NiO超细粉末的均匀沉淀法制备与表征(英文)  

Preparation and Characterization of Superfine NiO Powders by Homogeneous Precipitation Method

作　　者：熊利芝[1,2] 何则强[1,2] 孙新阳[2] 

机构地区：[1]吉首大学化学化工学院,湖南吉首416000 [2]中南大学化学化工学院,湖南长沙410083

出　　处：《吉首大学学报（自然科学版）》2009年第6期81-85,共5页Journal of Jishou University(Natural Sciences Edition)

基　　金：Supported by National Natural Science Foundation of China(20376086);Postdoctoral Science Foundation of China(2005037700);Natural Science Foundation of Hunan Province(07JJ3014);Scientific Research Fund of Hunan Provincial Education Depart ment(07A058);Postdoctoral Science Foundation of Central South University(2004107)

摘　　要：以Ni（NO3）2·6H2O为主要原料，以尿素为沉淀剂，采用均匀沉淀法制备超细氧化镍，并通过热重-差重（TG／DTA）、X-射线衍射（XRD）、扫描电子显微镜（SEM）等分析手段对其进行了表征．采用此方法可以得到粒径在1～2μm之间的超细氧化镍粉末．NiO的首次放电容量达到670．5mAh／g，80次循环后每次循环的容量损失仅为0．031％，表明本法制备的NiO是一种优秀的锂离子电池负极材料．Superfine NiO powders were prepared by a homogeneous precipitation method with an aqueous solution of nickel nitrate hexahydrate and urea. The microstructure, surface morphology of NiO were characterized by thermogravimertric （TG） analysis and differential thermal analysis （DTA）, X-ray diffraction （XRD）, scanning electron microscope （SEM）, infrared （IR） spectroscopy. Superfine NiO with particle size of 1-3 μm can be obtained by this method. NiO delivers a discharge capacity of more than 670.5 mAh/g,and the capacity loss per cycle after 80 times is only 0. 031%, suggesting that superfine NiO derived from this method is an excellent anode material for lithium ion batteries.

关 键 词：氧化镍 均匀沉淀法 超细粉体 负极 

分 类 号：TM912.9[电气工程—电力电子与电力传动]