Ag-GDC复合电极的性能及其在直接碳SOFC中的应用  

Performance of Ag-GDC Composite Electrode in Direct Carbon Solid Oxide Fuel Cell

作　　者：苑莉莉[1] 蔡位子 张亚鹏[2] 于方永[2] 余亮[1] 刘江[1,2] 

机构地区：[1]华南理工大学化学与化工学院广东省燃料电池技术重点实验室,广东广州510640 [2]华南理工大学环境与能源学院新能源研究所,广东广州510006

出　　处：《中国稀土学报》2015年第6期724-730,共7页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21276097)资助

摘　　要：制备了Ag与Gd掺杂的氧化铈(GDC)复合的电极材料。采用氧化钇稳定的氧化锆(YSZ)为电解质,Ag-GDC为阴极和阳极,组装成固体氧化物燃料电池(SOFC),采用担载5%(质量分数)Fe的活性炭为SOFC的燃料,对此直接碳SOFC(DC-SOFC)的输出性能及阻抗谱进行测试,并与采用传统阴极(掺Sr的锰酸镧与YSZ的复合材料)的DC-SOFC性能进行了比较,发现Ag-GDC具有更好的性能。采用扫描电镜(SEM)对电池的微观结构进行了分析,并就其对电池性能的影响进行了分析。Composite of silver （Ag） and gadolinia （Gd） doped ceria （GDC） was prepared and applied as elec-trodes of a solid oxide fuel cell （ SOFC）, with yttria stabilized zirconia （YSZ） as electrolyte. The SOFC was test-ed, directly using 5% Fe-loaded activated carbon as the fuel （DC-SOFC）. Its electrochemical performance wascompared with that of a similar cell with conventionalcomposite cathode of strontium-doped lanthanum manganiteand YSZ. The results showed that Ag-GDC could be used as both cathode and anode of a DC-SOFC, and the elec-trochemical performance of the cell with Ag-GDC as cathode was better than that with LSM-YSZ. Scanning electronmicroscopy （SEM） was used to characterize the microstructure of the cells. And the factors which affecting theelectrochemical performance of the cells were analyzed

关 键 词：固体氧化物燃料电池 Ag-GDC LSM-YSZ 活性炭 稀土 

分 类 号：TM911.4[电气工程—电力电子与电力传动]