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Journal of Nanomaterials
Volume 2017 (2017), Article ID 1404328, 8 pages
https://doi.org/10.1155/2017/1404328
Research Article

Self-Assembly of 3D Fennel-Like Co3O4 with Thirty-Six Surfaces for High Performance Supercapacitor

1Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan, Shanxi 030051, China
2Department of Applied Analytical & Physical Chemistry, Ghent University, Global Campus, 119 Songdomunhwa-ro, Yeonsu-gu, Incheon 21985, Republic of Korea
3School of Materials Science and Engineering, North University of China, Taiyuan, Shanxi 030051, China

Correspondence should be addressed to Chenyang Xue; nc.ude.cun@gnaynehceux

Received 1 December 2016; Accepted 2 February 2017; Published 7 March 2017

Academic Editor: Nicholas Roberts

Copyright © 2017 Yanfang Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Three-dimensional (3D) fennel-like cobalt oxide (II, III) (Co3O4) particles with thirty-six surfaces on nickel foams were prepared via a simple hydrothermal synthesis method and its growth process was also researched. The crystalline structure and morphology were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and Raman spectroscopy. The Brunauer-Emmett-Teller (BET) analysis revealed that 3D fennel-like Co3O4 particles have high specific surface area. Therefore, the special structure with thirty-six surfaces indicates the good electrochemical performance of the micron-nanometer material as electrode material for supercapacitors. The cyclic voltammetry (CV), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS) were conducted to evaluate the electrochemical performances. Compared with other morphological materials of the similar sizes, the Co3O4 particles on nickel foam exhibit a high specific capacitance of 384.375 F·g−1 at the current density of 3 A·g−1 and excellent cycling stability of a capacitance retention of 96.54% after 1500 galvanostatic charge-discharge cycles in 6 M potassium hydroxide (KOH) electrolyte.