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1. 发明公开

EP1484811A1 SOLID OXIDE FUEL CELL 有权
标题翻译： FESTOXIDBRENNSTOFFZELLE
公开(公告)号：EP1484811A1
公开(公告)日：2004-12-08
申请号：EP03744010.4
申请日：2003-03-07
申请人： Mitsubishi Materials Corporation , The Kansai Electronic Power Co., Inc.
发明人： HOSHINO, Koji, c/o Mitsubishi Materials Corp. , HOSOI, Kei, c/o Mitsubishi Materials Corp. , YAMADA, Takashi, c/o Mitsubishi Materials Corp. , AKIKUSA, Jun, c/o Mitsubishi Materials Corp.
IPC分类号： H01M8/02 , H01M8/12 , H01M4/86
CPC分类号： H01M4/9066 , H01M4/8621 , H01M4/8642 , H01M4/8885 , H01M4/9025 , H01M8/1246 , H01M8/126 , Y02E60/525 , Y02P70/56
摘要： A solid oxide fuel cell provided with a power cell (1) in which a fuel electrode layer (4) is arranged on one surface of a solid electrolyte layer (3) and an air electrode layer (2) is arranged on the other surface thereof, wherein the solid electrolyte layer (3) has a two layer structure including a first electrolyte layer (3a) made of a ceria based oxide material and a second electrolyte layer (3b) made of a lanthanum gallate based oxide material, and the second electrolyte layer is formed on the side of the air electrode layer. It is preferable that the first electrolyte layer is formed thinner than the second electrolyte layer. According to such a configuration, there can be provided a solid oxide fuel cell comprising an inexpensive solid electrolyte layer which reduces the contact resistances in the interfaces between the solid electrolyte layer and the respective electrode layers, and thereby improves the generation efficiency. Additionally, by adopting a configuration in which the composition ratio of component materials in the fuel electrode layer (4) is graded along the thickness thereof, there can be provided a solid oxide fuel cell in which the generation characteristics of the power cell are improved and the durability of the solid oxide fuel cell is improved. Preferably, the material composition for the fuel electrode layer (4) is a mixture of Ni and CeSmO 2 , wherein the composition ratio of component materials is graded along the thickness thereof in such a way that the quantity of Ni is made less than the quantity of CeSmO 2 near the boundary interface with said solid electrolyte layer, and the mixing ratio of Ni is gradually increased with an increasing distance away from the interface.
摘要翻译：一种固体氧化物型燃料电池，其具有设置在固体电解质层（3）的一面上的燃料电极层（4）和空气电极层（2）的动力单元（1）的另一面其特征在于，所述固体电解质层（3）具有包含由氧化铈类氧化物材料构成的第一电解质层（3a）和由无铼酸镧镓系氧化物材料构成的第二电解质层（3b）的二层结构，所述第二电解质层形成在空气电极层的一侧。优选地，第一电解质层形成得比第二电解质层薄。根据这样的结构，可以提供一种固体氧化物型燃料电池，其包含廉价的固体电解质层，其降低了固体电解质层与各电极层的界面的接触电阻，提高了发电效率。另外，通过采用其中燃料电极层（4）中的组分材料的组成比沿其厚度分级的结构，可以提供一种固体氧化物燃料电池，其中功率单元的产生特性得到改善，改善了固体氧化物燃料电池的耐久性。优选地，用于燃料电极层（4）的材料组合物是Ni和CeSmO 2的混合物，其中组分材料的组成比沿其厚度分级，使得Ni的量小于 CeSmO 2在与所述固体电解质层的界面界面附近，并且随着离开界面的距离增加，Ni的混合比逐渐增加。

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