氢氧化镍正极材料电化学性能研究（英文）  

Electrochemical Performance of Ni(OH)2 Positive Materials

作　　者：张文广[1] 焦殿辉[1] 姚远[1] 金刚[1] 蒋文全[2] 

机构地区：[1]环境保护部核与辐射安全中心,北京100082 [2]北京有色金属研究总院,北京100088

出　　处：《稀有金属材料与工程》2014年第9期2055-2059,共5页Rare Metal Materials and Engineering

摘　　要：采用化学共沉积方法制备了5种不同化学成分的氢氧化镍正极材料。用含有Co、Zn、Ca、Mg、Cu或者Mn元素的化合物与硫酸镍混合,在一定的搅拌速率、温度和pH值下使之相互发生反应。XRD衍射分析表明所制备材料的显微结构为β-Ni(OH)2。SEM图片显示氢氧化镍为球形颗粒,且颗粒表面略显粗糙。电化学测试结果表明氢氧化镍样品B在不同的充放电倍率和温度下具有优异的性能,25和65℃下、充放电倍率分别为1和3 C时氢氧化镍样品B的放电容量均超过了285 mAh·g-1。实验表明,通过化学共沉积其他元素可以制备性能优异的氢氧化镍正极材料,这将有益于改进镍氢电池的性能。Five kinds of Ni（OH）2 positive materials with different chemical compositions were prepared by a chemical coprecipitation method. The compounds with Co, Zn, Ca, Mg, Cu or Mn elements were mixed with nickel sulfate and reacted with each other at a special temperature and pH value under stirring. The XRD analysis indicates that the microstructure of as-prepared materials is β-Ni（OH）2. SEM images show the particles are spherical with a little rough surface. The electrochemical results indicate that the Ni（OH）2 B has the best performances at different rates and temperatures. The discharge capacities for Ni（OH）2 B sample can achieve more than 285 mAh·g-1 at 1 C/3 C rate both at 25 and 65 ℃. The experiment shows that the Ni（OH）2 positive materials with perfect properties can be synthesized by coprecipitating other elements, which is helpful for the improvement of Ni-MH batteries.

关 键 词：氢氧化镍 高温 高充放电倍率 镍氢电池 

分 类 号：TM912[电气工程—电力电子与电力传动]