Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5458761 | Journal of Alloys and Compounds | 2017 | 21 Pages |
Abstract
Iron oxide (Fe2O3) has attracted much attention due to their appealing features of high theoretical capacity, abundant and environmentally friendly. However, its poor electronic conductivity and inferior cycling stability have strongly hindered the utilization of its theoretical capacity. Compounding Fe2O3 with carbon materials is considered as an effective strategy to overcome these obstacles. Herein, Fe2O3/NCs composites of Fe2O3 anchored on nitrogen-doped carbon (NCs) derived from polypyrrole/rGO were achieved by a microwave-assisted hydrolysis method. The morphology and component of as-synthesized Fe2O3/NCs were characterized by scanning electron microscopy, transmission electron microscope, X-ray diffraction, Raman spectra and thermogravimetric analysis. Its electrochemical performances were investigated by cyclic voltammetry and galvanostatic charge-discharge, which shown a large discharge capacity of 865.6 mAh gâ1 at the current density of 20 mA gâ1 with an original coulombic efficiency of 66.2%, larger than that of NCs or Fe2O3 electrodes. Moreover, a stable discharge capacity of 720.6 mAh gâ1 has obtained at 100 mA gâ1 over 200 cycles, as well as a capacity of 496.1 mAh gâ1 after 1000 cycles at 500 mA gâ1 with a low capacity fading of about 9.7%, showing excellent rate performance and cycling stability for such Fe2O3/NCs electrodes.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Jianbo Zhu, Liping Wei, Jun Hu, Chutan Xue,