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Improved pseudocapacitive charge storage in highly ordered mesoporous TiO2/carbon nanocomposites as high-performance Li-ion hybrid supercapacitor anodes

机译:作为高性能锂离子混合超级电容器阳极的高度有序介孔TiO2 /碳纳米复合材料中改进的伪电容电荷存储

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A Li-ion hybrid supercapacitor (Li-HSCs), an integrated system of a Li-ion battery and a supercapacitor, is an important energy-storage device because of its outstanding energy and power as well as long-term cycle life. In this work, we propose an attractive material (a mesoporous anatase titanium dioxide/carbon hybrid material, m-TiO _(2) -C) as a rapid and stable Li ~(+) storage anode material for Li-HSCs. m-TiO _(2) -C exhibits high specific capacity (~198 mA h g ~(?1) at 0.05 A g ~(?1) ) and promising rate performance (~90 mA h g ~(?1) at 5 A g ~(?1) ) with stable cyclability, resulting from the well-designed porous structure with nanocrystalline anatase TiO _(2) and conductive carbon. Thereby, it is demonstrated that a Li-HSC system using a m-TiO _(2) -C anode provides high energy and power (~63 W h kg ~(?1) , and ~4044 W kg ~(?1) ).
机译:锂离子混合超级电容器(Li-HSC)是由锂离子电池和超级电容器组成的集成系统,由于其出色的能量和功率以及长期的循环寿命,因此是重要的储能设备。在这项工作中,我们提出了一种有吸引力的材料(介孔锐钛矿型二氧化钛/碳杂化材料,m-TiO _(2)-C)作为Li-HSC的快速且稳定的Li〜(+)存储阳极材料。 m-TiO _(2)-C具有高比容量(在0.05 A g〜(?1)时为〜198 mA hg〜(?1))和有希望的速率性能(在5 A时为〜90 mA hg〜(?1) g〜(?1))具有良好的可循环性,这是由精心设计的具有纳米晶锐钛矿TiO_(2)和导电碳的多孔结构产生的。因此,证明了使用m-TiO _(2)-C阳极的Li-HSC系统提供了高能量和功率(〜63 W h kg〜(?1)和〜4044 W kg〜(?1) )。

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