Electrochemical properties of LiCrxNi0.5-xMn0.5O2 prepared by co-precipitation method for lithium secondary batteries

被引：10
作者：
Kim, Guk-Tae
Kim, Jong-Uk
Sim, Young-Jae
Kim, Ki-Won
机构：
[1] Gyeongsang Natl Univ, Dept Met & Mat Engn, Jinju 660701, South Korea
[2] Gyeongsang Natl Univ, ITRC Energy Storate & Conserv, Jinju 660701, South Korea
[3] Gyeongsang Natl Univ, Dept Ceram Engn, Jinju 660701, South Korea
[4] Korea Assoc Aids Navigat, Poseung Myeon 451822, Pyeongtaek, South Korea
[5] Gyeongsang Natl Univ, Engn Res Inst, Ctr Adv Mat Res, Jinju 660701, South Korea
来源：
JOURNAL OF POWER SOURCES | 2006年 / 158卷 / 02期
关键词：
LiCrxNi0.5-xMn0.5O2; nanoparticle; co-precipitation; lithium secondary battery; cycling performance; discharge capacity;
D O I：
10.1016/j.jpowsour.2005.10.074
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：
The purpose of this research is to study a new synthesis of LiCrxNi0.5-xMn0.5O2 (x = 0, 0.05 and 0.1) using a co-precipitation method for lithium secondary batteries. Investigations are made of the morphology, cyclic voltammetry and charge-discharge cycling of LiCrxNi0.5-xMn0.5O2/Li cells. The particle size of LiNi0.5Mn0.5O2 has a narrow distribution range from 200 to 300 nm. The peak current of LiCr0.05Ni0.45Mn0.5O2 and LiCr0.1Ni0.4Mn0.5O2 in the 2.7 and 2.9 V regions increases with increasing addition of Cr in LiCrxNi0.5-xMn0.5O2. The discharge capacity of the LiNi0.5Mn0.5O2 electrode is 185 and 150 mAh g(-1) at 1 and 15 cycles, respectively. The fading in capacity of Cr-doped LiNi0.5Mn0.5O2 is less than that of LiNi0.5Mn0.5O2, during cycling. LiCrxNi0.5-xMn0.5O2 cathodes with I M LiPF6 in an ethyl carbonate-dimethyl carbonate (EC-DMC) electrolyte exhibit good cycling performance. (c) 2005 Published by Elsevier B.V.
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页码：1414 / 1418
页数：5
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