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CN101847725B 一种A缺位型钙钛矿结构固体氧化物燃料电池阴极材料 失效 - 权利终止

一种A缺位型钙钛矿结构固体氧化物燃料电池阴极材料
摘要：
本发明涉及固体氧化物燃料电池阴极材料，具体说是一种A缺位Ba1-z(Co1-x-yFexMy)O3-δ(BCFM，x＝0-0.9，y＝0.1-0.5，z＝0.01-0.3)钙钛矿阴极材料及其应用，M为Zr、V、Nb、Ti、W、Mo、Ta、Hf。本发明的特征在于：对钛矿型BaCo1-xFexO3-δ(BCF)材料在A位引入Ba缺位，B位掺入高价离子，降低钴含量，分子式为：Ba1-z(Co1-x-yFexMy)O3-δ。本发明制备出的多孔、A缺位、B位高价掺杂钙钛矿材料热和化学稳定性好，氧催化活性高，可以有效降低阴极极化。BCFM材料单独或与电解质材料复合构成SOFC阴极。阴极为纳微结构，分两层，外层为大晶粒疏松结构，内层为细晶粒相对致密结构。BCFM阴极可以用作不同结构和组成的SOFC阴极。电池在650-700℃的输出功率在1.0W/cm2左右。
摘要（英）：

The invention relates to a cathode material of a solid oxide fuel cell, in particular to an A omission Ba1-z(Co1-x-yFexMy)O3-delta(BCFM, x=0 to 0.9, y=0.1 to 0.5, and z=0.01 to 0.3) perovskite cathode material and application thereof, wherein M is Zr, V, Nb, Ti, W, Mo, Ta or Hf. The invention is characterized in that the Ba omission in introduced in a site A on titanium ore type BaCo1-xFexO3-delta(BCF) materials, high-valence ions are doped in a site B, the cobalt content is reduced, and the molecular formula is Ba1-z(Co1-x-yFexMy)O3-delta. The porous A omission site B high-valence doping perovskite materials prepared by the invention have the advantages of good thermal and chemical stability and high oxygen catalytic activity, and can effectively reduce the cathodic polarization. The BCFM materials singly form an SOFC cathode or form the SOFC cathode with electrolyte materials through being compounded. The cathode is in a nano-micro structure with two layers, wherein the outer layer is in a large-grain loose structure, and the inner layer is in a fine-grain relatively compact structure. The BCFM cathode can be used as the SOFC cathodes with different structures and compositions. The output power of the cell at 650 to 700 DEG C is about 1.0 W/cm<2>.

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