Synthesis and electrochemical performance of Li4Ti5O12/TiO2/C nanocrystallines for high-rate lithium ion batteries

被引：32

作者：

Zhu, Wenjun ^{[1
]}

Yang, Hui ^{[1
]}

Zhang, Wenkui ^{[2
]}

Huang, Hui ^{[2
]}

Tao, Xinyong ^{[2
]}

Xia, Yang ^{[2
]}

Gan, Yongping ^{[2
]}

Guo, Xingzhong ^{[1
]}

机构：

[1] Zhejiang Univ, Sch Mat Sci & Engn, Hangzhou 310027, Peoples R China

[2] Zhejiang Univ Technol, Coll Mat Sci & Engn, Hangzhou 310014, Zhejiang, Peoples R China

来源：

RSC ADVANCES | 2015年 / 5卷 / 91期

基金：

中国国家自然科学基金;

关键词：

ANODE MATERIAL; REVERSIBLE CAPACITY; HOLLOW SPHERES; HIGH-ENERGY; LONG-LIFE; STORAGE; TIO2; COMPOSITES; MICROSPHERES; NANOSHEETS;

D O I：

10.1039/c5ra12397f

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A Li4Ti5O12/TiO2/carbon (Li4Ti5O12/TiO2/C) nanocrystalline composite has been successfully synthesized by a facile sol-gel method and subsequent calcination treatment. Moreover, pure Li4Ti5O12, Li4Ti5O12/C and Li4Ti5O12/TiO2 composites have also been synthesized for comparison. All the samples present a nanocrystalline structure with a uniform size distribution, and abundant phase interfaces can be detected for the Li4Ti5O12/TiO2 and Li4Ti5O12/TiO2/C composites. Electrochemical measurements demonstrate that the resultant Li4Ti5O12/TiO2/C composite exhibits a superior rate capability and cycle stability in comparison with pure Li4Ti5O12, Li4Ti5O12/C and Li4Ti5O12/TiO2 composites, which can be attributed to a high grain boundary density, abundant phase interfaces and in situ formed carbon, for storing extra lithium ions, enhancing rapid lithium insertion/extraction kinetics and improving the electron transport rate.

引用

页码：74774 / 74782

页数：9

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