硅酸盐学报

YSZ修饰的花瓣状氧化镍粉体的制备及其电性能表征

作者：曹倩罗凌虹吴也凡程亮石纪军黄祖志孙良良

分类号：TQ174

出版年,卷(期):页码：2014,42(10):1309-1315

DOI：10.7521/j.issn.0454－5648.2014.10.16

摘要：

采用均匀沉淀法制备了花瓣状NiO粉体，对该花瓣状NiO进行YSZ(Y2O3稳定的ZrO2)修饰，以提高花瓣状NiO粉体的耐高温性，进而构建纳微结构的阳极。采用离子浸渍法制备了YSZ修饰的花瓣状NiO粉体(NiO－YSZ粉体)，通过热重－差热分析、X射线衍射、扫描电子显微镜、能谱仪、透射电子显微镜等分析手段对该粉体的热性能、物相、微观形貌、晶粒大小等进行了表征。分别采用商业NiO(颗粒状)粉体和自制花瓣状NiO－YSZ粉体制备了电解质支撑型单电池的阳极，该单电池的组成为NiO＋8YSZ‖8YSZ‖LSM＋8YSZ，并测试了其电化学性能。结果表明：采用花瓣状NiO－YSZ粉体制备的阳极单电池在操作温度为在750、800和850℃下最大功率密度分别为0.094、0.151和0.376W/cm2，且相对应的电极极化阻抗分别为2.496、1.589和0.814Ω•cm2；而采用商业NiO制备的阳极的单电池在操作温度为在750、800和850℃下的最大功率密度分别为0.024、0.072和0.149W/cm2，且相对应的电极极化阻抗分别为4.265、2.306和1.688Ω•cm2。

The flower－like NiO powder was prepared by a homogeneous precipitation method, and then the powder was modified by yttria－stabilized zirconia(YSZ) to improve its high temperature resistance.The flower－like NiO powders modified by YSZ(i.e., NiO－YSZ powder)was fabricated via an ion impregnation method. The phase, microstructure and grain size and of the powder were characterized by thermogravimetry and differential thermal analysis, X－ray diffraction, scanning electron microscope, energy dispersive spectrometry and transmission electron microscopy, respectively. The two kinds of electrolyte－supported single cells were prepared with commercial and granular NiO powders and the flower－like NiO－YSZ powder as anodes, respectively. The composition of the single cells prepared with the flower－like NiO－YSZ powder is NiO+8YSZ‖8YSZ‖LSM+8YSZ. The electrochemical performance of the single cells was examined by electrochemical workstation. The results show that the maximum power density of the single cell prepared with the flower－like NiO－YSZ power as anode is 0.94, 0.151 and 0.376W/cm2 at 750, 800 and 850℃, respectively, and the corresponding polarization resistance is 2.496, 1.589 and 0.814Ω•cm2, respectively. The maximum power density of the single cell prepared with commercial NiO power as anode is 0.024, 0.072 and 0.149W/cm2 at 750, 800 and 850℃, respectively, and the corresponding polarization resistance is 4.265, 2.306 and 1.688Ω•cm2, respectively.

基金项目：

基金项目：国家自然科学基金项目(51162014)；江西省自然科学基金(20122BAB206010，20122BAB206009)项目；江西省主要学科学术和技术带头人培养计划项目(20133BCB22009)。

作者简介：

第一作者：曹　倩(1986—)，女，硕士研究生。通信作者：罗凌虹(1966—)，女，博士，教授。

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