Porous CuCo2O4 nanocubes wrapped by reduced graphene oxide as high-performance lithium-ion battery anodes

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Wenpei Kang
  • Yongbing Tang
  • Wenyue Li
  • Zhangpeng Li
  • Xia Yang
  • Jun Xu

Detail(s)

Original languageEnglish
Pages (from-to)6551-6556
Journal / PublicationNanoscale
Volume6
Issue number12
Online published26 Mar 2014
Publication statusPublished - 21 Jun 2014

Abstract

A composite of porous CuCo2O4 nanocubes well wrapped by reduced graphene oxide (rGO) sheets has been synthesized by a facile microwave-assisted solvothermal reaction and applied as anode in lithium ion batteries (LIBs). The porous structure of the CuCo2O4 nanocubes not only provides a high surface area for contact with the electrolyte, but also assists by accommodating volume change upon charging-discharging. Impedance measurements and transmission electron microscopy show that incorporation of rGO further decreases the charge transfer resistance and improves the structural stability of the composite. As an anode material for a LIB, the composite exhibits a high stable capacity of ∼570 mA h g-1 at a current density of 1000 mA g-1 after 350 cycles. With a high specific surface area and a low charge transfer resistance, the composite anode shows impressive performance especially at high current density. The LIB shows a high capacity of ∼450 mA h g-1 even at a high current density of 5000 mA g-1, demonstrating the composite's potential for applications in LIBs with long cycling life and high power density. © The Royal Society of Chemistry 2014.

Citation Format(s)

Porous CuCo2O4 nanocubes wrapped by reduced graphene oxide as high-performance lithium-ion battery anodes. / Kang, Wenpei; Tang, Yongbing; Li, Wenyue; Li, Zhangpeng; Yang, Xia; Xu, Jun; Lee, Chun-Sing.

In: Nanoscale, Vol. 6, No. 12, 21.06.2014, p. 6551-6556.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review