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中文摘要：
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%。
英文摘要：
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%.
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