Nano Research

, Volume 3, Issue 12, pp 895–901

A facile method to improve the high rate capability of Co3O4 nanowire array electrodes

Authors

  • Hua Cheng
    • Department of Physics and Materials ScienceCity University of Hong Kong, HKSAR
    • School of Chemistry and Chemical EngineeringCentral South University
  • Zhou Guang Lu
    • Department of Physics and Materials ScienceCity University of Hong Kong, HKSAR
    • School of Chemistry and Chemical EngineeringCentral South University
  • Jian Qiu Deng
    • Department of Physics and Materials ScienceCity University of Hong Kong, HKSAR
  • C. Y. Chung
    • Department of Physics and Materials ScienceCity University of Hong Kong, HKSAR
  • Kaili Zhang
    • Department of Manufacturing Engineering and Engineering ManagementCity University of Hong Kong, HKSAR
    • Department of Physics and Materials ScienceCity University of Hong Kong, HKSAR
Open AccessResearch Article

DOI: 10.1007/s12274-010-0063-z

Cite this article as:
Cheng, H., Lu, Z.G., Deng, J.Q. et al. Nano Res. (2010) 3: 895. doi:10.1007/s12274-010-0063-z

Abstract

The capability of fast charge and fast discharge is highly desirable for the electrode materials used in supercapacitors and lithium ion batteries. In this article, we report a simple strategy to considerably improve the high rate capability of Co3O4 nanowire array electrodes by uniformly loading Ag nanoparticles onto the surfaces of the Co3O4 nanowires via the silver-mirror reaction. The highly electrically conductive silver nanoparticles function as a network for the facile transport of electrons between the current collectors (Ti substrates) and the Co3O4 active materials. High capacity as well as remarkable rate capability has been achieved through this simple approach. Such novel Co3O4-Ag composite nanowire array electrodes have great potential for practical applications in pseudo-type supercapacitors as well as in lithium ion batteries.

https://static-content.springer.com/image/art%3A10.1007%2Fs12274-010-0063-z/MediaObjects/12274_2010_63_Fig1_HTML.gif

Keywords

Cobalt oxide (Co3O4)nanowire arrayselectrode materialssupercapacitorslithium ion batterieshigh rate capability
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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010