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.

合成了共掺杂氮/硫的聚吡咯和硫衍生的中空碳纳米纤维，并将其用作钠离子电池 (NIB) 的阳极。X 射线光电子能谱、扫描和隧道电子显微镜证实了中空碳纳米纤维成功掺杂氮和硫。进一步的分析证明，硫掺杂对提高 NIBs 碳基阳极的电化学性能具有重要影响。所获得的N掺杂中空碳纳米纤维和N/S共掺杂中空碳纳米纤维表现出相似的形貌但不同的电化学行为。正如预期的那样，N/S 共掺杂空心碳纳米纤维负极表现出增强的电化学性能，包括高比容量、出色的长期稳定性和良好的速率稳定性。