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http://dx.doi.org/10.14478/ace.2016.1105

Synthesis of MnO2 Nanowires by Hydrothermal Method and their Electrochemical Characteristics  

Hong, Seok Bok (Department of Chemical Engineering, Kangwon National University)
Kang, On Yu (Department of Chemical Engineering, Kangwon National University)
Hwang, Sung Yeon (Korea Research Institute of Chemical Technology)
Heo, Young Min (SKC Advanced Technology R&D Center)
Kim, Jung Won (Department of Chemical Engineering, Kangwon National University)
Choi, Bong Gill (Department of Chemical Engineering, Kangwon National University)
Publication Information
Applied Chemistry for Engineering / v.27, no.6, 2016 , pp. 653-658 More about this Journal
Abstract
In this work, we developed a synthetic method for preparing one-dimensional $MnO_2$ nanowires through a hydrothermal method using a mixture of $KMnO_4$ and $MnSO_4$ precursors. As-prepared $MnO_2$ 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 $MnO_2$ 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 $MnO_2$ nanowire electrodes were also investigated using cyclic voltammetry and galvanostatic charge-discharge with a three-electrode system. $MnO_2$ 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.
Keywords
supercapacitor; $MnO_2$; nanowire structure; electrochemical performance;
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