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>One-step Preparation of Nanoarchitectured TiO2 on Porous Al as Integrated Anode for High-performance Lithium-ion Batteries
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One-step Preparation of Nanoarchitectured TiO2 on Porous Al as Integrated Anode for High-performance Lithium-ion Batteries
Titanium dioxide (TiO2) is an attractive anode material for energy storage devices due to its low-volume-change and high safety. However, TiO2 anodes usually suffer from poor electrical and ionic conductivity, thus causing dramatic degradation of electrochemical performance at rapid charge/discharge rates, which has hindered its use in energy storage devices. Here, we present a novel strategy to address this main obstacle via using nanoarchitectured TiO2 anode consisting of mesoporous TiO2 wrapped in carbon on a tunnel-like etched aluminum substrate prepared by a simple one-step approach. As a result of this nanoarchitecture arrangement, the anode exhibits excellent rate performance and superior cyclability. A rate up to 100 C is achieved with a high specific capacity of about 95 mA h g−1, and without apparent decay after 8,000 cycles.
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机译:二氧化钛(TiO2)体积小,安全性高,是一种用于储能装置的有吸引力的阳极材料。然而,TiO 2阳极通常具有差的电导率和离子电导率,因此导致在快速充电/放电速率下电化学性能急剧下降,这阻碍了其在能量存储装置中的使用。在这里,我们提出一种新颖的策略来解决这一主要障碍,方法是使用纳米结构的TiO2阳极,该阳极由介孔TiO2包裹在碳中形成,该阳极通过简单的一步法制备,呈隧道状蚀刻铝基板。由于这种纳米结构布置,阳极表现出优异的速率性能和优异的循环性。以约95 mA h g -1 sup>的高比电容实现最高100 C的速率,并且在8000次循环后没有明显的衰减。
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