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Heterogeneous TiO2/V2O5/Carbon Nanotube Electrodes for Lithium-Ion Batteries

机译:用于锂离子电池的异质TiO2 / V2O5 /碳纳米管电极

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摘要

Vanadium pentoxide (V2O5) is proposed and investigated as a cathode material for lithium -ion (Li -ion) batteries. However, the dissolution of V2O5 during the charge/discharge remains as an issue at the V2O5 electrolyte interface. In this work, we present a heterogeneous nanostructure with carbon nanotubes supported V2O5/titanium dioxide (TiO2) multilayers as electrodes for thin-film Li -ion batteries. Atomic layer deposition of V2O5 on carbon nanotubes provides enhanced Li storage capacity and high rate performance. An additional TiO2 layer leads to increased morphological stability and in return higher electrochemical cycling performance of V2O5/carbon nanotubes. The physical and chemical properties of TiO2/V2O5/carbon nanotubes are characterized by cyclic voltammetry and charge/discharge measurements as well as electron microscopy. The detailed mechanism of the protective TiO2 layer to improve the electrochemical cycling stability of the V2O5 is unveiled.
机译:提出并研究了五氧化二钒(V2O5)作为用于锂 - IION(LIION)电池的阴极材料。然而,在电荷/放电期间V2O5的溶解仍然是V2O5电解质界面的问题。在这项工作中,我们呈现一种具有碳纳米管的异质纳米结构,其中负载V2O5 /二氧化钛(TiO 2)多层作为薄膜Li-on电池的电极。碳纳米管上V2O5的原子层沉积提供增强的锂储存能力和高速率性能。另外的TiO 2层导致形态学稳定性增加,并且在v2O5 /碳纳米管的返回更高的电化学循环性能。 TiO2 / V2O5 /碳纳米管的物理和化学性质的特征在于循环伏安法和充电/放电测量以及电子显微镜。保护性TiO2层以改善V2O5的电化学循环稳定性的详细机制。

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