Cation mixing (Li0.5Fe0.5)2SO4F cathode material for lithium-ion batteries

被引：0
|
作者：
孙洋 [1 ]
刘磊 [1 ]
董金平 [1 ]
张斌 [1 ]
黄学杰 [1 ]
机构：
[1] Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences
来源：
Chinese Physics B | 2011年 / 20卷 / 12期
基金：
国家高技术研究发展计划(863计划);
关键词：
lithium-ion battery; cathode material; triplite; cation mixing;
D O I：
暂无
中图分类号：
TM912 [蓄电池];
学科分类号：
0808 ;
摘要：
We study the crystal structure of a triplite-structured (Li 0.5 Fe 0.5)SO 4 F with full Li + /Fe 2+ mixing.This promising polyanion cathode material for lithium-ion batteries operates at 3.9 V versus Li + /Li with a theoretical capacity of 151 mAh/g.Its unique cation mixing structure does not block the Li + diffusion and results in a small lattice volume change during the charge/discharge process.The calculations show that it has a three-dimensional network for Li-ion migration with an activation energy ranging from 0.53 eV to 0.68 eV,which is comparable with that in LiFePO 4 with only one-dimensional channels.This work suggests that further exploring cathode materials with full cation mixing for Li-ion batteries will be valuable.
引用
收藏
页码：5 / 11
页数：7
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