Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7998967 | Journal of Alloys and Compounds | 2015 | 31 Pages |
Abstract
Core-shell structure carbon coated ferric oxide nanoparticles (Fe2O3@C) were fabricated by the oxidation of carbon coated iron nanoparticles (Fe@C) prepared by a direct current carbon arc discharge method. Porous activated-Fe2O3@C was prepared by KOH activation of Fe2O3@C at the temperature of 750 °C. X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to characterize the structure and morphology of the Fe2O3@C and activated-Fe2O3@C. The specific surface area and pore size distribution of the samples were also tested. The activated-Fe2O3@C electrodes exhibited good electrochemical performance with a maximum specific capacitance of 612 F gâ1 at the charge/discharge current density of 0.5 A gâ1 with 5 M NaOH electrolyte. After 10,000 cycling DC tests at the charge/discharge current density of 4 A gâ1, a high level specific capacitance of 518 F gâ1 was obtained (90.6% retention of the initial capacity), suggesting excellent long-term cycling stability.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Yipeng Ye, Haiyan Zhang, Yiming Chen, Peng Deng, Zhikun Huang, Liying Liu, Yannan Qian, Yunyong Li, Qingyu Li,