不同镍盐合成的球形β-Ni(OH)_2结构变化规律——充放电过程中的特性  

Law of structural changes of spherical β-Ni(OH)_2 prepared from different nickel salt── Properties during charge/discharge process

作　　者：杨书廷[1] 尹艳红[1] 张明春[1] 丁立[1] 

机构地区：[1]河南师范大学化学与环境科学学院,河南新乡453002

出　　处：《电源技术》2001年第4期286-288,共3页Chinese Journal of Power Sources

基　　金：国家自然科学基金资助项目 (2 9981 0 0 2 )

摘　　要：采用均匀络合共沉淀法 ,利用不同的镍盐合成出了球形 β Ni(OH ) 2 ,并首次研究了不同镍盐合成出的球形β Ni(OH) 2 电化学性能的差异及存在这些差异的原因。通过对其充放电特性及循环伏安特性的研究 ,发现由不同镍盐合成的Ni(OH) 2 其电化学性能有较大差别 ,用NiSO4 制得的Ni(OH) 2 放电比容量较高 ,循环寿命较好 ,平台电位也高于用Ni(NO3 ) 2 合成的Ni(OH) 2 。分别对其原粉和放电中、后期样品进行X射线衍射 (XRD)和傅立叶变换红外 (FTIR)图谱分析 。Spherical β Ni(OH) 2 was prepared from different nickel salt by homogeneous complexing precipitation method. The differences between their charge/discharge and cyclic voltammetry properties and the reasons of the differences were studied for the first time. There are much differences in electrochemical properties of the prepared Ni(OH) 2.The specific capacity, cycle life and the discharging plateau of the material prepared from NiSO 4 were superior to those of the material prepared from Ni(NO 3) 2. The raw materials were studied by XRD and FTIR measurements before, during and after charge/discharge process. The reason of the differences were analyzed theoretically.

关 键 词：电化学比容量 碱性蓄电池 MH-NI电池 镍盐合成 充放电过程 Β-NI(OH)2 

分 类 号：TM912.2[电气工程—电力电子与电力传动]