The Enhanced Supercapacitive Performance of the Hybrid Material Integrating Doped-Polymer with the Composite of Graphene Oxide and Mn3O4

•A new supercapacitive material by integrating conjugated polymers with the composite of graphene oxide and Mn3O4 has been synthesized.•The photopolymerization method establishes the interaction in the ternary composite materials.•The conjugated polymers in the doped GPM composite are efficiently doped by HCl solution, thus improving the conductivity of hybrid materials.•The as-prepared material shows the enhanced supercapacitive properties with high specific capacitance and long-term charge-discharge cycling stability.

We synthesize a new supercapacitive material by integrating conjugated polymers with the composite of graphene oxide (GO) and Mn3O4 through photopolymerization. The GO-conjugated polymer composite is prepared via in situ photopolymerization of Pyrrole and 3,4-ethylenedioxythiophene on the surface of GO, followed by the hydrothermal synthesis of Mn3O4 to obtain GO-Polymer-Mn3O4 (GPM). In order to optimize the supercapacitive performance of GPM, the GO-conjugated polymer composite is doped by HCl solution to improve the conductivity of the doped GPM composite. The structures of the composites are characterized using transmission electron microscopy, selected-area electron diffraction, field-emission scanning electron microscopy, fourier transform infrared spectroscopy, X-ray diffractometry, thermogravimetric analysis, X-ray photoelectron spectroscopy and Brunauer-Emmett-Teller. The supercapacitive properties of the doped GPM composite are investigated using different electrochemical techniques including cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy. The doped GPM electrode shows a high specific capacitance and long-term charge-discharge cycling stability.

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