Synthesis and electrochemical behavior of Li[Li0.1Ni0.35-x/2CoxMn0.55-x/2]O2 cathode materials

被引：112

作者：

Kim, JH

Park, CW

Sun, YK ^{[1
]}

机构：

[1] Hanyang Univ, Dept Chem Engn, Seoul 133791, South Korea

[2] Korea Elect Technol Inst, Nano Tech Based Informat & Energy Storage Res Ct, Pyeongtaek 455865, South Korea

来源：

SOLID STATE IONICS | 2003年 / 164卷 / 1-2期

关键词：

layered manganese; Co substitution; cathode; lithium secondary batteries; sol-gel method;

D O I：

10.1016/j.ssi.2003.08.003

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 effect of Co doping in Li[Li-0.1 Ni0.35-x/2COxMn0.55-x/2]O-2 materials on the electrochemical properties has been investigated. Layered Li[Li0.1Ni0.35-x/2CoxMn0.55-x/2]O-2 (x=0-0.3) materials considered to be a solid solution of LiNi0.5Mn0.5O2, LiCoO2, and Li2MnO3 were synthesized using a sol-gel method. The Co doping of x=0.1 showed improved capacity and rate capability comparing to undoped Li[Li0.1Ni0.35Mn0.55]O-2. Area-specific impedance (ASI) and AC impedance measurement show that Co-doped electrode has the lower impedance value during cycling. It is considered that the higher capacity and superior rate capability of Co-doping sample, especially for the Li[Li0.1Ni0.3Co0.1Mn0.5]O-2, would be ascribed to the reduced resistance of the electrode during cycling. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：43 / 49

页数：7

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