LiAlO2-coated LiCoO2 as cathode material for lithium ion batteries

被引：100

作者：

Cao, H ^{[1
]}

Xia, BJ ^{[1
]}

Zhang, Y ^{[1
]}

Xu, NX ^{[1
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Microsyst & Informat Technol, State Key Lab Funct Mat Informat, Shanghai 200050, Peoples R China

来源：

SOLID STATE IONICS | 2005年 / 176卷 / 9-10期

关键词：

lithium ion batteries; cathode materials; coating; LiCoO2;

D O I：

10.1016/j.ssi.2004.12.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

3% LiAlO2-coated LiCoO2 and 3% Al2O3-coated LiCoO2 were prepared from C9H21O3Al, LiOH center dot H2O and LiCoO2 by hydrolyzing and heating technique. XRD, SEM and other various electrochemical measurement methods were used to examine these structural and electrochemical characteristics. XRD results proved that no secondary phase appeared after coating. The LiAlO2-coated LiCoO2 showed a higher specific discharge capacity (170 mA h/g at the first cycle) and an excellent cycling performance (165 mA h/g after 20 cycles) when cycled between 2.8 V and 4.5 V. Cyclic voltammograms curves indicated that LiAlO2-coating didn't suppress the phase transition from hexagonal to monoclinic. The conclusion was different from former literature's reports. (c) 2004 Elsevier B.V. All rights reserved.

引用

页码：911 / 914

页数：4