Co3O4/nitrogen modified graphene electrode as Li-ion battery anode with high reversible capacity and improved initial cycle performance

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

56 Scopus Citations
View graph of relations

Author(s)

  • Linfei Lai
  • Jixin Zhu
  • Zhenggang Li
  • Shuran Jiang
  • Xiaoyi Cai
  • Qingyu Yan
  • Yeng Ming Lam
  • Zexiang Shen
  • Jianyi Lin

Detail(s)

Original languageEnglish
Pages (from-to)134-143
Journal / PublicationNano Energy
Volume3
Publication statusPublished - Jan 2014
Externally publishedYes

Abstract

Co3O4 nanoparticles are grown on nitrogen modified microwave exfoliated graphite oxide (NMEG) with weight ratio controlled from 10% to 70%. Electrochemical performance reveals that the obtained Co3O4/NMEG composite as Li-ion battery anode exhibits improved cycle stability, excellent reversible capacity, high current rate performance, and reduced irreversible capacity loss in the initial cycle compared to pure Co3O4 without graphene or Co3O4 on thermally reduced graphene oxide (tRG-O). The 70%Co3O4/NMEG composite has initial irreversible capacity of 230mAhg-1 (first cycle efficiency of 77%), and 910mAhg-1 of capacity is retained after 100 cycles. The 70%Co3O4/tRG-O delivers a reversible capacity of 750±20mAhg-1, and the irreversible capacity loss during the first cycle is 700±20mAhg-1. Nitrogen functional groups in NMEG, especially pyridinic and pyrrolic N are advantageous for the Co3O4 growth. Furthermore, the N modification is effective in reducing the oxygen content of chemically prepared graphene and hence is good for Co3O4 dispersion and the amelioration of first cycle efficiency, demonstrating the potential of NMEG based composite as high performance Li-ion battery anode materials. © 2013 Elsevier Ltd.

Research Area(s)

  • Cobalt oxide, Graphene, Lithium-ion battery, Nitrogen modification

Citation Format(s)

Co3O4/nitrogen modified graphene electrode as Li-ion battery anode with high reversible capacity and improved initial cycle performance. / Lai, Linfei; Zhu, Jixin; Li, Zhenggang; Yu, Denis Y.W.; Jiang, Shuran; Cai, Xiaoyi; Yan, Qingyu; Lam, Yeng Ming; Shen, Zexiang; Lin, Jianyi.

In: Nano Energy, Vol. 3, 01.2014, p. 134-143.

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