摘要
通过将40、400nm石墨与NiO-GDC水浴搅拌混合,将400nm石墨与NiO-GDC机械研磨混合制备得到3种阳极孔隙大小及分布不同的NiO-GDC复合阳极片及单电池片.阳极片扫描电子显微镜测试结果表明:在40、400nm石墨与NiO-GDC水浴搅拌混合得到的阳极片中孔隙分布均匀,但前者孔径较小,后者孔径相对较大.而400nm石墨与NiO-GDC机械研磨混合得到的阳极片中可明显观察到尺度达到几十微米的不均匀分布的大孔.阳极电导率及单电池电化学性能测试结果表明:阳极孔隙越小,分布越均匀,则电导率和单电池的电化学性能越好.40nm石墨与NiO-GDC水浴搅拌混合得到的阳极片还原后的电导率最高,其单电池的电化学性能最好,其在600,650和700℃时的最大功率密度分别为0.173,0.310,0.445W·cm-2.
Three kinds of anodes and cells with different pores in anode were prepared via water bath- mixing graphite particles of 40 nm and 400 nm with NiO-GDC anode powders, and via mechanically-mixing graphite of the size of 400 nm with NiO-GDC anode powders. The results of anodes by scanning electron microscopy show that the pores distribute uniformly in anodes fabri- cated via water bath-mixing graphite particles of 40 nm and 400 nm with NiO-GDC anode powders. The pore size of the latter anode is greater than that of the former anode. In anode fabricated via mechanically-mixing graphite particles of 400 nm with NiO-GDC anode powders, some larger pores of several ten microns appear and distribute non-uniformly. The results also indi- cate that the smaller the anode pores are, the more uniformly the anode pores distribute, and the better the electrochemical per- formanee of the anode and its single cell will be. The cell fabricated v/a water bath-mixing graphite particles of 40 nm with NiO-GDC anode powders has the superior electrochemical performance. The maximum power densities of this cell are 0. 173, 0. 310 and 0. 445 W/cm2at 600,650 and 700 ~C, respectively.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2014年第1期56-64,共9页
Journal of The Chinese Ceramic Society
关键词
中温固体氧化物燃料电池
阳极支撑电池
阳极孔隙
电化学性能
阳极
intermediate t^nperature solid oxide fuel cells
anode-supported cell
anode pores
electrochemical performance
anode
