摘要
选取Co、Zn、Ca、Mg、Cu和Mn元素与Ni元素以一定化学计量比共沉积,并对其进行修饰或掺杂,制备出新型氢氧化镍正极材料。采用恒电流充放电技术测试其在不同温度不同倍率下的充放电性能,并测试了样品的粒径和振实密度。研究结果表明:粒径尺寸分布适中,振实密度较高;通过多元素协同掺杂,可显著提高析氧电位,抑制析氧副反应的发生。多元素之间的协同掺杂是改善氢氧化镍正极材料高温大电流充放电性能的有效途径。
New style nickel hydroxide materials were prepared by chemical precipitation of cobalt,zinc,calcium,magnesium,copper,manganese and nickel elements followed by decorating or dopping.Charge-discharge properties were analyzed by galvanostatic charge-discharge cycling technology on conditions of different temperature and different times ratio.Particle size and tap density were also tested.The results showed that particle size distribution ranging from 5 to 8 μm and tap density is higher.The oxygen evolution potential was enhangced and occurrence of oxygen evolution was inhibited.Simultaneously,co-precipitation based on the synergic effect of many elements was an effective method improving huge current charge-discharge performances at high temperature of nickel hydroxide cathode material.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2010年第6期1386-1390,共5页
Journal of Synthetic Crystals
基金
内蒙古自然科学基金(2009MS0204)
内蒙古自治区高等学校科学研究项目(NJ09084)
关键词
共沉积
粒度
振实密度
充放电性能
氢氧化镍
co-precipitation
particle size
tap density
charge-discharge performance
nickel hydroxide
