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分级结构的碳/二硫化钼纳米带的制备及其锂电性能研究

艾经伟, 杨尊先, 郭太良

艾经伟, 杨尊先, 郭太良. 分级结构的碳/二硫化钼纳米带的制备及其锂电性能研究[J]. 真空科学与技术学报, 2018, 38(2): 132-139. DOI: 10.13922/j.cnki.cjovst.2018.02.10
引用本文: 艾经伟, 杨尊先, 郭太良. 分级结构的碳/二硫化钼纳米带的制备及其锂电性能研究[J]. 真空科学与技术学报, 2018, 38(2): 132-139. DOI: 10.13922/j.cnki.cjovst.2018.02.10
Ai Jingwei, Yang Zunxian, Guo Tailiang. Synthesis and Li-Ion Storage Properties of Hierarchical C-Coated MoS2 Nanobelts[J]. CHINESE JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY, 2018, 38(2): 132-139. DOI: 10.13922/j.cnki.cjovst.2018.02.10
Citation: Ai Jingwei, Yang Zunxian, Guo Tailiang. Synthesis and Li-Ion Storage Properties of Hierarchical C-Coated MoS2 Nanobelts[J]. CHINESE JOURNAL OF VACUUM SCIENCE AND TECHNOLOGY, 2018, 38(2): 132-139. DOI: 10.13922/j.cnki.cjovst.2018.02.10

分级结构的碳/二硫化钼纳米带的制备及其锂电性能研究

基金项目: 

教育部留学人员回国启动基金 (LXKQ201101)

福建省自然基金项目 (2010J01332)

福州大学校发展基金项目 (2012-XQ-40)

福州大学贵重仪器设备开放测试基金项目 (2018T037)

详细信息
    通讯作者:

    杨尊先,E-mail:yangzunxian@hotmail.com

    郭太良,E-mail:gtl_fzu@yahoo.com.cn

  • 中图分类号: TM912.9

Synthesis and Li-Ion Storage Properties of Hierarchical C-Coated MoS2 Nanobelts

  • 摘要: 以钼粉、过氧化氢 (30%) 、苹果酸、硫脲为原料, 通过连续的水热法-热分解碳包覆, 制备出了分级结构的C@MoS2@C纳米带, 并通过X射线衍射、扫描透射及电化学性能表征方法对该纳米复合材料的形貌结构、组成成分及锂电性能进行测试。研究结果表明, 通过该连续的水热法-热分解碳包覆, 以碳包覆的三氧化钼纳米带为模板, 制备出分级结构的C@MoS2纳米带复合材料, 其MoS2纳米片均匀的负载在碳层表面, 通过再一次简单的热分解碳包覆, 实现了在MoS2表面均匀覆盖一层无定形碳, 得到了三层分级结构的C@MoS2@C纳米带复合材料。通过这种形貌结构的筑造, 极大提高了其作为锂电负极材料的导电性、结构稳定性, 该材料作为锂电负极材料在0.2 A/g的恒流充放电下循环100次后放电比容量达到1025.5m Ah/g, 在1.0 A/g的大电流充放电循环中放电比容量仍然达到820 m Ah/g。
    Abstract: The thin films, comprising hierarchical C-coated MoS2 (C@MoS2@C) nanobelts, were synthesized by continuous hydrothermal-decomposition with reactants of Mo-powder, H2O2 (30%), malic acid and thiourea. The microstructures and Li-ion storage behavior of the C@MoS2@C nanobelts were investigated with X-ray diffraction, scanning electron microscopy, transmission electron microscopy and cyclic voltammetry. The results show that the C@MoS2@C nanobelts with good Li-ion storage capacity can be synthesized by hydrothermal-decomposition. For example, when cycled for 100 times at 0. 2 A/g and 1. 0 A/g, the specific capacity of the rate-capacity of the C@MoS2@C nanobelts was 1025. 5 and 820 m Ahg-1, respectively. The C-coated MoS2 nanobelts can be synthesized by hydrothermal-decomposition decomposition of the C-coated MoO3-precursor; while keeping the nano-structures intact, the Ccoating is capable of promoting MoS2 nano-sheets formation on the surface of C-template, significantly increasing the MoS2-conductivity. The as-synthesized C@MoS2@C films possess high conductivity and structural stability.
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出版历程
  • 收稿日期:  2017-10-24
  • 网络出版日期:  2023-09-14

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