NiO纳米电池材料的制备及电化学性能研究

Preparation of NiO nano-Battery and Electrochemical Properties of Materials

在200℃下用溶剂热的方式将醋酸镍热分解,引入PVP活性剂,得到由3～5nm厚的薄片组成的直径约为100nm NiO中空球,通过改变PVP的数量,完成了NiO组装线表面积从约70m2.g-1到约200m2.g-1的调整,对比实验表明NiO组装球表面积对其放电容量有显著的影响,电化学测试NiO中空球具有823mA'h/g的放电容量,而且这些中空球也显示慢的容量衰退速度。

NiO hollow spheres with diameters about 100 nm have been prepared by solventhermal method which made nickel acetate decomposed at 200℃. These spheres were composed of nanosheets about 3-5 nm thick. Poly（vi- nylpyrrolidone） （PVP） was used to control the products＇ morphology. The results showed that adjusting the quantity of PVP,NiO assembled spheres with tunable-surface areas from 70 to 200 m2· g^-1 were obtained. Electrochemical tests showed that NiO hollow spheres had a large discharge capacity of 823 mA·h·g^-1 and a slow capacity-fading rate. In contrast to the NiO spheres without PVP,NiO hollow spheres could greatly improve the discharge capacity.