One-Pot Synthesis of Fe2O3 Nanoparticles on Nitrogen-Doped Graphene as Advanced Supercapacitor Electrode Materials

详细信息    查看全文

• 作者：Zhaoling Ma ; Xiaobing Huang ; Shuo Dou ; Jianghong Wu ; Shuangyin Wang
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：August 7, 2014
• 年：2014
• 卷：118
• 期：31
• 页码：17231-17239
• 全文大小：652K
• ISSN：1932-7455

文摘

Fe₂O₃ supported on nitrogen-doped graphene (Fe₂O₃/N-rGO) hydrogel was prepared by a facial one-pot hydrothermal method. The efficient Fe₂O₃ loading and nitrogen doping of graphene was realized with this method. The morphology and structure of the samples were characterized by scanning electron microscopy, high-resolution transmission electron microscopy, thermal gravimetric analysis, Raman spectra, X-ray diffraction, and nitrogen isothermal adsorption鈥揹esorption. The chemical environment of the surface composition of the samples was recorded by X-ray photoelectron spectroscopy. The electrochemical performance was tested with a three-electrode system in the aqueous electrolyte of 1 M KOH. The electrochemical measurement demonstrated that Fe₂O₃/N-rGO shows a specific capacitance as high as 618 F g^鈥? at a discharge current density of 0.5 A g^鈥?. Even at the current density of 10 A g^鈥?, the specific capacitance is still as high as 350 F g^鈥?. After 5000 cycles, the capacity retention is still maintained at 56.7%.