Nano Research

, Volume 3, Issue 12, pp 895–901

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

  • Hua Cheng
  • Zhou Guang Lu
  • Jian Qiu Deng
  • C. Y. Chung
  • Kaili Zhang
  • Yang Yang Li
Open Access
Research Article
  • 2.6k Downloads

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.

Keywords

Cobalt oxide (Co3O4nanowire arrays electrode materials supercapacitors lithium ion batteries high rate capability 

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Hua Cheng
    • 1
    • 2
  • Zhou Guang Lu
    • 1
    • 2
  • Jian Qiu Deng
    • 1
  • C. Y. Chung
    • 1
  • Kaili Zhang
    • 3
  • Yang Yang Li
    • 1
  1. 1.Department of Physics and Materials ScienceCity University of Hong Kong, HKSARHong KongChina
  2. 2.School of Chemistry and Chemical EngineeringCentral South UniversityChangsha, HunanChina
  3. 3.Department of Manufacturing Engineering and Engineering ManagementCity University of Hong Kong, HKSARHong KongChina

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