학술논문
Non-Covalent Functionalization of Graphene with Bisphenol A for High-Performance Supercapacitors.
Document Type
Article
Author
Source
Subject
*GRAPHENE oxide
*BISPHENOL A
*SUPERCAPACITORS
*X-ray diffraction
*TRANSMISSION electron microscopy
*CYCLIC voltammetry
*IMPEDANCE spectroscopy
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Language
ISSN
1001-604X
Abstract
The reduced graphene oxide (RGO)/bisphenol A (BPA) composites were prepared by an adsorption-reduction method. The composites are characterized by X-ray diffraction (XRD), UV-vis, thermogravimetric (TG) analysis, field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM). The results confirm that BPA is adsorbed on the basal plane of RGO by π-π stacking interaction. Furthermore, the electrochemical behaviors were evaluated by cyclic voltammetry, galvanostatic charge/discharge techniques and electrochemical impedance spectroscopy (EIS). The results show that the RGO/BPA nanocomposites exhibit ultrahigh specific capacitance of 466 F·g−1 at a current density of 1 A·g−1, excellent rate capability (more than 81% retention at 10 A·g−1 relative to 1 A·g−1) and superior cycling stability (90% capacitance decay after 4000 cycles). Consequently, the RGO/BPA nanocomposites can be regarded as promising electrode materials for supercapacitor applications. [ABSTRACT FROM AUTHOR]