Synthesis and Capacitance Characteristics of the Graphene Grafted Polypyrrole Composites

doi:10.3724/SP.J.1077.2013.12289

Abstract

Abstract:

The graphene grafted polypyrrole composites were in situ synthesized with the chemical grafting method. The testing and characterization of the structure and morphology indicated that the pyrrole monomer in the composites was grafted with the graphene lamellar layer on-chip evenly distributed through the amide bond, and a large number of the pyrrole grow into a chain connecting to the graphene layers. The synergistic effect of graphene and polypyrrole made the conductivity of the composites significantly improve from 0.22 S/cm to 3.32 S/cm. The capacitance value of graphene grafted polypyrrole composites reached 284 F/g, which increased by 52% compared with the specific capacitance of pure polypyrrole 186 F/g. It indicated the composites’s excellent characteristics of the capacitor.

Key words: graphene, polypyrrole, in-situ synthesis, composites, specific capacitance

CLC Number:

TQ152

LIU Jian-Hua, ZHANG Shi-Lu, YU Mei, AN Jun-Wei, LI Song-Mei. Synthesis and Capacitance Characteristics of the Graphene Grafted Polypyrrole Composites[J]. Journal of Inorganic Materials, 2013, 28(4): 403-408.

Figures/Tables 7

Fig. 1 SEM images of PPy (a), graphene (b) and graphene polypyrrole composite material (c,d)

Fig. 2 TEM images of graphene (a) and graphene polypyrrole composites (b)

Fig. 3 XRD patterns of graphene and graphene polypyrrole composites

Fig. 4 Raman spectra of graphene, polypyrrole and graphene polypyrrole composites

Fig. 5 FT-IR spectra of (a) polypyrrole, (b) graphene and (c) graphene polypyrrole composites

Fig. 6 Reaction process diagram

Fig.7 Galvanostatic charge/discharge tests for polypyrrole, graphene and graphene polypyrrole composites at a current density of 0.1 A/g

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