Li4Ti5O12/TiO2 Hollow Spheres Composed Nanoflakes with Preferentially Exposed Li4Ti5O12 (011) Facets for High-Rate Lithium Ion Batteries

被引：68

作者：

Jiang, Yan-Mei ^{[1
]}

Wang, Kai-Xue ^{[1
]}

Wu, Xue-Yan ^{[2
]}

Zhang, Hao-Jie ^{[1
]}

Bartlett, Bart M. ^{[3
]}

Chen, Jie-Sheng ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, Shanghai 200240, Peoples R China

[3] Univ Michigan, Dept Chem, Ann Arbor, MI 48109 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 22期

基金：

中国国家自然科学基金;

关键词：

Li4Ti5O12/TiO2; composite; nanoflakes; facet control; anode; lithium ion batteries; CARBON-COATED LI4TI5O12; RATE ELECTRODE MATERIAL; HIGH-RATE CAPABILITY; ANODE MATERIAL; ELECTROCHEMICAL PROPERTIES; PERFORMANCE; NANOSHEETS; INSERTION; SPINEL; INTERCALATION;

D O I：

10.1021/am504931r

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Li4Ti5O12/TiO2 hollow spheres composed of nanoflakes with preferentially exposed Li4Ti5O12 (011) facets have been successfully fabricated via a facile hydrothermal processing route and following calcination. These hollow spheres show good electrochemical performance in terms of high capacity (266 mAh g(-1) at 0.1 A g(-1)), and excellent rate capability (110 mAh g(-1) at 4.0 A g(-1) up to 100 cycles), attributed to unique morphology, preferred facet orientation of the nanoflakes and microscopic structure of the hollow spheres. The preferentially exposed Li4Ti5O12 (011) facets leads to fast lithium insertion/deinsertion processes in materials because of shorten lithium ion diffusion length, proved to be highly effective in improving the electrochemical properties of the hollow spheres. The excellent electrochemical performance makes these hollow spheres promising anode material for lithium ion batteries with high power and energy densities.

引用

页码：19791 / 19796

页数：6

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