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新型双钙钛矿基对称固体氧化物燃料电池的制备及性能
作者:陈永红1  洋1 2  雪1  冬1 卢肖永1 丁岩芝1  彬1 2 
单位:1. 低温共烧材料安徽省重点实验室 淮南燃料电池材料工程技术研究中心 淮南师范学院 安徽 淮南 232001  2. 电子科技大学 能源科学与工程学院 成都 611731 
关键词:对称固体氧化物燃料电池 双钙钛矿 复合电极 
分类号:TM911.47
出版年,卷(期):页码:2017,45(11):0-0
DOI:
摘要:

 采用柠檬酸-硝酸盐燃烧法制备PrBaFe2O5+δ(PBFO)和PrBaFe1.6Ni0.4O5+δ(PBFNO)电极材料,用高温固相法制备La0.9Sr0.1Ga0.8Mg0.2O3–δ(LSGM)电解质。以LSGM 为电解质,PBFNO 及PBFNO-SDC 分别为对称电极构建单电池。利用X 射线衍射法研究材料的物相结构,交流阻抗法记录界面极化行为,扫描电子显微镜观察电池的断面微结构,用自组装的测试系统评价电池输出性能。结果表明:合成的PBFO 和PBFNO 粉体呈现单一的钙钛矿结构;Ni 掺杂能够明显改善空气气氛下的界面极化行为,800 ℃时电极|电解质的界面极化阻抗由1.94 Ω·cm2 降低到了0.39 Ω·cm2。通过PBFNO 与SDC 复合能够明显增大电极的三相反应界面,提高电池输出性能,单电池在800 ℃时的最大功率输出密度从332 mW/cm2 增大到372 mW/cm2。PBFNO-SDC 复合电极是潜在的对称固体氧化物燃料电池电极材料。

 PrBaFe2O5+δ (PBFO) and PrBaFe1.6Ni0.4O5+δ (PBFNO) electrode materials were synthesized by a citric acid-nitrates self-propagating combustion method, and La0.9Sr0.1Ga0.8Mg0.2O3-δ (LSGM) electrolyte was prepared by a conventional solid-state reaction method. The LSGM-supported symmetrical solid oxide fuel cells using PBFNO and PBFNO-SDC as electrodes were prepared. The phase structure, polarization resistance, cross-section microstructure and the cell performance were investigated by X-ray diffraction, electrochemical impedance spectroscopy, scanning electron microscopy and self-assembly SOFC test system, respectively. The results indicate that PBFO and PBFNO powders calcined at 1 000 ℃ for 3 h both exhibit a single perovskite structure with cubic symmetry. The polarization performance is enhanced dramatically by Ni doping in air, which decreases from 1.94 Ω·cm2 to 0.39 Ω·cm2 at 800 ℃. The maximum power density of cells increases from 332 mW/cm2 to 372 mW/cm2 due to the enlarged triple-phase boundary by the introduction of SDC, indicating that PBFNO-SDC is a promising electrode material for symmetrical solid oxide fuel cells.

基金项目:
国家自然科学基金项目(No. 51102107),安徽高校自然科学研究项目(KJ2017A459)。
作者简介:
陈永红(1962—),男,教授。
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