中温固体氧化物燃料电池阴极材料SrCo1-xGaxO3-δ的制备及性能研究

doi:10.3724/SP.J.1077.2013.12546

无机材料学报 ›› 2013, Vol. 28 ›› Issue (7): 713-719.DOI: 10.3724/SP.J.1077.2013.12546 CSTR: 32189.14.SP.J.1077.2013.12546

中温固体氧化物燃料电池阴极材料SrCo_1-xGa_xO_3-δ的制备及性能研究

熊明文, 尹屹梅, 原鲜霞, 马紫峰

(上海交通大学化学化工学院, 上海 200240)

收稿日期:2012-09-12 修回日期:2012-10-19 出版日期:2013-07-20 网络出版日期:2013-06-19
作者简介:熊明文(1975–), 男, 博士研究生. E-mail: xiongmingwen@sjtu.edu.cn
基金资助:
国家自然科学基金(21173147、21176155); 上海市重点基础研究项目(10JC1406900)

Preparation and Performance of SrCo_1-xGa_xO_3-δ Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells

XIONG Ming-Wen, YIN Yi-Mei, YUAN Xian-Xia, MA Zi-Feng

(School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China)

Received:2012-09-12 Revised:2012-10-19 Published:2013-07-20 Online:2013-06-19
About author:XIONG Ming-Wen. E-mail: xiongmingwen@sjtu.edu.cn
Supported by:
National Natural Foundation of China (21173147, 21176155); Science and Technology Commission of Shanghai Municipality (10JC1406900)

摘要/Abstract

摘要： 采用EDTA-柠檬酸联合络合法制备了SrCo_1-xGa_xO_3-δ (x=0、0.1、0.2、0.3、0.4)系列阴极材料。通过 X 射线衍射、热膨胀测试、X 射线光电子能谱和电化学阻抗谱等方法对试样进行分析, 研究了Ga掺杂量对材料性能的影响。结果表明试样均为钙铁矿结构, 随着 Ga 含量的增加, 阴极粉体材料热膨胀系数、电导率和阴极材料表面的吸附氧逐渐减小。其中, SrCo_0.8Ga_0.2O_3-δ的面电阻最小, 600℃时为 0.73 Ω•cm², 以其为阴极的单电池在650℃的工作温度下的最大输出功率达 0.484 W/cm²。

关键词: 中温固体氧化物燃料电池, 阴极材料, SrCo1-xGaxO3-δ, 微观结构, 电化学性能

Abstract: Cathode materials of SrCo_1-xGa_xO3-δ (x=0, 0.1, 0.2, 0.3, 0.4) for intermediate temperature solid oxide fuel cells (IT-SOFC) were synthesized by an Ethylene Diamine Tetraacetie Acid (EDTA)-citrate complexing method. The obtained samples were characterized by X-ray diffraction, thermal expansion measurement, X-ray photoelectron spectroscopy and electrochemical impedance spectroscopy, and the effects of Ga-doping on performance and properties of materials were evaluated. The results show that all the samples have brownmillerite structure. The thermal expansion coefficient (TEC), electrical conductivity and the amount of adsorbed oxygen on the surface of the cathode materials gradually decrease with Ga content increasing. Among the as-abtained samples, SrCo_0.8Ga_0.2O_3-δ shows the lowest area specific resistance (ASR) of 0.73 Ω•cm²at 600℃, the single-cell with it as cathode demonstrates a maximum power density of 0.484 W/cm² at 650℃.

Key words: intermediate temperature solid oxide fuel cells (IT-SOFC), cathode materials, SrCo_1-xGa_xO_3-δ, microstructure, electrochemical properties

中图分类号:

TM911

熊明文, 尹屹梅, 原鲜霞, 马紫峰. 中温固体氧化物燃料电池阴极材料SrCo_1-xGa_xO_3-δ的制备及性能研究[J]. 无机材料学报, 2013, 28(7): 713-719.

XIONG Ming-Wen, YIN Yi-Mei, YUAN Xian-Xia, MA Zi-Feng. Preparation and Performance of SrCo_1-xGa_xO_3-δ Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells[J]. Journal of Inorganic Materials, 2013, 28(7): 713-719.

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中温固体氧化物燃料电池阴极材料SrCo_1-xGa_xO_3-δ的制备及性能研究

Preparation and Performance of SrCo_1-xGa_xO_3-δ Cathode Materials 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SrCo1-xGaxO3-δ的制备及性能研究

Preparation and Performance of SrCo1-xGaxO3-δ Cathode Materials 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SrCo_1-xGa_xO_3-δ的制备及性能研究

Preparation and Performance of SrCo_1-xGa_xO_3-δ Cathode Materials for Intermediate Temperature Solid Oxide Fuel Cells