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
收藏
页码：74774 / 74782
页数：9
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