Nitrogen-doped carbon nanofibers derived from polyacrylonitrile for use as anode material in sodium-ion batteries
2019/11/27 21:19:19
Zhu, J. D., C. Chen, Y. Lu, Y. Q. Ge, H. Jiang, K. Fu and X. W. Zhang
Nitrogen-doped carbon nanofibers (N-CNFs) derived from polyacrylonitrile were successfully synthesized by a combination of electrospinning and thermal treatment processes. The as-prepared N-CNFs were used as anode material for sodium-ion batteries due to their unique fabric and weakly-ordered turbostratic structure as well as large spacing between graphene layers. Results show that N-CNFs carbonized at 800 degrees C delivered a high reversible capacity of 293 mAh g(-1) at a current density of 50 mA g(-1) in the first cycle. Even though the first-cycle Coulombic efficiency was 64%, it increased to nearly 100% only after a few initial cycles. Additionally, these N-CNFs showed excellent cycling and high-rate performance, and maintained a capacity of up to 150 mAh g(-1) even at an extremely high current density of 1000 mA g(-1) for over 200 cycles. It is, therefore, demonstrated that N-CNFs prepared under appropriate conditions are promising anode material candidate for sodium-ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.
- Journal: Carbon
- Volume: 94
- Issue:
- Pages: 189-195
- ISSN: 0008-6223
- DOI: 10.1016/j.carbon.2015.06.076
- Year: 2015
- Number:
- Type:
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