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首页> 外文期刊>Advanced Functional Materials >A Lyotropic Liquid-Crystal-Based Assembly Avenue toward Highly Oriented Vanadium Pentoxide/Graphene Films for Flexible Energy Storage
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A Lyotropic Liquid-Crystal-Based Assembly Avenue toward Highly Oriented Vanadium Pentoxide/Graphene Films for Flexible Energy Storage

机译：溶致液晶的组装大道，面向高度定向的五氧化二钒/石墨烯薄膜，用于柔性储能

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摘要

A novel lyotropic liquid-crystal (LC) based assembly strategy is developed for the first time, to fabricate composite films of vanadium pentoxide (V2O5) nanobelts and graphene oxide (GO) sheets, with highly oriented layered structures. It is found that similar lamellar LC phases can be simply established by V2O5 nanobelts alone or by a mixture of V2O5 nanobelts and GO nanosheets in their aqueous dispersions. More importantly, the LC phases can be retained with any proportion of V2O5 nanobelts and GO, which allows facile optimization of the ratio of each component in the resulting films. Named VrGO, composite films manifest high electrical conductivity, good mechanical stability, and excellent flexibility, which allow them to be utilized as high performance electrodes in flexible energy storage devices. As demonstrated in this work, the VrGO films containing 67 wt% V2O5 exhibit excellent capacitance of 166 F g(-1) at 10 A g(-1); superior to those of the previously reported composites of V2O5 and nanocarbon. Moreover, the VrGO film in flexible lithium ion batteries delivers a high capacity of 215 mAh g(-1) at 0.1 A g(-1); comparable to the best V2O5 based cathode materials.
机译：首次开发了一种新型的基于溶致液晶（LC）的组装策略，以制造具有高度取向的层状结构的五氧化二钒（V2O5）纳米带和氧化石墨烯（GO）片的复合膜。发现可以通过单独的V2O5纳米带或通过V2O5纳米带和GO纳米片在其水分散液中的混合物简单地建立相似的层状LC相。更重要的是，LC相可以用任意比例的V2O5纳米带和GO保留，这可以轻松优化所得膜中每种组分的比例。复合膜名为VrGO，具有高导电性，良好的机械稳定性和出色的柔韧性，可将其用作柔性储能装置中的高性能电极。如这项工作所示，含有67 wt％V2O5的VrGO膜在10 A g（-1）时表现出166 F g（-1）的出色电容；优于先前报道的V2O5和纳米碳的复合材料。此外，柔性锂离子电池中的VrGO膜在0.1 A g（-1）时可提供215 mAh g（-1）的高容量；与最好的基于V2O5的阴极材料相当。

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  • 来源
    《Advanced Functional Materials》 |2017年第12期|1606269.1-1606269.7|共7页
  • 作者

    Liu Haiqing; Tang Yanping; Wang Chi; Xu Zhixiao; Yang Chongqing; Huang Tao; Zhang Fan; Wu Dongqing; Feng Xinliang;

  • 作者单位

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China|Jiaxing Univ, Coll Biol Chem Sci & Engn, Jiaxing 314001, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China;

    Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China|Tech Univ Dresden, Fachrichtung Chem & Lebensmittelchem, D-01062 Dresden, Germany;

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