Molten salt synthesis of LiNi0.5Mn1.5O4 spinel for 5 V class cathode material of Li-ion secondary battery

被引:254
作者
Kim, JH
Myung, ST
Sun, YK [1 ]
机构
[1] Hanyang Univ, Dept Chem Engn, Seoul 133791, South Korea
[2] Iwate Univ, Dept Chem Engn, Morioka, Iwate 0208551, Japan
关键词
spinel; LiNi0.5Mn1.5O4; cathode; lithium; molten salt method;
D O I
10.1016/j.electacta.2003.07.003
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Well-ordered high crystalline LiNi0.5Mn1.5O4 spinel has been readily synthesized by a molten salt method using a mixture of LiCl and LiOH salts. Synthetic variables on the synthesis of LiNi0.5Mn1.5O4, such as synthetic atmosphere, LiCl salt amount, synthetic temperature, and synthetic time, were intensively investigated. X-ray diffraction (XRD) patterns and scanning electron microscopic (SEM) images showed that LiNi0.5Mn1.5O4 synthesized at 900 and 950degreesC have cubic spinel structure (Fd (3) over barm) with clear octahedral dimension. LiNi0.5Mn1.5O4 spinel phase began to decompose at around 1000degreesC accompanied with structural and morphological degradation. LiNi0.5Mn1.5O4 powders synthesized at 900degreesC for 3 It delivered an initial discharge capacity of 139 mAh/g with excellent capacity retention rate more than 99% after 50 cycles. (C) 2003 Elsevier Ltd. All rights reserved.
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页码:219 / 227
页数:9
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