中温固体氧化物燃料电池阴极材料Ba1-xSrxCo0.7Fe0.2Nb0.1O3-δ的制备与性能研究

doi:10.3724/SP.J.1077.2013.13131

无机材料学报 ›› 2013, Vol. 28 ›› Issue (11): 1223-1227.DOI: 10.3724/SP.J.1077.2013.13131

中温固体氧化物燃料电池阴极材料Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ的制备与性能研究

韩飞^1,2, 刘晓梅¹, 毕海林¹, 张立军¹, 裴力¹, 苏文辉¹

(1. 吉林大学, 新型电池物理与技术教育部重点实验室, 物理学院,长春130012; 2. 长春师范学院,长春130032)

收稿日期:2013-03-07 修回日期:2013-04-04 出版日期:2013-11-20 网络出版日期:2013-10-18
作者简介:韩飞(1979-), 女, 博士研究生. E-mail:hanhongfei79@163.com
基金资助:
国家自然科学基金(51272087)

Preparation and Performance of Cathode Materials Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ for Intermediate-temperature Solid Oxide Fuel Cells

HAN Fei^1,2, LIU Xiao-Mei¹, BI Hai-lin¹, ZHANG Li-Jun¹, PEI Li¹, SU Wen-Hui¹

(1. Key Laboratory of Physics and Technology for Advanced Batteries, Ministry of Education, Department of Physics, Jilin University, Changchun 130012, China; 2. Changchun Normal University, Changchun 130032, China)

Received:2013-03-07 Revised:2013-04-04 Published:2013-11-20 Online:2013-10-18
About author:HAN Fei. E-mail:hanhongfei79@163.com
Supported by:
National Natural Science Foundation of China (51272087)

摘要/Abstract

摘要： 采用固相法合成Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ(x=0、0.1、0.2、0.3、0.4)阴极材料。利用X射线衍射(XRD)和扫描电子显微镜(SEM)对其结构和微观形貌进行了表征。XRD测试结果表明Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ样品经1000℃, 烧结10 h后形成了立方钙钛矿结构。从样品的电镜照片看出样品具有均匀的孔隙率, 电解质(Ce_0.85Sm_0.15O_1.925)-阴极(Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ)之间的界面结合良好。电化学交流阻抗测试结果表明Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ中掺入Sr可以明显地降低阴极的极化电阻, 随着Sr含量的增多, 阴极的界面极化电阻(RP)先减少后增大, 当Sr的含量x为0.2时R_p 值最小。以Ce_0.85Sm_0.15O_1.925(SDC)电解质为支撑体, Ni_0.9Cu_0.1-SDC为阳极, Ba_0.8Sr_0.2Co_0.7Fe_0.2Nb_0.1O_3-δ为阴极的单电池的最大功率密度在600℃时达到155 mW/cm²。实验结果表明Ba_0.8Sr_0.2Co_0.7Fe_0.2Nb_0.1O_3-δ材料是一种电化学性能较为优良的中温固体氧化物燃料电池阴极材料。

关键词: 固体氧化物燃料电池, 阴极, Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ, 界面极化电阻

Abstract: The Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ(x=0, 0.1, 0.2, 0.3, 0.4) oxides were synthesized by the conventional solid state reaction process and investigated as a cathode for intermediate temperature solid oxide fuel cells (IT-SOFCs). All prepared Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ(x=0-0.4) powders were sintered at 1000 ℃. X-ray diffraction patterns indicate that all samples have a single phase of cubic perovskite structure. The morphologies of the symmetric cell were characterized by a scanning electron microscope (SEM). The cathode exhibits fine uniform microstructure with appropriate porosity, and shows good bonding and continuous contact with the dense Ce_0.85Sm_0.15O_1.925(SDC) electrolyte pellet. AC impedance spectra based on SDC electrolyte measured at intermediate temperatures show that a cathode Ba_0.8Sr_0.2Co_0.7Fe_0.2Nb_0.1O_3-δ exhibits the best electrochemical performance. The maximum power density of single cell with Ba_0.8Sr_0.2Co_0.7Fe_0.2Nb_0.1O_3-δ cathode, Ni_0.9Cu_0.1-SDC anode and SDC electrolyte is 155 mW/cm² at 600℃. The encouraging results suggest that Ba_0.8Sr_0.2Co_0.7Fe_0.2Nb_0.1O_3-δ is a very promising cathode material for IT-SOFCs.

Key words: solid oxide fuel cell, cathode, Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ, interfacial polarization resistance

中图分类号:

TQ174

韩飞, 刘晓梅, 毕海林, 张立军, 裴力, 苏文辉. 中温固体氧化物燃料电池阴极材料Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ的制备与性能研究[J]. 无机材料学报, 2013, 28(11): 1223-1227.

HAN Fei, LIU Xiao-Mei, BI Hai-Lin, ZHANG Li-Jun, PEI Li, SU Wen-Hui. Preparation and Performance of Cathode Materials Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ for Intermediate-temperature Solid Oxide Fuel Cells[J]. Journal of Inorganic Materials, 2013, 28(11): 1223-1227.

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中温固体氧化物燃料电池阴极材料Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ的制备与性能研究

Preparation and Performance of Cathode Materials Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ for Intermediate-temperature Solid Oxide Fuel Cells

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中温固体氧化物燃料电池阴极材料Ba1-xSrxCo0.7Fe0.2Nb0.1O3-δ的制备与性能研究

Preparation and Performance of Cathode Materials Ba1-xSrxCo0.7Fe0.2Nb0.1O3-δ for Intermediate-temperature Solid Oxide Fuel Cells

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中温固体氧化物燃料电池阴极材料Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ的制备与性能研究

Preparation and Performance of Cathode Materials Ba_1-xSr_xCo_0.7Fe_0.2Nb_0.1O_3-δ for Intermediate-temperature Solid Oxide Fuel Cells