中温固体氧化物燃料电池复合阴极材料的性能(英文)  

Performance of LSCF-CDC Composite Cathode Materials for IT-SOFC

作　　者：陈秀华[1] 张徐民[1] 林航昇[2] 于洁[2] 马文会[2] 

机构地区：[1]云南大学物理科学技术学院材料科学与工程系,云南昆明650091 [2]昆明理工大学真空冶金国家工程实验室,云南昆明650093

出　　处：《中山大学学报（自然科学版）》2009年第S2期8-10,共3页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(50204007);教育部新世纪优秀人才支持计划基金资助项目(NCET-07-0387)

摘　　要：利用甘氨酸法合成复合材料La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)-Ce_(0.8)Ca_(0.2)O_(1.9),该材料作为中温固体氧化物燃料电池的阴极材料被研究,XRD、SEM-EDS、O_2-TPD等被用于检测材料的各种性能。得到优化的合成温度是1100℃,在该温度条件下晶粒的平均粒径为400nm,而且所合成的样品的元素比与所设计的化学计量比吻合。LSCF70-CDC的电导率在700℃温度下最高。氧的解吸结果表明结构中存在着几种不同类型的氧。Composite materials La_(0.6)Sr_(0.4)Co_(0.2)Fe_(0.8)O_(3-δ)-Ce_(0.8)Ca_(0.2)O_(1.9)(LSCF-CDC) were prepared by glycine nitrate process (GNP) and researched as cathode for intermediate temperature SOFC(IT-SOFC).Performance of the materials are measured via different methods coming from X-ray powder diffraction(XRD),scanning electron microscopy and energy dispersive X-ray spectroscopy (SEM-EDS),temperature programmed oxygen desorption curves(O_2-TPD).The optimum sintering temperature is 1 100℃.The average grain size is about 400 nm at 1100℃and the ratio of elements is in accord with the needed stoichiometry.The electrical conductivity of LSCF70-CDC(the mole ratio of LSCF and CDC with 7:3 ) is the highest at about 700℃.The oxygen desorption result suggests that there are several types of oxygen in the structure.

关 键 词：LSCF-CDC 复合阴极 电导率 中温固体氧化物燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]