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Graphene-Based Mesoporous SnO_2 with Enhanced Electrochemical Performance for Lithium-Ion Batteries

机译：增强锂离子电池电化学性能的基于石墨烯的介孔SnO_2

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摘要

Graphene-based metal oxides generally show outstanding electrochemical performance due to the superior properties of graphene. However, the aggregation of active metal oxide nanoparticles on the graphene surface may result in a capacity fading and poor cycle performance. Here, a mesostructured graphene-based SnO_2 composite is prepared through in situ growth of SnO_2 particles on the graphene surface using cetyltrimethylammonium bromide as the structure-directing agent. This novel mesoporous composite inherits the advantages of graphene nanosheets and mesoporous materials and exhibits higher reversible capacity, better cycle performance, and better rate capability compared to pure mesoporous SnO_2 and graphene-based nonporous SnO_2. It is concluded that the synergetic effect between graphene and mesostruc-ture benefits the improvement of the electrochemical properties of the hybrid composites. This facile method may offer an attractive alternative approach for preparation of the graphene-based mesoporous composites as high-performance electrodes for lithium-ion batteries.
机译：石墨烯基金属氧化物通常由于石墨烯的优越性能而显示出优异的电化学性能。然而，活性金属氧化物纳米颗粒在石墨烯表面上的聚集可能导致容量衰减和较差的循环性能。在此，以十六烷基三甲基溴化铵为结构导向剂，通过在石墨烯表面原位生长SnO_2颗粒，制备了介孔结构的石墨烯基SnO_2复合材料。这种新型的介孔复合材料继承了石墨烯纳米片和介孔材料的优点，与纯介孔SnO_2和基于石墨烯的无孔SnO_2相比，具有更高的可逆容量，更好的循环性能和更好的倍率性能。结论是石墨烯与介观结构之间的协同作用有利于杂化复合材料电化学性能的改善。这种简便的方法可以为制备基于石墨烯的介孔复合材料作为锂离子电池的高性能电极提供有吸引力的替代方法。

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  • 来源
    《Advanced Functional Materials》 |2013年第28期|3570-3576|共7页
  • 作者

    Sheng Yang; Wenbo Yue; Jia Zhu; Yu Ren; Xiaojing Yang;

  • 作者单位

    Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875, P. R. China;

    Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875, P. R. China;

    Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875, P. R. China;

    National Institute of Clean-and-low-carbon Energy Beijing, 102209, P. R. China;

    Beijing Key Laboratory of Energy Conversion and Storage Materials College of Chemistry Beijing Normal University Beijing 100875, P. R. China;

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