High performance LiNi0.5Mn1.5O4 cathode materials synthesized by a combinational annealing method

被引：42
|
作者：
Fang, Haisheng [1 ]
Wang, Zhixing
Zhang, Bao
Li, Xinhai
Li, Guangshe
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, Grad Sch, State Key Lab Struct Chem, Fujian 350002, Peoples R China
[2] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Peoples R China
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2007年 / 9卷 / 05期
关键词：
lithium ion batteries; cathode materials; LiNi0.5Mn1.5O4; high-voltage; annealing treatment;
D O I：
10.1016/j.elecom.2006.12.013
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
High performance LiNi0.5Mn,O-1.5(4) was prepared by a combinational annealing method. All samples were characterized by X-ray diffraction, infrared, and cell measurements. With increasing the annealing time at 600 degrees C, LiNi0.5Mn1.5O4 showed a decreased lattice parameter and an enhanced Ni-ordering. The electrochemical property of LiNi0.5Mn1.5O4 was optimized by controlling the annealing time. It was found that after annealing at 600 degrees C for 8 h, LiNi0.5Mn1.5O4 can discharge up to 138 mA h g(-1) with a superior cycling performance at the rate of 5/7C. High-rate test indicated that. LiNi0.5Mn1.5O4 exhibited excellent electrochemical performance when charged and discharged at 1.2 C and 2.5 C, respectively. The findings reported in this work are expected to pave the way for the practical application of LiNi0.5Mn1.5O4. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：1077 / 1082
页数：6
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