中温固体氧化物燃料电池LaNi0.6Fe0.4O3-δ-Gd0.2Ce0.8O2梯度复合阴极制备及交流阻抗性能

doi:10.13208/j.electrochem.121206

电化学（中英文） ›› 2014, Vol. 20 ›› Issue (1): 45-50. doi: 10.13208/j.electrochem.121206

中温固体氧化物燃料电池LaNi_0.6Fe_0.4O_3-δ-Gd_0.2Ce_0.8O₂梯度复合阴极制备及交流阻抗性能

李扬，黄波^*，袁梦，张志秋，刘宗尧，唐旭晨，朱新坚

上海交通大学机械与动力工程学院，燃料电池研究所，上海 200240

收稿日期:2012-12-06 修回日期:2013-02-21 发布日期:2014-02-24 出版日期:2014-02-25
通讯作者: 黄波 E-mail:huangbo2k@hotmail.com
基金资助:
国家自然科学基金项目(No. 51201098)资助

Fabrication and Impedance Performance of Gradient LaNi_0.6Fe_0.4O_3-δ-Gd_0.2Ce_0.8O₂Composite Cathodes for Intermediate Temperature Solid Oxide Fuel Cell

LI Yang, HUANG Bo^*, YUAN Meng, ZHANG Zhi-qiu, LIU Zong-yao, TANG Xu-chen, ZHU Xin-jian

Institute of Fuel Cell, School of Mechanical Engineering, Shanghai Jiaotong University, Shanghai 200240, China

Received:2012-12-06 Revised:2013-02-21 Online:2014-02-24 Published:2014-02-25
Contact: HUANG Bo E-mail:huangbo2k@hotmail.com

摘要/Abstract

摘要： 应用丝网印刷和共烧结制备LaNi_0.6Fe_0.4O_3-δ(LNF)-Gd_0.2Ce_0.8O₂(GDC)梯度复合阴极/Gd_0.2Ce_0.8O₂/Sc_0.1Zr_0.9O_1.95(ScSZ)/Gd_0.2Ce_0.8O₂/LaNi_0.6Fe_0.4O_3-δ(LNF)-Gd_0.2Ce_0.8O₂(GDC)，组成梯度复合阴极对称电池. 实验表明，在750 ^oC工作温度下单层70%LNF-30%GDC（文中均指质量百分比）复合阴极的极化电阻为0.581 Ω·cm²，而三层60%LNF-40%GDC/70%LNF-30%GDC/100%LNF复合阴极的极化电阻最小（0.452 Ω·cm²）. 由于阴极组成在ScSZ电解质和LNF阴极之间呈梯度变化，因此获得了最佳的阴极/电解质界面，大大加快了三相界面或气体/阴极/电解质三相接触点反应区的扩散，其电荷传递电阻R_ct和浓差极化电阻R_d均减小，因而具有最低的阴极极化电阻值.

关键词: 固体氧化物燃料电池；LaNi_0.6Fe_0.4O_3-&delta, 阴极；梯度阴极；极化电阻；交流阻抗

Abstract: A LNF-GDC composite cathode with a gradual change in the composition between ScSZ electrolyte and LNF cathode was fabricated to reduce the cathode polarization resistance (R_p). The gradual change in composition between ScSZ electrolyte and LNF cathode shows the decreases in the charge transfer resistance (R_ct) and gas phase diffusion resistance (R_d). The results revealed that the Rp value, measuring 0.452 Ω·cm² at 750 °C, was the lowest for LNF-GDC composite cathodes with three layers and gradient changes in composition between ScSZ and LNF (Cathode C),, whereas the Rp value of 70%LNF-30%GDC composite cathodes with one layer (Cathode A) was 0.581 Ω·cm². The reduction in Rp for the LNF-GDC composite cathodes with three layers and gradient changes in composition between ScSZ and LNF may be related to the fact that the microstructure of the cathode/electrolyte interfaces is significantly improved, resulting in the increase in the area of triple phase boundaries (TPBs), which enhanced the surface exchange of oxygen. This implied that the gradient LNF-GDC composite cathodes showed excellent performance in terms of its electrochemical properties.

Key words: solid oxide fuel cell, LaNi_0.6Fe_0.4O_3-δ cathode, gradient cathode, polarization resistance, electrochemical impedance spectroscopy

中图分类号:

O646

李扬，黄波*，袁梦，张志秋，刘宗尧，唐旭晨，朱新坚. 中温固体氧化物燃料电池LaNi_0.6Fe_0.4O_3-δ-Gd_0.2Ce_0.8O₂梯度复合阴极制备及交流阻抗性能[J]. 电化学（中英文）, 2014, 20(1): 45-50.

LI Yang, HUANG Bo*, YUAN Meng, ZHANG Zhi-qiu, LIU Zong-yao, TANG Xu-chen, ZHU Xin-jian. Fabrication and Impedance Performance of Gradient LaNi_0.6Fe_0.4O_3-δ-Gd_0.2Ce_0.8O₂Composite Cathodes for Intermediate Temperature Solid Oxide Fuel Cell[J]. Journal of Electrochemistry, 2014, 20(1): 45-50.

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链接本文: https://electrochem.xmu.edu.cn/CN/10.13208/j.electrochem.121206

https://electrochem.xmu.edu.cn/CN/Y2014/V20/I1/45

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中温固体氧化物燃料电池LaNi_0.6Fe_0.4O_3-δ-Gd_0.2Ce_0.8O₂梯度复合阴极制备及交流阻抗性能

Fabrication and Impedance Performance of Gradient LaNi_0.6Fe_0.4O_3-δ-Gd_0.2Ce_0.8O₂Composite Cathodes for Intermediate Temperature Solid Oxide Fuel Cell

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