Advanced energy storage device: a hybrid BatCap system consisting of battery-supercapacitor hybrid electrodes based on Li4Ti5O12-activated-carbon hybrid nanotubes
Advanced energy storage device: a hybrid BatCap system consisting of battery-supercapacitor hybrid electrodes based on Li4Ti5O12-activated-carbon hybrid nanotubes
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DOI：
10.1039/c2jm32841k
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发表时间：
2012-01-01
影响因子：
--
通讯作者：
Park, Chong Rae
中科院分区：
文献类型：
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作者：
Choi, Hong Soo;Im, Ji Hyuk;Park, Chong Rae
电池-超级电容器混合电极由法拉第可充电电池组件和非法拉第可充电超级电容器组件组成，在单个电极中，成功地开发了在用于先进能量存储装置的负极中使用Li 4 Ti 5 O 12-活性碳（LTO-AC）混合纳米管。Li 4 Ti 5 O 12和聚乙烯醇衍生的活性炭通过原位溶胶-凝胶反应结合静电纺丝，然后通过水热反应和适当的热处理与一维（1D）管状结构的形态控制杂交。制备的LTO-AC混合纳米管作为用于锂离子可再充电电池的阳极材料在各种充电-放电速率下进行测试，所述锂离子可再充电电池在1.0-2.5 V vs. Li/Li+的电势范围内在100-4000 mA g（-1）充电-放电速率下提供128-84 mA h g（-1）范围内的比容量。杂化的LTO-AC杂化纳米管电极被包括在一种新型的混合储能电池中，表示为BatCap，作为使用商业化活性炭（AC）作为正电极的负电极。混合BatCap电池表现出32 W h kg（-1）的高能量密度和6000 W kg（-1）的高功率密度，与典型的AC对称电容器的性质相当。
The battery-supercapacitor hybrid electrode, consisting of both faradaic rechargeable battery components and non-faradaic rechargeable supercapacitor components in a single electrode, is successfully developed using Li4Ti5O12-activated carbon (LTO-AC) hybrid nanotubes in a negative electrode for an advanced energy storage device. Li4Ti5O12 and PVA-derived activated carbon are hybridized with morphological control over the one-dimensional (1D) tubular structures via an in situ sol-gel reaction combined with electrospinning, followed by a hydrothermal reaction and appropriate heat treatment. The prepared LTO-AC hybrid nanotubes are tested at a variety of charge-discharge rates as anode materials for use in lithium-ion rechargeable batteries that deliver a specific capacity in the range of 128-84 mA h g(-1) over a 100-4000 mA g(-1) charge-discharge rate in the potential range 1.0-2.5 V vs. Li/Li+. The hybridized LTO-AC hybrid nanotubes electrode is included in a new type of hybrid energy storage cell, denoted as BatCap, as the negative electrode using commercialized activated carbon (AC) as the positive electrode. The hybrid BatCap cell exhibits a high energy density of 32 W h kg(-1) and a high power density of 6000 W kg(-1), comparable to the properties of a typical AC symmetric capacitor.