NDLI: Tailoring cobalt doped zinc oxide nanocrystals with high capacitance activity: factors affecting structure and surface morphology

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RSC Advances Vol - 2 Issue - 4

RSC Advances Vol -1

RSC Advances Vol -0

Tailoring cobalt doped zinc oxide nanocrystals with high capacitance activity: factors affecting structure and surface morphology

Content Provider	Royal Society of Chemistry (RSC)
Author	Korzeniewski, Carol Gümeci, Cenk Hope-Weeks, Louisa Davis, Marauo Black, Bria
Copyright Year	2012
Abstract	Highly crystalline zinc cobaltite (ZnCo2O4) nanocrystals were successfully synthesized through an epoxide driven, sol–gel method using Zn(NO3)·6H2O and CoCl2·6H2O as precursors. The crystal phase, morphology, specific surface areas, porosity, and capacitance activity of the prepared materials were characterized by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), gas sorption techniques, and cyclic voltammetry, respectively. Results reveal that the synthesized nanocrystals are ∼4 nm in diameter. Electron microscopy studies illustrate significant changes brought on by varying the solvent and epoxide. Gas sorption analyses detail high specific surface areas (>200 m2 g−1) and porosities of the as prepared and annealed samples. Cyclic voltammetry experiments show that these zinc cobaltite nanocrystals have exceptional capacitance (∼700 Fg−1) and excellent cycle durability making them an excellent electrode material for supercapacitors.
Starting Page	2061
Ending Page	2066
Page Count	6
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	2
Issue Number	5
Journal	RSC Advances
DOI	10.1039/c2ra00793b
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Electron microscope Electrode High-resolution transmission electron microscopy Scanning electron microscope Zinc X-ray crystallography Sorption Cyclic voltammetry Transmission electron microscopy Epoxide Capacitance Cobaltite Porosity Solvent
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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