YSZ-based SOFC with modified electrode/electrolyte interfaces for operating at temperature lower than 650 °C
YSZ-based SOFC with modified electrode/electrolyte interfaces for operating at temperature lower than 650 °C
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DOI：
10.1016/j.jpowsour.2008.01.066
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发表时间：
2008-05
影响因子：
9.2
通讯作者：
Mingfei Liu;D. Dong;R. Peng;Jian-feng Gao;Juan Diwu;Xing-qin Liu;G. Meng
中科院分区：
文献类型：
--
作者：
Mingfei Liu;D. Dong;R. Peng;Jian-feng Gao;Juan Diwu;Xing-qin Liu;G. Meng
在阳极/电解液和/或电解液/阴极界面引入NiO/Y稳定的氧化锆(YSZ)过渡层和/或SDC功能层，以减小电极/电解液界面传质引起的活化极化。加入NiO/YSZ过渡层后，从I-V曲线模拟的激活极化在600℃时由4.42Ωcm2降至2.42 cm2，比电池I的激活极化低约45%，但没有明显的激活极化。通过引入过渡层和SDC功能层，电池的性能也得到了显著的改善。在600℃和650℃时，同时具有过渡层和功能层的单电池的峰值功率密度分别达到187mWcm和443mWcm−2，比没有任何结构改进的电池提高了87%和95%，比只有阳极过渡层的电池提高了约30%和25%。交流阻抗谱研究还表明，通过改善界面可以有效地降低电池电阻的主要来源--界面极化电阻。
A NiO/Yttrium-stabilized zirconia (YSZ) transition layer and/or a SDC function layer were introduced into the anode/electrolyte and/or electrolyte/cathode interface to decrease the activation polarization resulted from the mass transfer at electrode/electrolyte interface. With a NiO/YSZ transition layer, the activation polarization simulated from I–V curves drops from 4.42 to 2.42Ωcm2at 600°C, about 45% less than that of cell I; with additional SDC function layer, no activation polarization is obviously observed. The cell performance was also remarkably improved with the introduction of both the transition layer and the SDC function layer. Peak power densities of 187 and 443mWcm−2at 600 and 650°C, respectively, were achieved for a single cell with both a transition layer and a function layer, with an increment of 87% and 95% compared to that of the cell without any structural improvement, and about 30% and 25% compared to that of the cell with only anode transition layer. The study by ac impedance spectroscopy technique also indicated that the interfacial polarization resistance, the main source of cell resistance, could be effectively reduced by interface improvement.