以氯化钴为原料、氨水(28%(质量分数))为沉淀剂采用均匀沉淀法合成了纯α-Co(OH)2.采用X射线衍射(XRD)、扫描电镜(SEM)、循环伏安、恒电流放电测试对样品形貌及电化学性能进行了表征和测试,研究结果表明,表面活性剂Tween-80加入不但对样品的形貌有很大的改善;而且电化学性能也得到提高,其单电极比电容达到370F/g。
α-Co(OH)2 particles were prepared with cobalt chloride as the raw material and ammonia (28wt.%) as the precipitator by coordination homogeneous precipitation method in this paper. The morphology and electrochemical properties of the samples were examined by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammogram, galvanostatic discharge tests. The results show that the Co(OH)2 prepared with Tween-80 as surfactant has a good morphology and capacity, and its specific capacitance as single electrode was up to 370 F/g.