A facile N doping strategy to prepare mass-produced pyrrolic N-enriched carbon fibers with enhanced lithium storage properties

作者：He, Binhong; Li, Gangyong; Chen, Liang^*; Chen, Zhengu; Jing, Mingjun; Zhou, Minjie; Zhou, Ningbo; Zeng, Jianhuang; Hou, Zhaohui^*

来源：Electrochimica Acta, 2018, 278: 106-113.

DOI：10.1016/j.electacta.2018.05.017

• N-doped
• Carbon fibers
• Pyrrolic N
• Lithium-ion battery

Carbon-based nanomaterials with suitable morphology, structure and composition are promising candidates for lithium-ion battery (LIB) anode materials. In this work, the chemical vapor deposition technique followed by a facile gas-solid phase doping strategy is exploited to prepare mass-produced pyrrolic N-enriched carbon fibers (PN-CFs). The effect of N doping on the morphology, structure, composition and LIB performance of PN-CFs is investigated. The results show that intrinsic structure defects existing in raw carbon fibers act as active sites for effective N doping. The obtained PN-CFs possess unique spiral nanofiber morphology, high defect degree and dominated pyrrolic N (similar to 96% for the total doped N), which result in super-long cycling lifespan (370.9 mAh g(-1) at 5 A g(-1) after 1000 cycles) and superior high-rate capability (171.1 mAh g(-1) at 20 A g(-1)) when used as LIB anode material.

• 出版日期2018-7-10
• 单位湖南理工学院; 华南理工大学