Synthesis of MnO2 nanowires by hydrothermal method and their electrochemical characteristics

초록

In this work, we developed a synthetic method for preparing one-dimensional MnO<inf>2</inf>nanowires through a hydrothermal method using a mixture of KMnO<inf>4</inf>and MnSO<inf>4</inf>precursors. As-prepared MnO<inf>2</inf>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 MnO<inf>2</inf>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 MnO<inf>2</inf>nanowire electrodes were also investigated using cyclic voltammetry and galvanostatic charge-discharge with a three-electrode system. MnO<inf>2</inf>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. © 2016 The Korean Society of Industrial and Engineering Chemistry. All rights reserved.

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