Capacitive Behavior of MnO2 Nanowires Prepared by Hydrothermal Synthesis Method

Abstract:

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KMnO4 and MnSO4 were used to prepare MnO2 nanowires for supercapacitors hydrothermal synthesis method. Scanning electron microscope (SEM), N2 adsorption-desorption and X-ray diffraction (XRD) were used to analyze the as prepared MnO2. Electrochemical performance of MnO2 was characterized by cyclic voltammetry and galvanostatic charge/discharge. The results showed that the nanowires were α-MnO2 with a diameter of 30 to 40 nm. The specific surface area and mean pore diameter was 164.5 m2g-1 and 3.1 nm, respectively. In an electrolyte of 1 molL-1 (NH4)2SO4, the MnO2 had typical capacitive characterization in the potential region of –0.4~0.5V(vs. SCE). At a current density of 10 mAcm-2, a specific capacitance of 466 Fg-1 was achieved. Supercapacitors based on the nanowires exhibited high cycling efficiency

Info:

Periodical:

Advanced Materials Research (Volumes 152-153)

Edited by:

Zhengyi Jiang, Jingtao Han and Xianghua Liu

Pages:

1551-1554

DOI:

10.4028/www.scientific.net/AMR.152-153.1551

Citation:

M. G. Deng and Y. F. Chen, "Capacitive Behavior of MnO2 Nanowires Prepared by Hydrothermal Synthesis Method", Advanced Materials Research, Vols. 152-153, pp. 1551-1554, 2011

Online since:

October 2010

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$35.00

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