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。
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, 2011
, 17(4)
: 421
-426
.
DOI: 10.61558/2993-074X.2865
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.
[1] Lv S Q (吕世权), Long G W (龙国徽), Meng X W (孟祥伟), et al. Perovskite cathode for solid oxide fuel cells [J]. Chinese Journal of Power Sources (电源技术), 2010, 34 (7): 734-737.
[2] Guo Y B (郭友斌), Lu L H (陆丽华), Chu L (储凌), et al. Research progress in perovskite-like cathode for intermediate temperature solid oxide fuel cells [J]. Bulletin of the Chinese Ceramic Society, (硅酸盐通报), 2009, 28 (5): 991-996.
[3] Wu L W (邬理伟), Zheng Y P (郑颖平), Sun Y M (孙岳明). Research progress in composite cathode of SOFC [J]. Chinese Battery Industry (电池工业), 2010, 15 (1): 53-56.
[4] Kadowaki T, Shiomitsu T, Marsuda E, et al. Applicability of heat resisting alloys to the separator of planar type solid oxide fuel cell [J]. Solid State Ionics, 1993, 67 (1/2): 65-69.
[5] Yang Z G, Weil K S, Paxton D M, et al. Selection and evaluation of heat-resistant alloys for SOFC interconnect application [J]. Journal of the Electrochemical Society, 2003, 150(9): A1188-A1201.
[6] Horita T, Xiong Y P, Kishimoto H, et al. Application of Fe–Cr alloys to solid oxide fuel cells for cost-reduction: Oxidation behavior of alloys in methane fuel [J]. Journal of Power Sources, 2004, 131 (1/2): 293-298.
[7] Tucker M C, Kurokawa H, Jacobson C P, et al. A fundamental study of chromium deposition on solid oxide fuel cell cathode materials [J]. Journal of Power Sources, 2006, 160(1): 130-138.
[8] Konysheva E, Penkalla H, Wessel E, et al. Chromium poisoning of perovskite cathodes by the ODS alloy Cr5Fe1Y2O3 and the high chromium ferritic steel Crofer22APU [J]. Journal of the Electrochemical Society, 2006, 153 (4): A765-A773.
[9] Yokokawa H, Horita T, Sakai N, et al. Thermodynamic considerations on Cr poisoning in SOFC cathodes [J]. Solid State Ionics, 2006, 177 (35/36): 3193-3198.
[10] Liu D J, Almer J, Cruse T. Characterization of Cr poisoning in a solid oxide fuel cell cathode using a high energy X-ray microbeam [J]. Journal of the Electrochemical Society, 2010, 157 (5): B744-B750.
[11] Horita T, Xiong Y P, Kishimoto H, et al. Chromium poisoning and degradation at (La,Sr)MnO3 and (La,Sr)FeO3 cathodes for solid oxide fuel cells [J]. Journal of the Electrochemical Society, 2010, 157 (5): B614-B620.
[12] Chiba R, Yoshimura F, Sakurai Y. An investigation of LaNi1-xFexO3 as a cathode material for solid oxide fuel cells [J]. Solid State Ionics, 1999, 124 (3/4): 281-288.
[13] Zhen Y D, Tok A I Y, Jiang S P, et al. La(Ni,Fe)O3 as a cathode material with high tolerance to chromium poisoning for solid oxide fuel cells [J]. Journal of Power Sources, 2007, 170 (1): 61-66.
[14] Jain S R, Adiga K C, Pai Verneker V R. A new approach to thermochemical calculation of condensed fuel-oxidizer mixtures [J]. Combustion and Flame, 1981, 40 (1): 71-79.
[15] LV H, Wu Y J, Huang B, et al. Structure and electrochemical properties of Sm0.5Sr0.5Co1? xFexO3?δ cathodes for solid oxide fuel cells [J]. Solid State Ionics, 2006, 177 (9/10): 901-906.
