首页> 外文期刊>Journal of the American Ceramic Society >Titania-Added Ce_(0.6)La_(0.4)O_(2-δ) for the Buffer Layer of High-Performance Solid Oxide Fuel Cells Using Doped Lanthanum Gallate Electrolyte Film
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Titania-Added Ce_(0.6)La_(0.4)O_(2-δ) for the Buffer Layer of High-Performance Solid Oxide Fuel Cells Using Doped Lanthanum Gallate Electrolyte Film

机译:掺杂镓酸镧电解质薄膜的高性能固体氧化物燃料电池缓冲层的二氧化钛添加Ce_(0.6)La_(0.4)O_(2-δ)

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摘要

Decrease in sintering temperature of lanthanum-doped ceria (Ce_(0.6)La_(0.4)O_(2-δ), LDC), which was used as a buffer layer, was investigated using sintering additives such as Ag_2O, ZnO, BaO, CaO, Bi_2O_3, RuO_2, and TiO_2 for preventing NiO diffusion into Sr- and Mg-doped LaGaO_3 (LSGM) electrolyte film prepared by screen printing and co-firing method. It was found that TiO_2 was the most effective in decreasing the sintering temperature to 1473 K, which was 300 K lower than that of LDC, and increasing the electrical conductivity. Ti addition in LDC was attributed to increased mass transportation caused by compensation for lattice mismatch and defect dissociation resulted in improved sintering density and electrical conductivity. However, Ti-LDC buffer layer could not completely pre-vent NiO diffusion into the LSGM electrolyte, although it was effective in reducing the diffusion content-probably because of the low sintering temperature of Ti-LDC. The use of fast sintering (a heating/cooling rate of 600 K/h and a holding time of 3 h) further decreased NiO diffusion into the electrolyte. Accordingly, theoretical open-circuit voltage and improved power density were attributed to reduced electron hole conduction and ohmic resistance that were assigned to suppressed NiO diffusion into the LSGM electrolyte.
机译:使用Ag_2O,ZnO,BaO,CaO等烧结添加剂研究了用作缓冲层的掺镧二氧化铈(Ce_(0.6)La_(0.4)O_(2-δ),LDC)的烧结温度降低,Bi_2O_3,RuO_2和TiO_2用于防止NiO扩散到通过丝网印刷和共烧方法制备的Sr和Mg掺杂的LaGaO_3(LSGM)电解质膜中。结果表明,TiO_2最有效地降低烧结温度至1473 K(比LDC低300 K)并提高电导率。 LDC中添加Ti的原因是由于晶格失配的补偿导致质量传输增加,缺陷解离导致烧结密度和电导率提高。但是,Ti-LDC缓冲层可能完全由于Ti-LDC的烧结温度低而有效地降低了扩散含量,但不能完全防止NiO向LSGM电解质中的扩散。快速烧结(加热/冷却速度为600 K / h,保持时间为3 h)的使用进一步减少了NiO扩散到电解质中的可能性。因此,理论上的开路电压和功率密度的提高归因于减少的电子空穴传导和欧姆电阻,这归因于抑制了NiO向LSGM电解质的扩散。

著录项

  • 来源
    《Journal of the American Ceramic Society》 |2012年第11期|3588-3596|共9页
  • 作者单位

    Department of Automotive Science, Graduate School of Integrated Frontier Sciences, Kyushu University, Motooka 744, Nishi-Ku, Fukuoka 819-0395, Japan,Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-Ku, Fukuoka 819-0395, Japan;

    The Kansai Electric Power Co., Inc., 11-20 Nakoji 3-chome, Amagasaki, Hyogo 661-0974, Japan;

    Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-Ku, Fukuoka 819-0395, Japan;

    Department of Automotive Science, Graduate School of Integrated Frontier Sciences, Kyushu University, Motooka 744, Nishi-Ku, Fukuoka 819-0395, Japan,Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Motooka 744, Nishi-Ku, Fukuoka 819-0395, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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  • 入库时间 2022-08-17 13:38:53

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