沉淀法制备Co(OH)_2及其电化学性能  

Preparation of Co(OH)_2 by Precipitation and Its Electrochemical Performance

作　　者：付国瑞[1] 胡中爱[2] 

机构地区：[1]甘肃农业大学理学院,兰州730070 [2]西北师范大学化学化工学院,兰州730070

出　　处：《机械工程材料》2013年第8期31-35,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(20963009);甘肃省自然科学基金资助项目(0803RJA005)

摘　　要：采用简单的化学沉淀法,以氯化钴和氨水为原料,制备了电活性α-Co(OH)2;用X射线衍射(XRD)仪和红外光谱(FT-IR)仪对其组成进行了分析,用热分析仪对其热稳定性进行了分析,用循环伏安和恒电流充放电等方法对其电化学性能进行了研究。结果表明:所制备的α-Co(OH)2纯度较高,热稳定性较差,但具有良好的电化学性能,单电极比电容为543.8F·g-1,经1 000次循环充放电后比电容为初始容量的72%。The electroactive material of a-Cobalt hydroxide was prepared using cobalt chloride and ammonia as raw materials by a simple chemical precipitation method. The structure of Co（OH）2 was characterized using X-ray diffraction （XRD） and the component was analyzed by FT-IR. Thermal stability of Co（OH）2 was measured by thermal analysis, including thermogravimetry （TG） and differential thermogravimetry （DTG）. The electrochemical performance was investigated by cyclic voltammetry and eonstant current charge/discharge technology. The results show that the prepared material was pure a-Co（OH）2 which had bad thermal stability, hut exeellent electrochemical performances. Its specific capacitance as single electrode was 543. 8 F g 1. And after 1 000 cycle charge and discharge, the specific capacitance was 72% of the initiaI capacity.

关 键 词：CO(OH)2 比电容 电化学性能 

分 类 号：O646[理学—物理化学]