亚微米级球形α-Ni(OH)_2的制备、结构及性能  

Preparation，Structure and performances of submicronic spherical α-Ni(OH)_2

作　　者：杨书廷[1] 陈改荣[2] 尹艳红[1] 陈红军[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 [2]平原大学化工系,河南新乡453002

出　　处：《电池》2001年第3期107-109,共3页Battery Bimonthly

摘　　要：采用均匀络合共沉淀法，用 Ａｌ部分替代Ｎｉ，选择合适的成球剂，合成分子式为Ｎｉ０．８Ａｌ０．２（ＯＨ）２·（ｎ－ｘ）Ｈ２Ｏ·ｘＮＨ３的亚微米级球形α－Ｎｉ（ＯＨ）２。并采用Ｘ射线衍射（ＸＲＤ）、差热技术、扫描电镜和傅立叶变换红外（ＦＴＩＲ），对其结构以及相组成进行研究。电化学测试表明：制得的亚微米级球形α－Ｎｉ（ＯＨ）２与普通的α－Ｎｉ（ＯＨ）２和球形β－Ｎｉ（ＯＨ）２相比。具有电化学比容量高、活性物质利用率高和循环可逆性好等优点。Submicronic spherical compounds of formula Ni0.8Al0.2 (OH)2·(n-x)H2O·xNH3, having the same structure as that of α-Ni(OH)2, were synthesized with method of homogeneous complexing co-precipitation by substituting nickel with aluminum and using appropriate conglobating reagent. The structure, morphology and composition of the compounds were investigated by X-ray diffraction, thermogravimetry, scanning electron microscopy and Fourier transform infrared spectroscopy. The electrode comprising the prepared α-Ni(OH)2 had greater specific capacity and higher utilization of active material than the ordinary α-Ni(OH)2 and β-Ni(OH)2 electrode. Cyclic voltammetry results showed that the compound had better reversibility.

关 键 词：均匀络合共沉淀法 亚微米级球形α-Ni(OH)2 电化学比容量 镍电池 

分 类 号：TM910.3[电气工程—电力电子与电力传动]