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Controllable synthesis of TiO2 hierarchical nanostructures and their applications in lithium ion batteries

机译:TiO2分级纳米结构的可控合成及其在锂离子电池中的应用

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In this article, TiO2 hierarchical nanostructures have been successfully fabricated in the Ti(SO4)(2)-CH3COOH system via a simple hydrothermal method. The formation mechanism of the TiO2 hierarchical nanostructures was also investigated in detail, which involved the complex reaction between Ti(SO4)(2) and CH3COOH, hydrolysis of the complex, nucleation and self-assembly of TiO2 nanocrystals and anisotropic growth of these subunits. SO42- plays an important role in the self-assembly of subunits. In addition, controllable synthesis of TiO2 hierarchical nanostructures with tunable size can be realized just by changing experimental parameters, such as reaction time or Ti(SO4)(2) concentration. When used as the anode in lithium ion batteries, these TiO2 hierarchical nanostructures present much higher specific capacity and better rate performances than TiO2 nanoparticles, which are attributed to the stability of the secondary-structure during the charge and discharge processes.
机译:在本文中,已经通过简单的水热方法在Ti(SO4)(2)-CH3COOH系统中成功制备了TiO2分层纳米结构。还详细研究了TiO2分层纳米结构的形成机理,涉及Ti(SO4)(2)和CH3COOH之间的复杂反应,TiO2纳米晶体的复合物水解,成核和自组装以及这些亚基的各向异性生长。 SO42-在亚基的自组装中起重要作用。此外,只需更改实验参数,例如反应时间或Ti(SO4)(2)浓度,就可以实现具有可调尺寸的TiO2分级纳米结构的可控合成。当用作锂离子电池的阳极时,这些TiO2分层纳米结构比TiO2纳米颗粒具有更高的比容量和更好的倍率性能,这归因于二次结构在充电和放电过程中的稳定性。

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