包覆Co(OH)_2和CoOOH的球形Ni(OH)_2电极性能研究  

Characteristics of pasted nickel hydroxide electrode using Co(OH)_2- and CoOOH-coated spherical nickel hydroxide powders

作　　者：唐致远[1] 王岩[1] 耿鸣明[2] 许峥嵘[1] 荣强[1] 

机构地区：[1]天津大学化工学院,天津300072 [2]天津和平海湾电源集团有限公司,天津300384

出　　处：《电源技术》2004年第5期273-275,共3页Chinese Journal of Power Sources

基　　金：教育部博士点重点基金(20020056045)

摘　　要：球形Ni(OH)2表面改性可以有效地改善MH-Ni电池的性能。主要研究了球形Ni(OH)2表面包覆Co(OH)2和CoOOH以及它们的电极性能。实验结果证明,包覆Co(OH)2虽然容量比较高,活化快,但振实密度较小。而包覆CoOOH的球形Ni(OH)2不但振实密度高,而且制成的电极具有放电电压高,比容量高,活化次数少等优点。The charge-discharge performance of MH-Ni battery is improved through the surface modification of Ni(OH)2 active material for nickel electrode. Co(OH)2and CoOOH compounds were chemically coated on the surface of spherical Ni(OH)2 . Results show that the capacity utilization of Co(OH)2-coated spherical Ni(OH)2 increases and the tapping density decreases. However, not only the tapping density of the CoOOH-coated Ni(OH)2 does not lower, but also the capacity utilization is improved. The CoOOH-coated Ni(OH)2 powders can supply the superior performance for advanced MH-Ni batteries because of high-rate discharge capability, high capacity utilization, fast activation capability etc.

关 键 词：MH-NI电池 CO(OH)2 COOOH NI(OH)2 电极性能 正极添加剂 电解液 

分 类 号：TM912.2[电气工程—电力电子与电力传动]