直接还原高锰酸钾制备CNT/MnO_2复合材料  

Preparing CNT/MnO_2 composite by direct reducing potassium permanganate

作　　者：曾双双[1] 郑明森[1] 董全峰[1] 

机构地区：[1]厦门大学化学系,固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《电池》2010年第3期121-123,共3页Battery Bimonthly

基　　金：国家自然科学基金项目(200933005,20903077);973项目(2009CB220102);福建省科技项目(2006H0090,2008H0087)

摘　　要：直接还原高锰酸钾(KMnO4)制备了碳纳米管(CNT)/MnO2复合材料。用XRD、SEM和TEM等对复合材料进行形貌和结构分析,发现MnO2均匀地包覆在CNT表面。循环伏安、恒流充放电测试表明,复合材料的比电容较高,循环性能良好,以1 A/g、20 A/g放电的比电容分别为200.3 F/g和120.8 F/g,第2 000次循环(20 A/g)时的电容保持率为94.7%。Carbon nanotube（CNT）/MnO2 composite was prepared by direct reducing potassium permanganate（KMnO4）.The morphology and structure of the composite were analyzed by XRD,SEM and TEM.It was found that MnO2 homogeneously dispersed on the surface of CNT.Cyclic voltammetry and galvanostatic charge-discharge tests showed that the composite had high specific capacitance and fine cycle performance.The specific capacitance was 200.3 F/g and 120.8 F/g when discharged at 1 A/g,20 A/g,respectively.The capacitance retention at the 2 000th cycle（20 A/g）was 94.7%.

关 键 词：二氧化锰(MnO2) 碳纳米管(CNT) 超级电容器 复合材料 

分 类 号：TM533[电气工程—电器]