文化大學機構典藏 CCUR:Item 987654321/41832
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    jsp.display-item.identifier=請使用永久網址來引用或連結此文件: https://irlib.pccu.edu.tw/handle/987654321/41832


    题名: Fabrication and characterization of Ca2+, Sr2+, Ba2+, Sm3+, and La3+ co-doped ceria-based electrolyte powders for low-temperature anode-supported solid oxide fuel cells
    作者: Wu, YC (Wu, Yu-Chuan)
    Chen, WY (Chen, Wan-Yu)
    贡献者: 化學工程與材料工程學系暨奈米材料研究所
    关键词: ELECTRICAL-PROPERTIES
    IT-SOFC
    PERFORMANCE
    MICROSTRUCTURE
    SYSTEM
    Y3+
    CEO2
    CONDUCTIVITY
    ND3+
    日期: 2018-09-27
    上传时间: 2019-01-16 14:47:42 (UTC+8)
    摘要: In this study, CeO2-based electrolytes are synthesized by a sol-gel method. Ce0.8Sm0.2O1.9, Ce0.8Sm0.15Ca0.05O1.875, Ce0.8Sm0.15Ca0.025Sr0.025O1.875 (S15CS05DC), Ce0.8Sm0.15La0.05O1.9, (La0.77Sr0.2Ba0.03)(0.15)Ce0.85O1.908, and (La0.77Sr0.2Ba0.03)(0.2)Ce0.8O1.877 specimens are prepared at sintering temperature 1300 degrees C for either 2 h or 4 h. The microstructures and electrical properties of the electrolytes are analyzed using X-ray diffraction, scanning electron microscopy, and alternating current (AC) impedance spectroscopy. All samples are cubic fluorite structure. It is found that while Ca2+ and Sr2+ contribute to grain growth, Sm3+ and La2+ inhibit it. The conductivity increases with temperature in a linear manner and reaches approximately 0.16 S.cm(-1) at 800 degrees C for the 4 h-sintered S15CS05DC sample. Six anode-supported cells are fabricated and tested at 600 degrees C-800 degrees C. Cell-C has the highest maximum power density (0.96 W.cm(-2)) at 800 degrees C. It is also found that ohmic resistance predominantly determines the total cell resistance at temperatures above 700 degrees C. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
    显示于类别:[化學工程與材料工程學系暨碩士班] 期刊論文

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