Effect of different modes of electrodeposition on supercapacitive properties of MnO2 thin films

被引：83
作者：
Dubal, D. P. [1 ]
Dhawale, D. S. [1 ]
Gujar, T. P. [2 ]
Lokhande, C. D. [1 ]
机构：
[1] Shivaji Univ, Dept Phys, Thin Film Phys Lab, Kolhapur 416004, Maharashtra, India
[2] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitecton MANA, Tsukuba, Ibaraki 3050047, Japan
来源：
APPLIED SURFACE SCIENCE | 2011年 / 257卷 / 08期
关键词：
Modes of electrodeposition; Surface morphology; Supercapacitor; Charge-discharge; Impedance spectroscopy; MANGANESE-DIOXIDE; NANOPARTICLES;
D O I：
10.1016/j.apsusc.2010.11.028
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In present investigation MnO2 thin films have been prepared by potentiodynamic (PD), potentiostatic (PS) and galvanostatic (GS) modes of electrodeposition. The effects of different modes on structural, surface morphological and supercapacitive properties of MnO2 thin films have been investigated. Formation of amorphous phase of MnO2 by all three modes is confirmed from X-ray diffraction (XRD) patterns. Significant change in the surface morphologies of MnO2 thin films due to different modes has been observed. The supercapacitive properties of MnO2 thin films have been studied in 1 MNa2SO4 electrolyte. The maximum supercapacitance obtained for potentiodynamic, potentiostatic and galvanostatic modes is 237, 196 and 184 F g(-1), respectively. Additionally charge-discharge and impedance of MnO2 thin films have been investigated. (C) 2010 Elsevier B.V. All rights reserved.
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收藏
页码：3378 / 3382
页数：5
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