Abstract
Nanostructured MnO 2/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-MnO 2 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-MnO 2 cell are evaluated by galvanostatic charge-discharge and electrochemical impedance spectroscopy (EIS). Compared with pure MnO 2 electrode, the MnO 2/CNT composite delivers a much larger initial capacity of 275.3 mA·h/g and better rate and cycling performance.
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