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Flexible Sodium-Ion Pseudocapacitors Based on 3D Na2Ti3O7 Nanosheet Arrays/Carbon Textiles Anodes

机译：基于3D Na2Ti3O7纳米片阵列/碳纺织阳极的柔性钠离子伪电容器

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摘要

Flexible energy storage devices are critical components for emerging flexible and wearable electronics. Improving the electrochemical performance of flexible energy storage devices depends largely on development of novel electrode architectures and new systems. Here, a new class of flexible energy storage device called flexible sodium-ion pseudocapacitors is developed based on 3D-flexible Na2Ti3O7 nanosheet arrays/carbon textiles (NTO/CT) as anode and flexible reduced graphene oxide film (GFs) as cathode without metal current collectors or conducting additives. The NTO/CT anode with advanced electrode architectures is fabricated by directly growing Na2Ti3O7 nanosheet arrays on carbon textiles with robust adhesion through a simple hydrothermal process. The flexible GF//NTO/CT configuration achieves a high energy density of 55 Wh kg(-1) and high power density of 3000 W kg(-1). Taking the fully packaged flexible sodium-ion pseudocapacitors into consideration, the maximum practical volumetric energy density and power density reach up to 1.3 mWh cm(-3) and 70 mW cm(-3), respectively. In addition, the flexible GF//NTO/CT device demonstrates a stable electrochemical performances with almost 100% capacitance retention under harsh mechanical deformation.
机译：柔性储能设备是新兴的柔性和可穿戴电子产品的关键组件。改善柔性能量存储设备的电化学性能在很大程度上取决于新型电极体系结构和新系统的开发。在此，基于3D柔性Na2Ti3O7纳米片阵列/碳纤维（NTO / CT）作为阳极，而柔性还原氧化石墨烯薄膜（GFs）作为阴极而没有金属电流的情况下，开发了一种称为柔性钠离子伪电容器的新型柔性储能设备集电器或导电添加剂。具有先进电极结构的NTO / CT阳极是通过在碳纤维织物上直接生长Na2Ti3O7纳米片阵列并通过简单的水热工艺牢固粘合而制成的。灵活的GF // NTO / CT配置可实现55 Wh kg（-1）的高能量密度和3000 W kg（-1）的高功率密度。考虑到完全包装的柔性钠离子伪电容器，最大实际体积能量密度和功率密度分别达到1.3 mWh cm（-3）和70 mW cm（-3）。此外，灵活的GF // NTO / CT装置还显示出稳定的电化学性能，在苛刻的机械变形下具有几乎100％的电容保持率。

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  • 来源
    《Advanced Functional Materials》 |2016年第21期|3703-3710|共8页
  • 作者

    Dong Shengyang; Shen Laifa; Li Hongsen; Pang Gang; Dou Hui; Zhang Xiaogang;

  • 作者单位

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Jiangsu, Peoples R China;

    Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Jiangsu Key Lab Mat & Technol Energy Convers, Nanjing 210016, Jiangsu, Peoples R China;

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