Three-dimensional ordered nanostructures for supercapacitor electrode

Li Li, Jingjing Qiu, Shiren Wang

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

A novel three-dimensional (3D) network structure consisting of vertically aligned polyaniline array/graphene-film/polyaniline array was fabricated via multistep nanowire growth and graphene deposition. The choice of acid in the synthesis process plays a critical role in the morphology of 3D network structures and electrochemical performance. Using HClO4 helps to achieve more favorable porous morphology and led to better electrochemical properties. The 3D-network materials were used as supercapacitor electrode, and the electrochemical impedance results indicated that the charge transfer resistance was as low as ignorable. The ion diffusion resistance could be as low as 0.22 Ω due to the novel well-defined three-dimensional network structure. Ragone plots showed that this novel structure contributed to high power-density and energy-density. The optimal supercapacitor demonstrated a combination of high power-density (7622 W kg-1) and energy-density (126 Wh kg-1).

Original languageEnglish
Pages (from-to)278-284
Number of pages7
JournalElectrochimica Acta
Volume99
DOIs
StatePublished - Jun 1 2013

Keywords

  • 3D network nanostructure
  • Graphene
  • Polyaniline nanowire array
  • Supercapacitor

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