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3724739 
Journal Article 
Facile preparation of MnO2 nanorods and evaluation of their supercapacitive characteristics 
Aghazadeh, M; Asadi, M; Maragheh, MG; Ganjali, MR; Norouzi, P; Faridbod, F 
2016 
Yes 
Applied Surface Science
ISSN: 0169-4332 
364 
726-731 
WOS:000369957800092 
The first time pulsed base (OH-) electrogeneration to the cathodic electrodeposition of MnO2 in nitrate bath was applied and MnO2 nanorods were obtained. The deposition experiments were performed under a pulse current mode with typical on-times and off-times (t(on) = 10 ms and t(off) = 50 ms) and a peak current density of 2 mA cm(-2) (I-a =2 mA cm(-2)). The structural characterization with XRD and FTIR revealed that the prepared MnO2 is composed of both alpha and gamma phases. Morphological evaluations through SEM and TEM revealed that the prepared MnO2 contains nanorods of relative uniform structures (with an average diameter of 50 nm). The electrochemical measurements through cyclic voltammetry and charge-discharge techniques revealed that the prepared MnO2 nanostructures reveal an excellent capacitive behavior with specific capacitance values of 242, 167 and 98 F g(-1) under the applied current densities of 2, 5 and 10 A g(-1), respectively. Also, excellent long-term cycling stabilities of 94.8%, 89.1%, and 76.5% were observed after 1000 charge-discharge cycles at the current densities of 2, 5 and 10 A g(-1). (C) 2015 Elsevier B.V. All rights reserved. 
MnO2; Pulse electrodeposition; Heat-treatment; Supercapacitors