Rapid and facile synthesis of hierarchically mesoporous TiO2–B with enhanced reversible capacity and rate capability†,Journal of Materials Chemistry A

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Rapid and facile synthesis of hierarchically mesoporous TiO2–B with enhanced reversible capacity and rate capability†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-12-15 00:00:00 , DOI: 10.1039/c7ta09264d
Yubin Liu _{1,

2,

3,

4,

5} , Minghuang Guo _{1,

2,

3,

4,

5} , Zhenwei Liu _{1,

2,

3,

4,

5} , Qiaohua Wei _{2,

3,

4,

5} , Mingdeng Wei _{1,

2,

3,

4,

5}

Affiliation

In the present work, a rapid and facile synthetic route has been developed to fabricate hierarchically mesoporous TiO₂–B composed of nanosized primary particles (∼7 nm) for the first time. Such a synthetic route is much simpler than the conventional multistep route involving the synthesis of an alkali metal titanate, an ion-exchange reaction and subsequent calcination process. The synthesized material was characterized using X-ray diffraction (XRD), Raman spectroscopy, scanning and transmission electron microscopy (SEM/TEM) and nitrogen adsorption–desorption measurements. When used as an anode for lithium ion batteries, this material exhibited a high reversible capacity, good rate capability and long-term cycling stability. For instance, a high capacity of 202.3 mA h g⁻¹ can be reached after 100 cycles at a current density of 5C. These excellent electrochemical properties might be attributed to the unique crystal structure and hierarchical characteristics of the material.

中文翻译：

快速且容易地合成具有增强的可逆容量和速率能力的分级介孔TiO ₂ -B †

在目前的工作中，已开发出一种快速而简便的合成途径来首次制造由纳米级初级粒子（约7 nm）组成的分级介孔TiO ₂ -B。这样的合成路线比涉及碱金属钛酸酯的合成，离子交换反应和随后的煅烧过程的常规多步路线简单得多。使用X射线衍射（XRD），拉曼光谱，扫描和透射电子显微镜（SEM / TEM）以及氮吸附-解吸测量对合成材料进行了表征。当用作锂离子电池的负极时，该材料具有高可逆容量，良好的倍率容量和长期循环稳定性。例如，高容量为202.3 mA hg ^-1在5C的电流密度下经过100个循环后可以达到最大电流。这些优异的电化学性能可能归因于材料的独特晶体结构和分层特性。

更新日期：2017-12-15

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