Ternary nanostructures of Cr2O3/graphene oxide/conducting polymers for supercapacitor application

In this work, nanostructured composites of Cr2O3-graphene oxide (Cr2O3/GO) with conducting polymers; polyaniline (PANI) and polypyrrole (PPy) with the shape of cauliflower were synthesized via s simple and low cost one-step chronoamperometry method. The structures and morphologies of the resulting t...

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Veröffentlicht in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Jg. 823; S. 505 - 516
Hauptverfasser: Asen, Parvin, Shahrokhian, Saeed, zad, Azam Iraji
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 15.08.2018
Schlagworte:
Chromium oxide
Graphene oxide
Polyaniline
Polypyrrole
Supercapacitor
Ternary composite
Supercapacitor
Graphene oxide
Polyaniline
Chromium oxide
Ternary composite
Polypyrrole
ISSN:1572-6657, 1873-2569
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Zusammenfassung:In this work, nanostructured composites of Cr2O3-graphene oxide (Cr2O3/GO) with conducting polymers; polyaniline (PANI) and polypyrrole (PPy) with the shape of cauliflower were synthesized via s simple and low cost one-step chronoamperometry method. The structures and morphologies of the resulting ternary nanocomposites were characterized by using Fourier transform infrared spectroscopy, X-ray diffraction, field emission scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The electrochemical capacitive properties of the prepared nanocomposites were evaluated by using cycle voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The as-synthesized Cr2O3/GO/PANI and Cr2O3/GO/PPy composites exhibit a highest specific capacitance of 525 and 495 F g−1 at 5 A g−1 in the three-electrode tests, respectively. Interestingly, Cr2O3/GO/PANI and Cr2O3/GO/PPy composites retain 84 and 80% of their initial capacitance values after 4000 charge-discharge cycles, suggesting good electrochemical stability of the nanocomposite electrodes. The assembled symmetric devices based on Cr2O3/GO/PANI and Cr2O3/GO/PPy composites show a high specific capacitance of 263 and 100 F g−1 at the current density of 5 A g−1, respectively. [Display omitted] •Cr2O3/GO/CPs is deposited on SS using a potentiostatic method.•Cr2O3/GO/PANI showed an excellent specific capacitance of 895 F g−1 at 5 A g−1.•Cr2O3/GO/PPy has a good specific capacitance of 695 F g−1 at 5 A g−1.•Cr2O3/GO/PANI shows highest power and energy density among the prepared composite electrodes.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2018.06.048