以P123为表面活性剂,采用软模板法合成MnO2/CNT纳米复合材料.采用x射线衍射、热重和差热分析、傅立叶变换红外光谱分析和高分辨率透射电子显微镜对样品进行表征.结果表明,样品为弱结晶的α-MnO2,直径约10nm,长30-50 nm,它们附着在碳纳米管壁上.样品的电化学性能通过组成Li-MnO2进行电池充放电和电化学阻抗测试(EIS),与纯二氧化锰相比,MnO2/CNT纳米复合材料具有更大的初始容量275.3 mA.h/g和更好的倍率和循环性能.%Nanostructured MnO2/CNT composite was synthesized by a soft template approach in the presence of Pluronic P123 surfactant.The product was characterized by X-ray diffraction,thermogravimetric and differential thermal analyses,Fourier transformed infrared spectroscopy and high-resolution transmission electron microscopy.The results show that the sample consists of poor crystalline α-MnO2 nanorods with a diameter of about 10 nm and a length of 30-50 nm,which absorb on the carbon nanotubes.The electrochemical properties of the product as cathode material for Li-MnO2 cell are evaluated by galvanostatic charge-discharge and electrochemical impedance spectroscopy(EIS).Compared with pure MnO2 electrode,the MnO2/CNT composite delivers a much larger initial capacity of 275.3 mA.h/g and better rate and cycling performance.
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