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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >A novel method to synthesize anatase TiO_2 nanowires as an anode material for lithium-ion batteries
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A novel method to synthesize anatase TiO_2 nanowires as an anode material for lithium-ion batteries

机译:一种合成锐钛矿型TiO_2纳米线作为锂离子电池负极材料的新方法

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摘要

We demonstrate a simple and novel approach for the synthesis of a kind of anatase TiO_2 nanowires. The method is based on a hydrothermal method under normal atmosphere without using the complex Teflon-lined autoclave, high concentrations NaOH solution and long react time. The as-prepared materials are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical measurements. The obtained anatase TiO_2 nanowires show excellent performance. There is a potential plateau at 1.77 and 1.88 V in the process of Li insertion and extraction, and the initial Li insertion/extraction capacities are 283 and 236 mAh g~(-1) at the density of 20 mA g~(-1), respectively. In the 20th cycle, the reversible capacities still remain about 216 and 159 mAh g~(-1) at the current densities of 20 and 200 mAg~(-1), respectively, and the coulombic efficiency is more than 98%, exhibiting excellent electrochemical performance.
机译:我们演示了一种简单而新颖的方法来合成一种锐钛矿型TiO_2纳米线。该方法基于正常环境下的水热法,无需使用内衬聚四氟乙烯的复杂高压釜,高浓度NaOH溶液和较长的反应时间。所制备的材料通过X射线衍射(XRD),扫描电子显微镜(SEM)和电化学测量来表征。所获得的锐钛矿型TiO_2纳米线表现出优异的性能。 Li的插入和抽出过程在1.77和1.88 V处有一个潜在的平稳期,在20 mA g〜(-1)的密度下,初始Li插入/提取容量为283和236 mAh g〜(-1)。 , 分别。在第20个循环中,在20和200 mAg〜(-1)的电流密度下,可逆容量仍分别保持在216和159 mAh g〜(-1)左右,库仑效率超过98%,表现出优异的电化学性能。

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