期刊
ELECTROCHIMICA ACTA
卷 106, 期 -, 页码 320-326出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.05.088
关键词
Lithium-ion batteries; Anode; Nitrogen-doped carbon; Polypyrrole template; Electrochemical performance
资金
- Natural Science Foundation of China [21175050]
- MOST [2011AA11290, 2011DFB70020]
- PCSIRT (Program for Changjiang Scholars and Innovative Research Team in University)
Nitrogen-doped carbon nanofiber webs (N-CNFWs) are prepared by direct pyrolyzation of polypyrrole (PPy) nanofiber webs at 600 degrees C. The structure and morphology of N-CNFWs are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier-transform infrared spectroscopy (FTIR), Raman spectra and elemental analysis. Both the doped N content and the N existing type in carbon, change with the pyrolysis time. As anode material for lithium-ion battery, the N-CNFWs show high capacity and good rate capability. The reversible capacity is up to 668 mAh g(-1) at a current density of 0.1 A g(-1) and 238 mAh g(-1) at 5 A g(-1), which can be ascribed to the nanofiber structure and high nitrogen content. (c) 2013 Elsevier Ltd. All rights reserved.
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