Cell performance of strontium ruthenium oxide cathode/ Gd-doped ceria (GDC) electrolyte/ nickel-GDC anode system
Cell performance of strontium ruthenium oxide cathode/ Gd-doped ceria (GDC) electrolyte/ nickel-GDC anode system
复制标题
氧化锶钌阴极/掺钆氧化铈（GDC）电解质/镍-GDC阳极体系的电池性能
DOI：
10.2109/jcersj2.117.1141
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发表时间：
2009
影响因子：
1.1
通讯作者：
T. Shimonosono
中科院分区：
文献类型：
--
作者：
Y. Hirata;Kenshi Matsumoto;S. Sameshima;N. Matsunaga;M. Nagamori;T. Shimonosono
在773-1073 K下测量了具有SrRuO 3阴极的Ni-GDC（Gd掺杂的二氧化铈）阳极支撑的GDC膜（60 μm厚度）的电池性能，使用含3体积% H2O的H2燃料。减小SrRuO 3阴极颗粒尺寸（< 1 μm）可有效降低阴极压降，这是由于增加了三相边界（GDC电解质-SrRuO 3阴极-O2气体）的长度。GDC电解质在无H2燃料的阳极气氛中的开路电压（OCV）接近于无电子传导时的能斯特方程计算值。然而，在含H2的气氛中的OCV从能斯特方程的值下降，由于在GDC膜中的电子传导增加。对于较薄的GDC膜，OCV的这种降低趋势变得显著。这一结果被解释为H2燃料在GDC膜中溶解和解离形成质子和电子（H2 → 2 H ++2e-）。
Cell performance was measured at 773-1073 K for Ni-GDC(Gd-doped ceria) anode-supported GDC film (60 μm thickness) with SrRuO3 cathode using a 3 vol% H2O-containing H2 fuel. Reduction of particle size (< 1 μm) of SrRuO3 cathode was effective to decrease the voltage drop at the cathode because of the increased length of triple phase boundary (GDC electrolyte-SrRuO3 cathode-O2 gas). Open circuit voltage (OCV) of GDC electrolyte in an anode atmosphere without H2 fuel was close to the value calculated by Nernst equation for no electronic conduction. However, the OCV in a H2-containing atmosphere decreased from the values by Nernst equation owing to the increased electronic conduction in a GDC film. This tendency of decrease in OCV became significant for thinner GDC film. This result was interpreted by the dissolution and dissociation of H2 fuel in a GDC film to form protons and electrons (H2 → 2H+ + 2e-).