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首页> 外文会议>Fourth International Symposium on Ionic and Mixed Conducting Ceramics, null >La_(0.8)Sr_(0.2)MnO_3-La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_3 Composite Cathodes for Anode Supported Solid Oxide Fuel Cells
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La_(0.8)Sr_(0.2)MnO_3-La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_3 Composite Cathodes for Anode Supported Solid Oxide Fuel Cells

机译：La_（0.8）Sr_（0.2）MnO_3-La_（0.9）Sr_（0.1）Ga_（0.8）Mg_（0.2）O_3用于阳极支撑的固体氧化物燃料电池的复合阴极

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摘要

Anode supported solid oxide fuel cells (SOFC) with tape cast NiO/YSZ anode substrates, thin film YSZ electrolytes, and La_(0.8)Sr_(0.2)MnO_3 (LSM) -La_(0.9)Sr_(0.1)Ga_(0.8)Mg_(0.2)O_3 (LSGM) composite cathodes were fabricated and tested at 800℃ using humidified hydrogen as fuel and air as the oxidant. The composition and processing temperature of the LSGM/LSM composite cathodes were varied and the resulting effects on cell performance were studied. A minimum in the cathodic overpotential was found at a composition of 50 wt % LSGM and 50 wt % LSM and at a firing temperature of 1150℃, with the overpotential increasing at compositions and temperatures above and below 50 wt% and 1150℃, respectively. The optimized composite cathode exhibited a cathodic overpotential of 0.14 V at 3 A/cm~2 at 800℃. The anodic overpotentials and ohmic resistance were similar from cell to cell, while changes in the cathodic overpotential largely dictated the cell performance. The maximum power density for a cell containing the optimized cathode was 1.4 W/cm~2 at a current density of 2.6 A/cm~2 at 800℃.
机译：阳极支撑的固体氧化物燃料电池（SOFC），带铸NiO / YSZ阳极基板，薄膜YSZ电解质和La_（0.8）Sr_（0.2）MnO_3（LSM）-La_（0.9）Sr_（0.1）Ga_（0.8）Mg_制备了（0.2）O_3（LSGM）复合阴极，并以加湿氢气为燃料，空气为氧化剂，在800℃下进行了测试。改变了LSGM / LSM复合阴极的组成和加工温度，并研究了其对电池性能的影响。在50wt％LSGM和50wt％LSM的组成下以及在1150℃的焙烧温度下，发现阴极的超电势最小，当组成和温度分别高于和低于50wt％和1150℃时，超电势增加。优化后的复合阴极在800 A时3 A / cm〜2时的阴极超电势为0.14V。电池之间的阳极过电势和欧姆电阻相似，而阴极过电势的变化在很大程度上决定了电池的性能。在800℃，电流密度为2.6 A / cm〜2时，包含优化阴极的电池的最大功率密度为1.4 W / cm〜2。

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