Journal
SCIENCE BULLETIN
Volume 63, Issue 2, Pages 126-132Publisher
SCIENCE PRESS
DOI: 10.1016/j.scib.2017.12.024
Keywords
Hollow carbon nanofibers; Nitrogen/sulfur co-doping; Anode; Sodium ion batteries
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Funding
- National Natural Science Foundation of China [51374255, 51302323]
- Program for New Century Excellent Talents in University [NCET-13-0594]
- Research Fund for the Doctoral Program of Higher Education of China [201301621200]
- Natural Science Foundation of Hunan Province, China [14JJ3018]
- Exploration and Innovation Foundation of CSU for Postgraduate [502200568]
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Polypyrrole and sulfur derived hollow carbon nanofibers co-doped with nitrogen/sulfur are synthesized and applied as the anode for Na-ion batteries (NIBs). Successful doping of hollow carbon nanofiber with nitrogen and sulfur is confirmed by X-ray photoelectron spectroscopy, scanning and tunneling electron microscopy. Further analysis certifies that sulfur doping has a significant impact in improving the elecctrochemical performance of the carbon-based anodes for NIBs. The obtained N-doped hollow carbon nanofiber and N/S co-doped hollow carbon nanofiber exhibit similar morphologies but different electrochemical behavior. As expected, the N/S co-doped hollow carbon nanofiber anode exhibits enhanced electrochemical performance, including high specific capacity, outstanding long-term stability, and good rate stability. (C) 2017 Science China Press. Published by Elsevier B.V. and Science China Press. All rights reserved.
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