Achieving high specific charge capacitances in Fe3O4/reduced graphene oxide nanocomposites

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

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Author(s)

  • Wenhui Shi
  • Jixin Zhu
  • Dao Hao Sim
  • Yee Yan Tay
  • Ziyang Lu
  • Xiaojun Zhang
  • Yogesh Sharma
  • Madhavi Srinivasan
  • Huey Hoon Hng
  • Qingyu Yan

Detail(s)

Original languageEnglish
Pages (from-to)3422-3427
Journal / PublicationJournal of Materials Chemistry
Volume21
Issue number10
Online published24 Jan 2011
Publication statusPublished - 14 Mar 2011
Externally publishedYes

Abstract

We report a facile approach to synthesize nanocomposites with Fe3O4 nanopaticles (NPs) attached to reduced graphene oxide (rGO) sheets by a solvothermal process, which combines the growth of Fe3O4 NPs and the reduction of GOs in one single step. These Fe3O4/rGO nanocomposites were further used to fabricate thin film supercapacitor electrodes by using a spray deposition technique without the addition of insulating binders. It was found that the Fe3O4/rGO nanocomposites showed much higher specific capacitances than that of either pure rGO or pure Fe3O4 NPs. We further carried out electrochemical characterization of the Fe3O4/rGO nanocomposites with different Fe3O4 :  rGO weight ratios (e.g. IFe3O4 : rGO) and showed that Fe3O4/rGO nanocomposites with IFe3O4 : rGO = 2.8 exhibited the highest specific capacitance of 480 F g−1 at a discharge current density of 5 A g−1 with the corresponding energy density of 67 W h kg−1 at a power density of 5506 W kg−1. These Fe3O4/rGO nanocomposites also showed stable cycling performance without any decrease in the specific capacitance after 1000 charge/discharge cycles. © 2011 The Royal Society of Chemistry.

Citation Format(s)

Achieving high specific charge capacitances in Fe3O4/reduced graphene oxide nanocomposites. / Shi, Wenhui; Zhu, Jixin; Sim, Dao Hao; Tay, Yee Yan; Lu, Ziyang; Zhang, Xiaojun; Sharma, Yogesh; Srinivasan, Madhavi; Zhang, Hua; Hng, Huey Hoon; Yan, Qingyu.

In: Journal of Materials Chemistry, Vol. 21, No. 10, 14.03.2011, p. 3422-3427.

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