中温SOFC阴极材料La0.7Sr0.3Co1-xCuxO3-δ的制备及性能

中温SOFC阴极材料La_0.7Sr_0.3Co_1-xCu_xO_3-δ的制备及性能

荆波^1,2,3,吕喆²,许大鹏¹,苏文辉^1,2

（1.吉林大学物理学院，长春130021；2.哈尔滨工业大学凝聚态科学与技术研究中心，哈尔滨150001；3.大连海事大学物理系，辽宁省大连116026）

收稿日期:2004-10-15 修回日期:1900-01-01 出版日期:2005-09-26 发布日期:2005-09-26
通讯作者: 苏文辉

Preparation and Performance of Cathode Materials of La_0.7Sr_0.3Co_1-xCu_xO_3-δ for IT-SOFC

JING Bo^1,2,3,LüZhe²,XU Da-peng¹,SU Wen-hui^1,2

（1.College of Physics，Jilin University，Changchun130021，China；2.Center for the Condensed Matter Science and Technology，Harbin Institute of Technology，Harbin 150001，China；3.Department of Physics，Dalian Maritime University，Dalian 116026，Liaoning Province，China）

Received:2004-10-15 Revised:1900-01-01 Online:2005-09-26 Published:2005-09-26
Contact: SU Wen-hui

摘要/Abstract

摘要： 采用固相反应法制备了La_0.7Sr_0.3Co_1-xCu_xO_3-δ系列中温固体氧化物燃料电池（SOFC）阴极材料粉体.对其进行晶体结构表征，高温电导率和热膨胀曲线测试，并选取其中性能较好的样品进行了单电池实验.结果表明，Cu的掺杂降低了（La，Sr）CoO La₃体系阴极材料的热膨胀系数，在x=0.05时电导率略高于未掺Cu的样品.以La_0.7Sr_0.3Co_0.95Cu _0.05O _3-δ为阴极、Ce_0.8Sm_0.2O_1.9为电解质组成的SOFC单电池，在850℃最大短路电流密度达511mA/cm²，最大输出功率密度约为0.106W/cm².

关键词: 中温固体氧化物燃料电池, 阴极材料, La_0.7Sr_0.3Co_1-xCu_xO_3-δ

Abstract: The powders of cathode material La_0.7Sr_0.3Co_1-xCu_xO_3-δ for intermediate temperature solid oxide fuel cell（IT-SOFC）were prepared with the solid reaction method.The crystal structure，high temperature conductivity and thermal expansion curve of these samples were characteristiced and a selected sample was tested in the single cell.The results show that the thermal expansion coefficients of （La，Sr）CoO₃ are decreased by Cu doping，while the conductivity at x= 0.05 is higher than that of the one without Cu.A single fuel cell with La_0.7Sr_0.3Co_0.95Cu _0.05O _3-δ as the cathode and Ce_0.8Sm_0.2O_1.9 as the electrolyte was tested，the maximum current density was 511mA/cm²，and the maximum power density was 0.106W/cm² at 850℃.

Key words: intermediate temperature solid oxide fuel cell, cathode material, La_0.7Sr_0.3Co_1-xCu_xO_3-δ

中图分类号:

TM911.4

荆波,吕喆,许大鹏,苏文辉. 中温SOFC阴极材料La_0.7Sr_0.3Co_1-xCu_xO_3-δ的制备及性能[J]. J4, 2005, 43(05): 650-653.

JING Bo,LüZhe,XU Da-peng,SU Wen-hui. Preparation and Performance of Cathode Materials of La_0.7Sr_0.3Co_1-xCu_xO_3-δ for IT-SOFC[J]. J4, 2005, 43(05): 650-653.

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