High concentration nitrogen doped carbon nanotube anodes with superior Li+ storage performance for lithium rechargeable battery application
High concentration nitrogen doped carbon nanotube anodes with superior Li+ storage performance for lithium rechargeable battery application
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DOI：
10.1016/j.jpowsour.2011.09.024
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发表时间：
2012-01-01
影响因子：
9.2
通讯作者：
Sun, Xueliang
中科院分区：
文献类型：
--
作者：
Li, Xifei;Liu, Jian;Sun, Xueliang
已经开发出一种浮动催化剂化学气相沉积法来合成高浓度氮掺杂的碳纳米管。与原始碳纳米管（CNTs）相比，研究了它们作为锂离子电池（LIBs）阳极的电化学性能。X射线光电子能谱结果表明，氮含量高达16.4 at.%。高分辨率透射电子显微镜显示制备出了竹节状的分隔结构。高浓度氮掺杂碳纳米管（HN - CNTs）的可逆容量约为碳纳米管的两倍：494 mAh g⁻¹对比260 mAh g⁻¹，并且比碳纳米管具有好得多的倍率性能。这种显著优异的电化学性能可能与HN - CNTs用于锂离子电池阳极时的高导电性以及更多的缺陷位点有关。© 2011爱思唯尔公司。保留所有权利。
A floating catalyst chemical vapor deposition method has been developed to synthesize carbon nanotubes doped with a high concentration of nitrogen. Their electrochemical performance as anodes for lithium ion batteries (LIBs) in comparison to pristine carbon nanotubes (CNTs) has been investigated. X-ray photoelectron spectroscopy results indicated that the nitrogen content reaches as high as 16.4 at.%. Bamboo-like compartments were fabricated as shown by high resolution transmission electron microscopy. High concentration nitrogen doped carbon nanotubes (HN-CNTs) show approximately double reversible capacity of CNTs: 494 mAh g(-1) vs. 260 mAh g(-1), and present a much better rate capability than CNTs. The significantly superior electrochemical performance could be related to the high electrical conductivity and the larger number of defect sites in HN-CNTs for anodes of LIBs. (C) 2011 Elsevier B.V. All rights reserved.