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.
出处
《机械工程材料》
CAS
CSCD
北大核心
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)
关键词
CO(OH)2
比电容
电化学性能
Co（OH）2
specific capacitance electrochemical performance
