高密度高活性球形氢氧化镍的制备与性能控制  

Preparation of the high-density,high-activity,and spherical nickel hydroxide and its performance controll

作　　者：姜长印[1] 万春荣[1] 张泉荣[1] 章金基 

机构地区：[1]清华大学核能技术设计研究院

出　　处：《电源技术》1997年第6期243-247,266,共6页Chinese Journal of Power Sources

摘　　要：采用控制结晶法制备了高密度球形Ｎｉ（ＯＨ）２。研究了制备条件及产品的晶体结构与其电化学活性的关系。结果表明，要制备出高密度高活性的Ｎｉ（ＯＨ）２产品，不仅要严格控制反应和结晶的工艺条件，还要依靠专门的反应器，以便造成一个合适的流体力学条件。本实验所制备的产品具有晶粒细小、比表面积大（大于２５ｍ２·ｇ－１）和堆积密度高（大于２．１ｇ·ｃｍ－３）的特点。Ｎｉ（ＯＨ）２的晶体结构与其电化学活性关系密切，实验结果表明，（００１）晶面和（１０１）晶面的Ｘ光衍射峰半高宽分别大于０．７°和０．８°的产品，具有活性物质利用率高和大倍率充放电性能好的优点。The spherical nickel hydroxide with high density was prepared with a “controlled crystallization”method.The relation between the preparation condition and the electrochemical activity,crystal structure of the products were investigated.The results indicate that the process condition of reaction and crystallization,and the special reactor are both important for the preparation of nickel hydroxide products.The products have fine crystal grain,specific surface area more than 25m2·g-1,and bulk density higher than 2.1g·cm-3.The full width of half maximum intensity (FWHM) of the XRD patterns of the samples in (001) and (101) lines are more than 0.7°and 0.8°respectively.These products show a higher utilization and excellent cycling performance.

关 键 词：球形 氢氧化镍 电化学活性 正极材料 蓄电池 

分 类 号：TM912.04[电气工程—电力电子与电力传动]