The quest for getting more efficient carbonous anodes for sodium ion batteries (NIBs) prepared by simple and economical methods continues to be an important endeavor. Herein, a plasma-controlled method is developed for preparing semi-ionic C-F bonds decorating nitrogen-enriched electrospinning carbon nanofibers (NCNFs) as a free-standing anode for NIBs. The semi-ionic C-F bonds are beneficial to the fast ion and electron transfer for a free-standing electrode, which remarkably improves the rate performances of NCNFs as the NIBs anodes. The optimized sample delivers a reversible capacity of 199 mA h g^-1 at 0.1 A g⁻¹ and displays excellent long-term stability with reversible specific capacity around 150 mA h g^-1 over 2000 cycles at 500 mA g^-1 after the rate capability test. Moreover, the presence of semi-ionic C-F bonds on plasma nitrogen-enriched electrospinning carbon nanofibers surfaces can reduce the resistance of the anode, thereby showing a more stable solid electrolyte interphase SEI) after electrochemical cycles.

寻求通过简单且经济的方法制备用于钠离子电池（NIB）的碳质阳极的效率更高，仍然是一项重要的工作。在本文中，开发了一种等离子体控制方法来制备半离子CF键，以装饰富氮的静电纺丝碳纳米纤维（NCNF）作为NIB的独立阳极。半离子CF键有利于独立式电极的快速离子和电子转移，这显着提高了NIB作为阳极的NCNF的速率性能。优化的样品提供199毫安Hg的可逆容量^-1 0.1 A G ^-1，并显示优异的长期稳定性与周围150毫安汞柱可逆比容量^-1超过2000次循环以500mA克^-1经过速率能力测试。此外，在等离子体富氮的电纺碳纳米纤维表面上存在半离子CF键可以降低阳极的电阻，从而在电化学循环后显示出更稳定的固体电解质相间（SEI）。