One-step synthesis of nickel sulfide/N-doped graphene composite as anode materials for lithium ion batteries
One-step synthesis of nickel sulfide/N-doped graphene composite as anode materials for lithium ion batteries
复制标题
一步合成锂离子电池负极材料硫化镍/氮掺杂石墨烯复合材料
DOI：
10.1016/j.jelechem.2014.10.035
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发表时间：
2015-02-15
影响因子：
4.5
通讯作者：
Ni, Shi-Bing
中科院分区：
文献类型：
--
作者：
Tao, Hua-Chao;Yang, Xue-Lin;Ni, Shi-Bing
通过同时水热法合成了硫化镍/氮掺杂石墨烯复合材料作为高性能负极材料。通过场发射扫描电子显微镜、透射电子显微镜、X射线衍射、拉曼光谱、傅里叶变换红外光谱、X射线光电子能谱和电化学测量等手段研究了硫化镍/氮掺杂石墨烯复合材料的形貌、结构和电化学性能。长度约为500 nm、直径为100 nm的硫化镍粘附在N掺杂石墨烯基体上。硫化镍/N掺杂石墨烯复合材料作为锂离子电池负极材料表现出较高的可逆容量和良好的循环稳定性。良好的电化学性能可归因于N掺杂石墨烯，它提高了复合材料的电子电导率并抑制了作为弹性基体的体积效应。硫化镍的一维结构有利于锂离子和电子的扩散。 (C) 2014 Elsevier B.V. 保留所有权利。
Nickel sulfide/N-doped graphene composite as high performance anode materials has been synthesized through a simultaneous hydrothermal method. The morphology, structure and electrochemical performance of nickel sulfide/N-doped graphene composite were investigated by field emission scanning electron microscopy, transmission electron microscope, X-ray diffraction, Raman spectra, Fourier transform infrared spectra, X-ray photoelectron spectroscopy and electrochemical measurements. The nickel sulfide with a length of about 500 nm and diameter of 100 nm clung to the N-doped graphene matrix. The nickel sulfide/N-doped graphene composite exhibits a relatively high reversible capacity and good cycling stability as anode materials for lithium ion batteries. The good electrochemical performance can be attributed to N-doped graphene, which improves the electronic conductivity of composite and suppresses the volume effect as elastic matrix. The one-dimensional structure of nickel sulfide facilitates the diffusion of lithium ions and electrons. (C) 2014 Elsevier B.V. All rights reserved.