无机材料学报 ›› 2016, Vol. 31 ›› Issue (6): 575-580.DOI: 10.15541/jim20150409 CSTR: 32189.14.10.15541/jim20150409

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准三维MoS2/graphene复合材料储锂性能研究

梁 培, 邢 淞, 舒海波, 张 琳, 胡陈力   

  1. (中国计量学院 光学与电子科技学院 杭州 310018)
  • 收稿日期:2015-08-28 修回日期:2015-11-11 出版日期:2016-06-20 网络出版日期:2016-05-19
  • 基金资助:
    国家自然科学基金(61006051, 61177050);浙江省科技厅公益技术应用研究(2013C31068);2014浙江省公益性技术应用研究(分析测试)(2014C37042)

Analogous Three-dimensional MoS2/Graphene Composites for Reversible Li Storage

LIANG Pei, XING Song, SHU Hai-Bo, ZHANG Lin, HU Chen-Li   

  1. (College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China)
  • Received:2015-08-28 Revised:2015-11-11 Published:2016-06-20 Online:2016-05-19
  • Supported by:
    National Natural Science Foundation of China (61006051, 61177050);Zhejiang Province Department of Public Welfare Technology Application Research Project (2013C31068);2014 Zhejiang Province Public Welfare Technology Application Research (Analytical Test) Project (2014C37042)

摘要:

本研究以氧化石墨烯为前驱体, 利用钼酸钠和硫脲通过水热法在不同阳离子表面活性剂(C14TAB, C16TAB, C18TAB)的辅助下合成得到MoS2/GF复合结构。XRD和SEM分析表明, MoS2/GF复合材料因阳离子表面活性剂的不同而呈现不同的结构和表面形貌; 电化学性能测试表明其结构和表面形貌对电极的容量、循环稳定性和倍率性能都有较大影响。相比于C16TAB和C18TAB, C14TAB辅助合成的MoS2/GF复合结构具有最高的首次放电容量(955 mAh/g), 50次循环后仍保持751 mAh/g的可逆容量, 而且倍率性能更好。本研究揭示MoS2/GF复合材料电化学性能的提升可归因于其独特的praticle-on-sheet结构以及MoS2与石墨烯之间的协同作用。

关键词: 阳离子表面活性剂, MoS2/GF复合结构, 电化学性能, 锂离子电池

Abstract:

MoS2/GF composites were synthesized by hydrothermal method using graphene oxide (GO), sodium molybdate and thiourea as raw materials with assistance of different cationic surfactants (C14TAB, C16TAB, C18TAB). The investigation of as-prepared samples by X-ray diffraction and scanning electron microscopy demonstrate that the composites have presented different morphologies and microstructures which may be resulted from the cationic surfactants. Electrochemical performances for reversible Li+ storage of the composites reveal that the capacities, cycling stability and rate capability are influenced by different morphologies and microstructures. Comparison to C16TAB and C18TAB assistance, the composite synthesized with C14TAB assistance delivers a high first discharge capacity of 955 mAh/g and reversible capacity of 751 mAh/g after 50 cycles, shoowing excellent rate capability. The improvement in the electrochemical performances of the composites synthesized with C14TAB assistance is attributed to its special particle-on-sheet structure and synergistic interactions between graphene and MoS2.

Key words: cationic surfactants, MoS2/GF composites, electrochemical performances, lithium ion battery

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