▎ 摘 要
In this work, we reported a novel and facile procedure for the functionalization of graphene oxide (GO) by using 2-aminoanthraquinone (AAQ), with a structure of AAQ molecules covalently grafted onto GO sheets. The as-prepared nanocomposites were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), transmission electron microscope (TEM), galvanostatic measurements, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). Amazingly, the AAQ modified GO nanosheets showed an improved electrochemical performance, in terms of cycling performance and rate capability. Specifically, the nanosheets exhibited a high capacity of 467 mA h g(-1) at a current density of 5 A g(-1), and a specific capacity of 866 mAh g(-1) after 500 cycles at 500 mA g(-1). (C) 2020 Elsevier Ltd. All rights reserved.