纳米Ni(OH)_2的制备及其电化学性能  

Preparation and electrochemical performances of nano-sized Ni(OH)_2

作　　者：黄行康[1] 张文魁[1] 马淳安[1] 

机构地区：[1]浙江工业大学应用化学系,杭州310032

出　　处：《中国有色金属学报》2003年第5期1121-1124,共4页The Chinese Journal of Nonferrous Metals

摘　　要：采用固相法制备了纳米 β Ni(OH) 2 ,采用Scherrer公式由其中一样品的 (10 0 )、(10 1)及 (110 )晶面参数计算得到晶粒尺寸分别为 11.1nm、3.6nm和 12 .1nm。采用循环伏安、恒电流充放电等技术对其电化学性能进行了初步研究 ,结果表明 :纳米Ni(OH) 2 的活性比较高 ,其首次容量达 2 0 7.9mA·h·g-1,第 2周期容量即达到最大值 2 4 0 .4mA·h·g-1,但其容量衰退较快。Nano-sized β -Ni(OH)_2 powder was prepared using solid state reaction method, and the particle sizes of (100), (101) and (110) planes were 11.1 nm, 3.6 nm and 12.1 nm respectively, depending on Scherrer equation. By using cyclic voltammagraph and corresponding electrochemical measurements, the electrochemical performances of the electrodes using the nano-sized Ni(OH)_2 samples were studied. The results show that the electrochemical capacity of the electrode exhibits excellent activation properties. The first discharge capacity is 207.9 mA·h/g and the maximum capacity is 240.4 mA·h/g at the second cycle. However, the degradation of capacity is fast.

关 键 词：纳米材料 镍氢电池 正极材料 电化学性能 制备 氢氧化镍 

分 类 号：TM912[电气工程—电力电子与电力传动]