 520 mW cm−2 的最大功率密度。
The electrical conducting, thermal expansion and electrochemical properties of La1.8Sr0.2NiO4+δwere investigated in view of cathode utilization for intermediate temperature solid oxide fuel cells. La1.8Sr0.2NiO4+δexhibited electrical conductivities of 96–114 S cm−1at 600–800 °C and a thermal expansion coefficient of 12.6 × 10−6K−1between 50 and 1000 °C. Based on a three-electrode half cell, the electrode properties of La1.8Sr0.2NiO4+δwere diagnosed using electrochemical impedance spectroscopy and chronopotentiometry techniques. Moreover, the performance of an anode-supported single cell with La1.8Sr0.2NiO4+δcathode was examined. Compared with La2NiO4+δ, La1.8Sr0.2NiO4+δmanifested improved electrode properties under cathodic polarization conditions while showing an analogous catalytic activity under open-circuit conditions. At 800 °C in air, La1.8Sr0.2NiO4+δelectrode displayed a polarization resistance of 0.41 Ω cm2and a cathodic overpotential of 90 mV at 200 mA cm−2. The anode-supported single cell with La1.8Sr0.2NiO4+δcathode achieved a maximum power density of 520 mW cm−2at 800 °C in hydrogen fuel.