Ni0.75Co0.25/(Gd2O3–CeO2) Anodes for Solid Oxide Fuel Cells
Ni0.75Co0.25/(Gd2O3–CeO2) Anodes for Solid Oxide Fuel Cells
复制标题
固体氧化物燃料电池用 Ni0.75Co0.25/(Gd2O3–CeO2) 阳极
DOI：
10.4028/www.scientific.net/kem.545.115
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Wattanasiriwech
中科院分区：
文献类型：
--
作者：
J. Ayawanna;Kazunori Sato;D. Wattanasiriwech;S. Wattanasiriwech
研究并比较了Ni0.75Co0.25-GDC(Gd0.1Ce0.9O1.95)和Ni-GDC两种固体氧化物燃料电池的电化学性能，以了解(I)Ni与Co合金化和(Ii)阳极微观结构对氢燃料电池性能的影响。在1300℃焙烧5h时，Ni0.75Co0.25-GDC阳极的颗粒分布和连接优于Ni-GDC阳极，总体上呈颗粒状结构。当烧结温度提高到1350℃，3h时，两种阳极中都出现了晶粒长大和连接现象，这使得Ni-GDC阳极的阳极极化电阻显著提高，而Ni0.75Co0.25-GDC阳极的极化电阻变化不大。然而，研究表明，Ni-GDC阳极比Ni0.75Co0.25-GDC阳极具有更高的阳极极化电阻，从而在所有烧结条件下都有更好的电池功率密度。采用Ni0.75Co0.25-GDC阳极的电池在800℃时的最大功率密度为118 mW·cm-2。交流阻抗谱分析表明，在800℃下，随着操作时间延长至10h，两种电池的总电阻逐渐增大，而扫描电子显微镜观察不到微观结构的变化。因此，快速降解的原因需要进一步调查。
Electrochemical performance of solid oxide fuel cells based on Ni0.75Co0.25-GDC (Gd0.1Ce0.9O1.95) and Ni-GDC anodes were investigated and compared in order to understand the effects of (i) alloying Ni with Co and (ii) anode microstructure on the cell performance under hydrogen fuel. At the sintering temperature of 1300°C for 5 h, the Ni0.75Co0.25-GDC anode showed a superior distribution and connection of grains to the Ni-GDC anode which had grain clustering structure in general. Grain growth and connection were found in both anodes when the sintering temperature was increased to 1350°C for 3 h. This resulted in significant improvement of the anodic polarization resistance for the Ni-GDC anode but only minor change for the Ni0.75Co0.25-GDC anode. This research, however, showed that the Ni-GDC anode had higher anodic polarization resistance than the Ni0.75Co0.25-GDC anode, resulting in the better cell power density at all sintering conditions. The maximum power density obtained at 800°C for the cell with the Ni0.75Co0.25-GDC anode was 118 mW•cm-2. Impedance spectroscopy analysis showed that the total cell resistance of both cell types became progressively larger when the operation time was prolonged to 10 h at 800°C, while the microstructure change was not observable by the SEM. The reason for the fast degradation will thus require further investigation.
镍颗粒在YSZ和TiO_2掺杂YSZ电解质上的团聚行为
影响因子：
9.2
作者：
H.Kishimoto;A.Suzuki;T.Shimonosonoa;M.E.Brito;K.Yamaji;T.Horita;F.Munakata;H.Yokokawa
通讯作者：
H.Yokokawa