Yan Xuemei, Liang Shuaitong, Shi Haiting, Hu Yanli, Liu Liyan, Xu Zhiwei
Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage Technology, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
J Colloid Interface Sci. 2021 Feb 1;583:535-543. doi: 10.1016/j.jcis.2020.09.025. Epub 2020 Sep 16.
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 CF bonds decorating nitrogen-enriched electrospinning carbon nanofibers (NCNFs) as a free-standing anode for NIBs. The semi-ionic CF 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 at 0.1 A g and displays excellent long-term stability with reversible specific capacity around 150 mA h g over 2000 cycles at 500 mA g after the rate capability test. Moreover, the presence of semi-ionic CF 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.
通过简单且经济的方法制备更高效的钠离子电池（NIBs）碳质阳极仍然是一项重要的工作。在此，开发了一种等离子体控制方法，用于制备装饰有半离子CF键的富氮静电纺丝碳纳米纤维（NCNFs），作为NIBs的独立阳极。半离子CF键有利于独立电极的快速离子和电子转移，显著提高了NCNFs作为NIBs阳极的倍率性能。优化后的样品在0.1 A g下具有199 mA h g的可逆容量，在倍率性能测试后，在500 mA g下经过2000次循环，显示出优异的长期稳定性，可逆比容量约为150 mA h g。此外，等离子体富氮静电纺丝碳纳米纤维表面存在的半离子CF键可以降低阳极电阻，从而在电化学循环后显示出更稳定的固体电解质界面（SEI）。
