中温固体氧化物燃料电池LaNi0.6Fe0.4O3-δ阴极材料的制备及性能表征

doi:10.61558/2993-074X.2865

电化学（中英文） ›› 2011, Vol. 17 ›› Issue (4): 421-426. doi: 10.61558/2993-074X.2865

中温固体氧化物燃料电池LaNi0.6Fe0.4O3-δ阴极材料的制备及性能表征

刘珩，黄波*，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市200240

收稿日期:2011-08-19 修回日期:2011-09-09 出版日期:2011-11-28 发布日期:2011-10-20
通讯作者: 黄波 E-mail:huangbo2k@hotmail.com
基金资助:
教育部高等学校博士学科点专项科研基金(20100073120055)资助

Preparation and Characterization of the LaNi0.6Fe0.4O3-δ Cathode for Intermediate Temperature Solid Oxide Fuel Cell

LIU Hang, HUANG Bo*, ZHU Xin-Jian

Institute of Fuel Cell, School of Mechanical Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, China

Received:2011-08-19 Revised:2011-09-09 Published:2011-11-28 Online:2011-10-20
Contact: HUANG Bo E-mail:huangbo2k@hotmail.com

摘要/Abstract

摘要： 以硝酸镧、硝酸镍和硝酸铁为原料，柠檬酸作燃料低温燃烧合成固体氧化物燃料电池阴极材料LaNi0.6Fe0.4O3-δ. X射线衍射(XRD)图谱显示600°C煅烧可形成单一的LaNi0.6Fe0.4O3-δ钙钛矿相，电子显微镜(TEM和SEM)照片看出颗粒尺寸＜100nm.电池交流阻抗谱图表明1050°C烧结的对称电池LaNi0.6Fe0.4O3-δ/ScSZ/LaNi0.6Fe0.4O3-δ极化电阻最小，在850°C、800°C和750°C下搁置电极电阻分别为0.12Ω?cm2、0.27Ω?cm2和0.70Ω?cm2. Fe-Cr合金对搁置于750°C的LaNi0.6Fe0.4O3-δ电极性能的影响是，时间增长，由于Cr2O3(s)在LaNi0.6Fe0.4O3-δ/ScSZ界面上沉积，阻凝活性粒子扩散，从而增加电极极化电阻。

关键词: 固体氧化物燃料电池, 阴极, Fe-Cr合金, Cr沉积, 交流阻抗谱图

Abstract: The LaNi0.6Fe0.4O3-δ as cathode material for intermediate temperature solid oxide fuel cell was prepared using a combustion synthesis technique. The X-ray diffraction (XRD) pattern showed that the single-phase LaNi0.6Fe0.4O3-δ perovskite could be obtained after heat treatment at 600°C. The TEM and SEM images of the synthesized powders revealed that the grains were 50-100nm. According to the electrochemical impedance spectra (EIS), the polarization resistance of the symmetric cell LaNi0.6Fe0.4O3-δ/ScSZ/LaNi0.6Fe0.4O3-δ sintered at 1050°C was the smallest (0.70Ω?cm2, 0.27Ω?cm2 and 0.12Ω?cm2 at 750°C, 800°C and 850°C, respectively). In the presence of the Fe-Cr alloy interconnection at 750°C, the cathode performance showed that, with the time increasing, Cr2O3(s) deposited at the LaNi0.6Fe0.4O3?δ/ScSZ interface suppressed the diffusion of active particle and increased the polarization resistance.

Key words: solid oxide fuel cell, cathode, Fe-Cr alloy, Cr deposition, impedance spectroscopy

刘珩, 黄波, 朱新坚. 中温固体氧化物燃料电池LaNi0.6Fe0.4O3-δ阴极材料的制备及性能表征[J]. 电化学（中英文）, 2011, 17(4): 421-426.

LIU Hang, HUANG Bo, ZHU Xin-Jian. Preparation and Characterization of the LaNi0.6Fe0.4O3-δ Cathode for Intermediate Temperature Solid Oxide Fuel Cell[J]. Journal of Electrochemistry, 2011, 17(4): 421-426.

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中温固体氧化物燃料电池LaNi0.6Fe0.4O3-δ阴极材料的制备及性能表征

Preparation and Characterization of the LaNi0.6Fe0.4O3-δ Cathode for Intermediate Temperature Solid Oxide Fuel Cell

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