掺杂LaNiO_3型双功能氧电极的电化学性能  

Study on electrochemical properties of doped LaNiO_3 perovskite bifunctional oxygen electrodes

作　　者：宋世栋[1] 唐致远[1] 刘建华[1] 于瑞林[1] 潘丽珠[1] 

机构地区：[1]天津大学化工学院应用化学系,天津300072

出　　处：《电源技术》2003年第B05期154-156,共3页Chinese Journal of Power Sources

摘　　要：双功能氧电极由于在再生燃料电池和可充金属 空气电池中具有重要应用,因此是人们的研究热点。LaNiO3是钙钛型复合氧化物中唯一的金属型化合物,A位掺杂会造成晶格上有序化的氧空位增多,使电极性能下降,所以对于LaNiO3的掺杂改性研究很少。我们采用溶胶 凝胶法制备了一系列LaNi1-yCoyO3(y=0.0～1.0)型的B位掺杂的LaNiO3钙钛矿催化剂,并以活性炭为载体制备双功能氧电极。对催化剂进行了XRD结构分析,结果表明均为钙钛矿单相。采用三电极体系测试了氧电极的阴极极化和阳极极化的稳态极化曲线和循环伏安曲线。结果表明,B位掺杂可显著提高LaNiO3催化剂的电催化性能,其中LaNi0.8Co0.2O3的双功能电催化活性最好。A series of LaNi1-yCoyO3(y=0.0-1.0) perovskite catalysts used as the catalysts of bifunctional oxygen electrodes were prepared by solgel method. The samples were characterized by XRD. Their electrocatalytic activity at oxygen electrodes were investigated by steady polarization curves and cyclic voltammetry method. The results show that the electrocatalystic properties of LaNiO3 is improved by doping the B ions and the LaNi0.8Co0.2O3 used as electrocatalyst of bifunctional oxygen electrode has excellent catalytic activity and stability on both oxygen reduction reaction and oxygen evolution reactions.

关 键 词：双功能氧电极 电化学性能 燃料电池 金属-空气电池 掺杂 LANIO3 

分 类 号：TM911.41[电气工程—电力电子与电力传动]