La0.6Sr0.4Co0.2Fe0.8O3-δ基固体氧化物电解池复合阳极的制备及性能

doi:10.3724/SP.J.1077.2011.01049

无机材料学报 ›› 2011, Vol. 26 ›› Issue (10): 1049-1052.DOI: 10.3724/SP.J.1077.2011.01049

La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ基固体氧化物电解池复合阳极的制备及性能

孔江榕^1,2, 周涛¹, 刘鹏³, 张勇², 徐景明²

(1. 中南大学化学化工学院, 长沙 410083; 2. 清华大学核能与新能源技术研究院, 北京 100084; 3. 长沙理工大学物理与电子科学学院, 长沙 410114)

收稿日期:2010-12-15 修回日期:2011-02-09 出版日期:2011-10-20 网络出版日期:2011-09-20
基金资助:
国家科技重大专项(2010ZX06901-020); 湖南省教育厅项目(10C0350)

Preparation and Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ-based Composite Anode for Solid Oxide Electrolysis Cell

KONG Jiang-Rong^1,2, ZHOU Tao¹, LIU Peng³, ZHANG Yong², XU Jing-Ming²

(1. College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; 3. School of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410114, China)

Received:2010-12-15 Revised:2011-02-09 Published:2011-10-20 Online:2011-09-20
Supported by:
National Science and Technology Major Project (2010ZX06901-020); Program from Education Department of Hunan Province (10C0350)

摘要/Abstract

摘要： 采用丝网印刷工艺制备了带有SDC阻挡层的固体氧化物电解池La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ(LSCF)基复合阳极, 利用动电位扫描及电化学阻抗谱分析考察了该材料在800℃时的电化学性能, 电化学阻抗谱的研究表明, O^2-在电极发生氧化反应生成O₂的反应速率由电极/阻挡层界面的电荷转移、阻挡层/电解质界面的电荷转移以及氧气的解离吸附或在电极表面的扩散等三个电极过程控制. 扫描电镜分析表明, 经过长时间的电化学测试及升降温, 阻挡层与电解质及复合电极部分均结合紧密, 无缺陷. 通过与传统的LSM-YSZ复合阳极的极化性能的对比, 显示出LSCF材料在SOEC阳极领域良好的应用前景.

关键词: 固体氧化物电解池, 复合阳极, 丝网印刷, 电化学性能

Abstract: La_0.6Sr_0.4Co_0.2Fe_0.8O_3-_δ (LSCF) based composite anode with SDC interlayer for solid oxide electrolysis cell was prepared by screen printing technique. Electrochemical performance of the electrode at 800℃ was examined by linear sweep voltammetry (LSV) and electrochemical impedance spectroscopy (EIS) methods. The result of EIS analysis suggestes that the oxidation kinetics of O^2- to O₂ is controlled by three electrode procedures, including charge transfer at the electrode/interlayer interface, charge transfer at the interlayer/electrolyte interface and oxygen desorption/diffusion. Scanning electron microscope analysis shows that composite anode layer, SDC interlayer and the electrolyte are integrated and well-combined. In terms of anode polarization, LSCF based material exhibites a better application perspective rather than traditional LSM-YSZ composite material for SOEC anode.

Key words: solid oxide electrolysis cell, composite anode, screen printing, electrochemical performance

中图分类号:

TQ174

孔江榕, 周涛, 刘鹏, 张勇, 徐景明. La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ基固体氧化物电解池复合阳极的制备及性能[J]. 无机材料学报, 2011, 26(10): 1049-1052.

KONG Jiang-Rong, ZHOU Tao, LIU Peng, ZHANG Yong, XU Jing-Ming. Preparation and Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ-based Composite Anode for Solid Oxide Electrolysis Cell[J]. Journal of Inorganic Materials, 2011, 26(10): 1049-1052.

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La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ基固体氧化物电解池复合阳极的制备及性能

Preparation and Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ-based Composite Anode for Solid Oxide Electrolysis Cell

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La0.6Sr0.4Co0.2Fe0.8O3-δ基固体氧化物电解池复合阳极的制备及性能

Preparation and Characterization of La0.6Sr0.4Co0.2Fe0.8O3-δ-based Composite Anode for Solid Oxide Electrolysis Cell

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La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ基固体氧化物电解池复合阳极的制备及性能

Preparation and Characterization of La_0.6Sr_0.4Co_0.2Fe_0.8O_3-δ-based Composite Anode for Solid Oxide Electrolysis Cell