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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >A-site deficient La0.4Sr0.4TiO3-Ce0.9Gd0.1O1.95 composites as efficient and redox stable anodes for solid oxide fuel cells
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A-site deficient La0.4Sr0.4TiO3-Ce0.9Gd0.1O1.95 composites as efficient and redox stable anodes for solid oxide fuel cells

机译：A现场缺陷LA0.4SR0.4TIO3-CE0.9GD0.1O1.95复合材料作为固体氧化物燃料电池的高效和氧化还原稳定阳极

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摘要

La-doped strontium titanates have attracted much interest as promising reliable ceramic anodes for solid oxide fuel cells (SOFCs) owing to their superior redox-stability. Moreover, recent studies demonstrated that A-site deficiency of the La-doped SrTiO3 perovskite could effectively promote conductivity and catalytic activity, simultaneously. In this study, we developed the LST44-Ce0.9Gd0.1O1.95 (GDC) composite anodes, and investigated their electrochemical performance and redox stability on La0.8Sr0.2Ga0.8Mg0.2O3-delta (LSGM) electrolyte-based SOFCs. During galvanostatic long-term stability tests combined with in situ redox cycles, power out-put performance of the LST44-GDC employed SOFC was initially increased by similar to 53% to 0.26 W cm(-2) and maintained the high performance over 350 h at 800 degrees C. Analysis of the accumulated electrochemical impedance spectra during the long-term stability test showed that the electrochemical activity of the LST44-GDC anode was promoted at the initial redox cycling. Consequently, this study demonstrates that A-site deficient LST44-GDC is a promising material as an efficient and redox stable SOFC anode. (C) 2019 Elsevier B.V. All rights reserved.
机译：La掺杂钛酸锶已引起很大的兴趣作为有前途的，由于其优异的氧化还原稳定性的固体氧化物燃料电池（SOFC）可靠陶瓷阳极。此外，最近的研究表明，La掺杂钛酸锶钙钛矿能有效地促进电导率和催化活性，同时的A-位不足。在这项研究中，我们开发了LST44-Ce0.9Gd0.1O1.95（GDC）复合阳极，并研究La0.8Sr0.2Ga0.8Mg0.2O3-Δ（LSGM）的电解质固体氧化物燃料电池的电化学性能和氧化还原稳定性。在恒电流长期稳定性测试原位氧化还原循环相结合时，LST44-GDC的功率出放性能采用SOFC最初增加了类似的53％至0.26厘米w ^（-2）和保持高的性能超过350ħ在800℃的累计电化学阻抗谱分析表明，该LST44-GDC阳极的电化学活性物在所述初始氧化还原循环促进了长期稳定性测试过程中。因此，该研究表明，A位缺陷LST44-GDC是有前途的材料作为一种高效和氧化还原稳定的阳极的SOFC。 （c）2019 Elsevier B.v.保留所有权利。

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