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Electrochemical properties of single-crystalline Mn3O4 nanostructures and their capacitive performance in basic electrolyte

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Int. J. Electrochem. Sci., 11 (2016) 8155 – 8162

International Journal of

ELECTROCHEMICAL

SCIENCE

www.electrochemsci.org

Short Communication

Electrochemical Properties of Single-crystalline Mn

3

O

4

Nanostructures and their Capacitive Performance in Basic

Electrolyte

Hidayat Ullah Shah1, Fengping Wang1,*, Arbab Mohammad Toufiq1,2,3, Abdul Muqsit Khattak4, Azhar Iqbal4, Zahid Ali Ghazi4, Shujaat Ali1, Xingyang Li1, Ziya Wang1

1

Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, P. R. China,

2

Department of Physics, Hazara University Mansehra, Khyber Pakhtunkhwa, Mansehra, Pakistan 3

UNAM-National Nanotechnology Research Center, Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey

4

Laboratory for Nanomaterials, National Center for Nanoscience and Technology No. 11, Beiyitiao, Zhongguancun. Beijing 100190, PR China.

*

E-mail:fpwang@ustb.edu.cn

doi: 10.20964/2016.10.41

Received: 13 June 2016 / Accepted: 15 July 2016 / Published: 6 September 2016

Single-crystalline Mn3O4 square-shaped nanostructures have been successfully synthesized by hydrothermal method without using any surfactant. The as-prepared products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Transmission electron microscopy (TEM) and High Resolution transmission electron microscopy (HRTEM). To assess the potential properties of nanostructures, galvanostatic charging–discharging and cyclic voltammetry measurements were performed for their use in supercapacitors. The Mn3O4 nanoarchitectures used as supercapacitor electrode in 1mol L-1 KOH electrolyte have a specific capacitance value of 355.5 F g-1 at a low current density of 0.35 A.g-1. The device still retain 85.08% of its initial capacitance afterwards 2000 cycles at a current density of 5 A.g-1. The as-synthesized Mn3O4 nanostructures exhibited a good rate capability and stability for electrochemical properties. These results indicate their potential application as electrode material for high performance supercapacitor in basic medium.

Keywords: Hydrothermal Method; Optical Properties; Transition metal oxides; Supercapacitance;

Electrochemical properties;

(2)

Int. J. Electrochem. Sci., Vol. 11, 2016

8156 © 2016 The Authors. Published by ESG (www.electrochemsci.org). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).

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1 UNAM-National Nanotechnology Research Center, Bilkent University, 06800 Ankara, Turkey 2 Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey

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