Assembly of polypyrrole nanotube@MnO2 composites with an improved electrochemical capacitance

Jiayou Ji, Xiaoya Zhang, Jingya Liu, Linfeng Peng, Changlang Chen, Zhiliang Huang, Liang Li, Xianghua Yu, Songmin Shang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

31 Citations (Scopus)

Abstract

A facile strategy is presented to fabricate polypyrrole nanotube@manganese dioxide (PPy@MnO2) composites. The effect of KMnO4 concentration on the morphology and property of PPy@MnO2 composites is investigated. The microstrucutres and properties of the resulting PPy@MnO2 composites are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray diffraction (EDX), X-ray diffraction (XRD), thermo-gravimetric analysis (TGA) and electrochemical measurements. The results indicate that the PPy@MnO2 composites possess high specific capacitance and good cyclic stability due to the coating of MnO2 onto PPy nanotubes. The specific capacitance of 403 F/g for the PPy@MnO2 composite is obtained from galvanostatic charge-discharge experiment at a current density of 1 A/g, exhibiting the potential application for supercapacitors.
Original languageEnglish
Pages (from-to)51-56
Number of pages6
JournalMaterials Science and Engineering B: Solid-State Materials for Advanced Technology
Volume198
DOIs
Publication statusPublished - 1 Aug 2015

Keywords

  • Capacitance
  • Composites
  • MnO<inf>2</inf>
  • Polypyrrole

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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