Effects on surface modification of spinel LiMn2O4 material for lithium-ion batteries

被引：26

作者：

Lee, CW ^{[1
]}

Kim, HS ^{[1
]}

Moon, SI ^{[1
]}

机构：

[1] KERI, Battery Res Grp, Adv Mat & Applicat Res Lab, Chang Won 641120, South Korea

来源：

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2005年 / 123卷 / 03期

关键词：

spinel; elevated temperature performance; Li-ion batteries; AC impedance;

D O I：

10.1016/j.mseb.2005.08.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Surface modification effects of the spinel LiMn2O4 cathode by a LiCoO2 precursor solution have been studied in terms of electrochemical performance and impedance response. The LiCoO2 -modified LiMn2O4 cathode shows superior capacity retention of 91% than does the as-received LiMn2O4 (74% of capacity retention) after the 1st storage at 55 degrees C. AC impedance spectra of the LiCoO2-modified sample, in case of the after storage, show significantly improved impedance behaviors when compared with that of the as-received sample. Hence, the LiCoO2,-modified LiMn2O4 cathode helps in improving the electrochemical cycling stability, especially in periodic storage at elevated temperature. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：234 / 237

页数：4

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