球形覆Co氢氧化镍的合成及性能研究  

Study on the Preparation and Performance of Spherical Ni(OH)_2 Hydroxide Coated with Co(OH)_2

作　　者：赫文秀[1] 张永强[1] 蒋文全[2] 傅钟臻[2] 于丽敏[2] 张文广[2] 

机构地区：[1]内蒙古科技大学生物与化学工程学院,包头014010 [2]北京有色金属研究院分析测试中心,北京100088

出　　处：《硅酸盐通报》2008年第2期276-280,284,共6页Bulletin of the Chinese Ceramic Society

基　　金：内蒙古自然基金项目(NO200711020721)

摘　　要：在自行设计制作的管式反应器中,采用化学沉积包覆的方法在球形氢氧化镍表面包覆了一层Co(OH)2膜,通过实验发现,pH值和络合剂的浓度对包覆反应有很重要的影响。表面覆钴量不同,其表面形貌、电化学循环稳定性和大电流充放电性能也有很大差异。本文利用X射线衍射仪、扫描电镜和恒流充放电技术测试了其相结构、表面微观形貌和循环寿命等方法,确定了合适的氢氧化镍表面覆钴量。Spherical nickel hydroxide was coated with a layer of cobalt hydroxide by chemical precipitation method in a specially designed tubular reactor. It was found that pH value and concentration of complexing agent have an important influence on the coating reaction, the result show that nickel hydroxide was coated by several amounts of cobalt ,some differences exist in surface morphology, electrochemical cycle stability and large current charging/discharging performance.The properties such as crystalline phase structure,surface morphology and cycle life were tested by X-ray diffractrometry, scanning electron microscopy and constant-current charge/discharge test in this study. So suitable amount of cobalt coating was determined .

关 键 词：管式反应器 球形氢氧化镍 CO(OH)2 表面包覆 

分 类 号：TQ138.13[化学工程—无机化工]