Synthesis And Electrochemical Properties Of Graphene Oxide/Polypyrrole/Organic Or Inorganic Nanocomposites

In this paper, graphene oxide (GO) and polypyrrole (PPy) were utilized to cover organics or inorganics substance synthesizing nanocomposites by electrostatic interactions method and in-situ chemical oxidative polymerization. The structure and morphology of the as-prepared nanocomposites were characterized by field-emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), Fourier transform infrared (FT-IR) spectra and Raman spectra. In order to explore the electrochemical performance of the nanocomposites, CV, galvanostatic charge/discharge measurements and impedance spectra were tested by electrochemical workstation. The main experiments include four sections:1. GO/acenaphthenequinone composite was synthesized successfully via electrostatic interactions method and used as electrode for electrochemical supercapacitors effectively. The nanosheets of GO provide high surface area and conductivity. The microneedle-like acenaphthenequinone contributes specific capacitance convincingly as pesudocapacitance. GO/acenaphthenequinone composite exhibits brilliant supercapacitors performance.2. A new route to prepare core/shell structured PPy/hydroquinone nano-sphere has been proposed via an in-situ chemical oxidative polymerization. The core template, nano-sphere of p-benzoquinone, is demonstrated to work as an oxidizing agent for the in-situ polymerization of PPy, and to be reduced to 1.4-hydroquinone after reaction. According to the electrochemical properties analyses, PPy contributes electronic conductive channels for hydroquinone and hydroquinone works as a pseudocapacitance component.3. A method for synthesizing GO/nano-sulfur/PPy hydrogel is depicted. The high surface area of GO is utilized to deposit S. PPy is polymerized on the surface of GO/nano-S by in-situ chemical oxidative reaction. Then, GO/nano-S/PPy hydrogel is made easily by hydrothermal progress. The electrochemical properties are investigated in 1 M Li2SO4 electrolyte solution. GO/nano-S/PPy hydrogel exhibits high specific capacitance and excellent cycling life.4. GO/CuO-NRs composite is synthesized by electrostatic interactions method. PPy/GO/CuO-NRs nanocomposite is prepared by in situ chemical oxidation polymerization of pyyrole on the surface of GO/CuO-NRs. The property of PPy/GO/CuO-NRs nanocomposite for electrocatalytic oxidation of glucose is investigated by cyclic voltammetry.