钙钛矿型双功能氧电极在MH-空气蓄电池中的应用  

Novel secondary air-MH batteries using perovskite bi-functional oxygen electrodes

作　　者：宋世栋[1] 唐致远[1] 潘丽珠[1] 南俊民[2] 

机构地区：[1]天津大学化工学院应用化学系,天津300072 [2]华南师范大学化学系,广东广州510631

出　　处：《电源技术》2005年第6期380-384,398,共6页Chinese Journal of Power Sources

基　　金：国家自然科学基金(20020056045)资助项目

摘　　要：从LaNiO3的B位掺杂出发,采用溶胶-凝胶法制备了一系列掺杂Co和Fe离子的高催化活性的LaNi1-y-Co(Fe)yO3型钙钛矿电催化剂,并进一步研究了催化剂对于氧还原反应和氧析出反应的电催化性能,筛选出最佳催化活性的催化剂。将LaNi0.8Fe0.2O3和LaNi0.8Co0.2O3催化剂制备的双功能氧电极初步应用于MH-空气蓄电池。结果表明:使用较高催化活性的LaNi0.8Co0.2O3为氧电极催化剂的电池性能比使用LaNi0.8Fe0.2O3为催化剂的电池高,但是电池放电容量的衰减比LaNi0.8Fe0.2O3为催化剂的电池大,这是由于钙钛矿催化剂晶格内的Co离子不如Fe离子稳定造成的。两种催化剂制备的双功能氧电极都在152h的充放电循环时间内保持了比较好的工作状态。A series of novel perovskite catalysts were prepared by doping Co and Fe ions on B site of LaNiO3 via sol-gel method. By examining the electrochemical properties of the electric catalysts, the LaNi0.8Fe0.2O3 and LaNi0.8Co0.2O3 catalysts showed the best performance. They were applied in novel air-metal hydride batteries innovatively. The results show that the discharge performance of the battery used LaNi0.8Co0.2O3 is better than that used LaNi0.8Fe0.2O3,however the discharge capacity fading is opposite because the Co ion is not more stable than Fe ion in perovskite crystal lattice.The two batteries using the LaNi0.8Fe0.2O3 and LaNi0.8Co0.2O3 catalysts showed good performance within 152 hours charge and discharge cycles.

关 键 词：双功能氧电极 MH-空气蓄电池 钙钛矿复合氧化物 金属-空气蓄电池 可再生燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]