Nitridation Br-doped Li4Ti5O12 anode for high rate lithium ion batteries

被引：65
|
作者：
Wang, Jiaqing [1 ]
Yang, Zhenzhong [2 ]
Li, Weihan [1 ]
Zhong, Xiongwu [1 ]
Gu, Lin [2 ]
Yu, Yan [1 ]
机构：
[1] Univ Sci & Technol China, Dept Mat Sci & Engn, CAS Key Lab Mat Energy Convers, Hefei 230025, Anhui, Peoples R China
[2] Chinese Acad Sci, Beijing Lab Electron Microscopy, Inst Phys, Beijing 100190, Peoples R China
来源：
JOURNAL OF POWER SOURCES | 2014年 / 266卷
基金：
中国国家自然科学基金;
关键词：
Li-ion battery; Anode; Li(4)TieO(12); Nitridation; SPINEL LI4TI5O12; RATE CAPABILITY; ELECTROCHEMISTRY; INSERTION; STORAGE; TRANSITION; ELECTRODE;
D O I：
10.1016/j.jpowsour.2014.05.025
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Br-doping Li4Ti5O12 (Li4Ti5O11.7Br0.3) is fabricated by conventional solid state method and shows enhanced cycling performance compared with pristine Li4Ti5O12. After thermal nitridation for 90 min in NH3, the Li4Ti5O11.7Br0.3 electrode exhibits better rate capability and excellent cycling performance. It delivers a reversible capacity of 138 mAh g(-1) and 104 mAh g(-1) after 100 cycles at 10C and 20C, respectively, which is approximately four and seven times higher than those of pristine Li4Ti5O12 at the same current rates. This work indicates the feasibility of improving cycling performance and rate capabilities of Li4Ti5O12 through controlling both surface termination and bulk doping procedures. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：323 / 331
页数：9
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