Graphene-MnFe2O4-polypyrrole ternary hybrids with synergistic effect for supercapacitor electrode

Tran Viet Thu, To Van Nguyen, Xuan Duong Le, The Son Le, Vu Van Thuy, Tran Quang Huy, Quang Duc Truong

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

Hybridization of dissimilar materials is a promising solution to improve desired properties in various applications. Herein, we chemically grew a conductive polymer (polypyrrole, PPy) on graphene-supported manganese ferrite microspheres (MG, ∼344 nm in size) to form PPy/MG hybrids at various PPy contents (20, 33.3, and 42.9 wt%). PPy, MG binary, and PPy/MG ternary hybrids were comprehensively characterized to correlate their structure, morphology, and properties. Electrochemical measurements revealed a significantly enhancement of capacitive performances of PPy/MG as comparison to those of each component. Consequently, the combination of PPy and MG resulted in maximum specific capacitance of 147.2 F/g at scan rate of 10 mV/s or 66.1 F/g at current density of 0.5 A/g. These synergistic and cooperative effects are attributed to reduced diffusion resistance in the PPy/MG hybrids. This work thus suggests an efficient strategy to develop high-performance material for supercapacitor electrode.

Original languageEnglish
Pages (from-to)151-160
Number of pages10
JournalElectrochimica Acta
Volume314
DOIs
Publication statusPublished - 2019 Aug 10

Keywords

  • Graphene oxide
  • MnFeO
  • Polypyrrole
  • Supercapacitor
  • Synergistic effect
  • Ternary hybrids

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Electrochemistry

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