The Effect of K-Ion on the Electrochemical Performance of Spinel LiMn2O4

被引：10

作者：

Xiong, Lilong ^{[1
,2
]}

Xu, Youlong ^{[1
,2
]}

Xiao, Xiang ^{[1
,2
]}

Wang, Jie ^{[1
,2
]}

Li, Yutao ^{[3
]}

机构：

[1] Xi An Jiao Tong Univ, Minist Educ, Key Lab, Elect Mat Res Lab, Xian 710049, Peoples R China

[2] Xi An Jiao Tong Univ, Int Ctr Dielect Res, Xian 710049, Peoples R China

[3] Univ Texas Austin, Texas Mat Inst, Austin, TX 78712 USA

来源：

ELECTRONIC MATERIALS LETTERS | 2015年 / 11卷 / 01期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

solid state reaction; spinel LiMn2O4; ion conductivity; rate capability; SPRAY-PYROLYSIS METHOD; CATHODE MATERIAL; NANOSTRUCTURED MATERIALS; LITHIUM; BATTERIES; ELECTRODES; STABILITY; LICOO2;

D O I：

10.1007/s13391-014-4245-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spinel LiMn2O4 is regarded as one of the cathode active materials for rechargeable lithium-ion batteries with the most potential. K+-ion modified LiMn2O4 samples are synthesized by solid-state reaction. The SEM analysis shows that the modified samples exhibit uniform particle size distribution and much better crystallinity. The modified sample K1 exhibits ionic diffusion coefficient of 1.43 x 10(-10) cm(-2) s(-1) and 2.04 x 10(-1) cm(-2) s(-1), which is much higher than that of the un-modified spinel LiMn2O4 sample. The electrochemical measurements show that K+-ion modification could effectively reduce the charge transfer resistance, improve the capacity retention and rate capacity of the spinel materials.

引用

页码：138 / 142

页数：5

共 29 条

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