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In this work, we developed a synthetic method for preparing one-dimensional MnO2 nanowires through a hydrothermal method using a mixture of KMnO4 and MnSO4 precursors. As-prepared MnO2 nanowires had a high surface area and porous structure, which are beneficial to the fast electron and ion transfer during electrochemical reaction. The microstructure and chemical structure of MnO2 nanowires were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and Brunauer-Emmett-Teller measurements. The electrochemical properties of MnO2 nanowire electrodes were also investigated using cyclic voltammetry and galvanostatic charge-discharge with a three-electrode system. MnO2 nanowire electrodes showed a high specific capacitance of 129 F/g, a high rate capability of 61% retention, and an excellent cycle life of 100% during 1000 cycles.

Synthesis of MnO2Nanowires by Hydrothermal Method and their Electrochemical Characteristics

Synthesis of MnO₂Nanowires by Hydrothermal Method and their Electrochemical Characteristics