Karthikeyan, K. and Kalpana, D. and Renganathan, N.G. (2009) Synthesis and characterization of ZnCo2O4 nanomaterial for symmetric supercapacitor applications. Ionics, 15 (1). pp. 107-110. ISSN 0947-7047

PDF Restricted to Registered users only Download (194Kb) | Request a copy

Abstract

ZnCo2O4 nanomaterial was prepared by coprecipitation method and characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), cyclic voltammetry (CV), and galvanostatic charge–discharge tests at various current densities. It is shown that the crystal structure and surface morphology play an important role in the enhancement of the specific capacitance. The TEM results clearly indicate that the prepared material shows aggregated particles. The particle size powder was about 50 nm, and SEM pictures indicate a porous morphology. The electrochemical behavior of ZnCo2 O4 was characterized by mixing equal proportion of carbon nanofoam (CNF). From CV, it is concluded that the combination of redox and pseudocapacitance increases the specific capacitance up to 77 F g−1 at 5 mV s−1 scan rate. The ZnCo2O4-based supercapacitor cell has good cyclic stability and high coulombic efficiency.

Item Type:	Article
Uncontrolled Keywords:	Supercapacitor; Zinc oxide; Carbon nanofoam; Specific capacitance
Subjects:	Electrochemical Power Sources
Divisions:	UNSPECIFIED
Depositing User:	TTBD CECRI
Date Deposited:	02 Apr 2012 06:32
Last Modified:	02 Apr 2012 06:32
URI:	http://cecri.csircentral.net/id/eprint/377

Actions (login required)

View Item