A facile N doping strategy to prepare mass-produced pyrrolic N-enriched carbon fibers with enhanced lithium storage properties. (10th July 2018)

• Record Type: Journal Article
• Authors: He, Binhong; Li, Gangyong; Chen, Liang; Chen, Zhengu; Jing, Mingjun; Zhou, Minjie; Zhou, Ningbo; Zeng, Jianhuang; Hou, Zhaohui
• Is Part Of: Electrochimica acta. Volume 278(2018)
• Page Start: 106
• Page End: 113
• Publication Date: 2018-07-10
• Subjects: N-doped -- Carbon fibers -- Pyrrolic N -- Lithium-ion battery; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.05.017
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: 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 (∼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. Graphical abstract: Unique spiral morphology, high defect degree and dominated pyrrolic N endowed PN-CFs with superior cycling stability and rate capability. Image 1 Highlights: PN-CFs were prepared by a facile N doping strategy. PN-CFs showed spiral morphology, high defect degree and dominated pyrrolic N. PN-CFs showed super-long cycling lifespan and superior high-rate capability. PN-CFs were promising LIB anode materials.