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首页> 外文期刊>Advanced Functional Materials >Layered H-2Ti_6O_(13)-Nanowires: A New Promising Pseudocapacitive Material in Non-Aqueous Electrolyte
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Layered H-2Ti_6O_(13)-Nanowires: A New Promising Pseudocapacitive Material in Non-Aqueous Electrolyte

机译：层状H-2Ti_6O_（13）-纳米线：非水电解质中一种有希望的新型伪电容材料

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摘要

Layered H-2Ti_6O_(13)-nanowires are prepared using a facile hydrothermal method and their Li-storage behavior is investigated in non-aqueous electrolyte. The achieved results demonstrate the pseudocapacitive characteristic of Li-storage in the layered H-2Ti_6O_(13)-nanowires, which is because of the typical nanosize and expanded interlayer space. The as-prepared H-2Ti_6O_(13)-nanowires have a high capacitance of 828 F g~(-1) within the potential window from 2.0 to 1.0 V (vs. Li/Li+). An asymmetric supercapacitor with high energy density is developed successfully using H-2Ti_6O_(13)-nanowires as a negative electrode and ordered mesoporous carbon (CMK-3) as a positive electrode in organic electrolyte. The asymmetric supercapacitor can be cycled reversibly in the voltage range of 1 to 3.5 V and exhibits maximum energy density of 90 Wh kg~(-1), which is calculated based on the mass of electrode active materials. This achieved energy density is much higher than previous reports. Additionally, H-2Ti_6O_(13)// CMK-3 asymmetric supercapacitor displays the highest average power density of 11 000 W kg~(-1). These results indicate that the H-2Ti_6O_(13)//CMK-3 asymmetric supercapacitor should be a promising device for fast energy storage.
机译：采用一种简便的水热法制备了层状的H-2Ti_6O_（13）-纳米线，并研究了其在非水电解质中的锂存储行为。所得结果证明了层状H-2Ti_6O_（13）-纳米线中Li存储的伪电容特性，这是由于典型的纳米尺寸和扩展的层间空间。制备好的H-2Ti_6O_（13）-纳米线在2.0至1.0 V（vs. Li / Li +）的电势窗口内具有828 F g〜（-1）的高电容。以H-2Ti_6O_（13）-纳米线为负极，有机电解质中有序介孔碳（CMK-3）为正极，成功开发了具有高能量密度的不对称超级电容器。非对称超级电容器可以在1至3.5 V的电压范围内可逆循环，并具有90 Wh kg〜（-1）的最大能量密度，这是根据电极活性材料的质量计算得出的。实现的能量密度比以前的报告要高得多。另外，H-2Ti_6O_（13）// CMK-3不对称超级电容器表现出最高的平均功率密度11000 W kg〜（-1）。这些结果表明，H-2Ti_6O_（13）// CMK-3不对称超级电容器应该是用于快速储能的有前途的设备。

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  • 来源
    《Advanced Functional Materials》 |2012年第24期|5185-5193|共9页
  • 作者

    Yonggang Wang; Zhensheng Hong; Mingdeng Wei; Yongyao Xia;

  • 作者单位

    Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Fudan University Shanghai 200433, P. R. China;

    Institute of New Energy Technology and Nano-Materials and National Engineering Research Center for Chemical Fertilizer Catalyst Fuzhou University Fuzhou, Fujian 350002, P. R. China;

    Institute of New Energy Technology and Nano-Materials and National Engineering Research Center for Chemical Fertilizer Catalyst Fuzhou University Fuzhou, Fujian 350002, P. R. China;

    Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials Institute of New Energy Fudan University Shanghai 200433, P. R. China;

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