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Nanoarchitectures constructed with single crystalline Co3O4 spheres and MWCNTs: Temperature effect on the growth and supercapacitors

Published online by Cambridge University Press:  28 March 2013

Yuanhua Xiao ,
Yongbo Cao ,
Aiqin Zhang ,
Dianzeng Jia  and
Feng Li
Yuanhua Xiao
Affiliation:
Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, P. R. China
Yongbo Cao
Affiliation:
State Laboratory of Surface and Interface Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China
Aiqin Zhang
Affiliation:
State Laboratory of Surface and Interface Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China
Dianzeng Jia
Affiliation:
Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, P. R. China
Feng Li*
Affiliation:
Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, P. R. China State Laboratory of Surface and Interface Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, P. R. China American Advanced Nanotechnology LLC, Missouri City, TX 77459, USA
*
*Corresponding author, Email: lifeng696@yahoo.com; lifeng696@gmail.com
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Abstract

Nanoarchitectures consisting of single crystalline Co3O4 spheres and multi-walled carbon nanotubes (MWCNTs) have been constructed successfully. The effect of reaction temperature on the morphology of the products reveal that the growth rate dictates the shape and size of Co3O4 beads on and around MWCNTs. Single crystalline Co3O4 spheres around MWCNTs can be produced in large scale by elevating reaction temperature for the increased growth rate. The electrochemical properties of the hybrid materials were investigated by cyclic voltammetry (CV) and galvanostatic charge/discharge tests. The supercapacitors made with the nanoarchitectures show high specific capacitance of 445 F/g at a current density of 0.1 A/g and exhibit excellent cycling stability.

Keywords

crystal growthenergy storagenanostructure
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1497: Symposium K – Hierarchically Structured Materials for Energy Conversion and Storage , 2013 , mrsf12-1497-k04-05
Copyright
Copyright © Materials Research Society 2013

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References

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