Optimization on the electrochemical properties of La2NiO4+δ cathodes by tuning the cathode thickness
Optimization on the electrochemical properties of La2NiO4+δ cathodes by tuning the cathode thickness
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通过调整阴极厚度优化 La2NiO4 δ 阴极的电化学性能
DOI：
10.1016/j.ijhydene.2018.01.024
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发表时间：
2018-03
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;Zhao Kai;Xu Qing;Huang Duan-Ping;Chen Min;Kim Bok-Hee
基于三电极半电池研究了 La2NiO4+δ 电极的电化学性能随电极厚度的变化。通过电化学阻抗谱技术在开路电压条件下测量了 5 至 30 μm 不同厚度的电极的电催化活性。还检查了这些电极的阴极极化曲线。结果表明这些电极的电化学性能高度依赖于它们的厚度。随着电极厚度的变化，所涉及的电极反应过程的极化表现出不同的变化。调整电极厚度被证实对于优化电化学性能是有效的。在所研究的电极中，厚度为 ∼20 μm 的电极实现了最佳性能。在空气中 800 °C 时，该电极表现出 0.24 Ω cm2 的极化电阻、201 mA cm−2 的交换电流密度以及 200 mA cm−2 下 40 mV 的过电势。在此基础上，制备了具有〜20μm厚的La2NiO4+δ阴极的阳极支撑单电池。在 800 °C 并使用氢燃料时，该单电池获得了 500 mW cm−2 的最大粉末密度。
The electrochemical properties of La2NiO4+δelectrodes were investigated as a function of the electrode thickness based on three-electrode half cells. The electrocatalytic activity of the electrodes with the varied thicknesses ranging from 5 to 30 μm was surveyed by electrochemical impedance spectroscopy technique under open-current voltage conditions. The cathodic polarization curves of these electrodes were also inspected. The results indicated that the electrochemical properties of these electrodes were highly dependent on their thickness. The polarizations of involved electrode reaction processes displayed different variations with changing the electrode thickness. Tuning the electrode thickness was confirmed to be effective for optimizing the electrochemical properties. Among the investigated electrodes, the electrode with a thickness of ∼20 μm achieved the optimal properties. At 800 °C in air, this electrode exhibited a polarization resistance of 0.24 Ω cm2, an exchange current density of 201 mA cm−2and an overpotential of 40 mV at 200 mA cm−2. On this ground, an anode-supported single cell with ∼20 μm thick La2NiO4+δcathode was fabricated. At 800 °C and using hydrogen fuel, this single cell attained a maximum powder density of 500 mW cm−2.
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La2Ni0.8Cu0.2O4 δ电极对氧还原反应电催化活性提高的诊断
影响因子：
6.7
作者：
Wang Ya-Ping;Xu Qing;Huang Duan-Ping;Zhao Kai;Chen Min;Kim Bok-Hee
通讯作者：
Kim Bok-Hee
影响因子：
8.6
作者：
Kharton, Vladislav V.;Kovalevsky, Andrei V.;Frade, Jorge R.
通讯作者：
Frade, Jorge R.
DOI：
10.1088/0022-3727/46/12/125305
发表时间：
2013-02
期刊：
Journal of Physics D: Applied Physics
影响因子：
--
作者：
X. H. Yang;T. Lu;T. Kim
通讯作者：
X. H. Yang;T. Lu;T. Kim
影响因子：
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作者：
Simner, S. P.;Anderson, M. D.;Stevenson, J. W.
通讯作者：
Stevenson, J. W.
影响因子：
3.2
作者：
TAI, LW;NASRALLAH, MM;SEHLIN, SR
通讯作者：
SEHLIN, SR