LiAlxCo1-xO2 as 4 V cathodes for lithium ion batteries

被引:33
作者
Huang, HT
Rao, GVS
Chowdari, BVR
机构
[1] Natl Univ Singapore, Inst Mat Res & Engn, Singapore 119260, Singapore
[2] Natl Univ Singapore, Dept Phys, Singapore 119260, Singapore
关键词
lithium ion batteries; cathodes; aluminium; cobalt;
D O I
10.1016/S0378-7753(99)00249-9
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
Nominal LiAlxCo1-xO2 with x ranging from 0.1 to 0.3 was prepared by heating mixture of Al(OH)(3), Co3O4 and LiOH at 750 degrees C in air. The effect of substitution of non-transition metal, Al, in LiCoO2 is investigated as a 4 V cathode for Lithium ion. X-ray diffraction (XRD) indicates formation of a single phase (R (3) over bar m) within this range of substitution. When cycled between 4.5 and 2.5 V vs. Li/Li+ ta current density of 1 mA cm(-2), the LiAl0.15Co0.85O2 cathode exhibits reversible capacity of 160 mA h g(-1) initially. XRD of the cathode made at the end of 10 cycles reveals no significant change on host structure. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:690 / 695
页数:6
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