Title :
Electrochemical study of Si doped LiNixMnyCo(1-x-y)O2 as cathode material for Li-ion secondary battery
Author :
Na, Seong-Hwan ; Kim, Hyun-Soo ; Moon, Seong-In
Author_Institution :
Battery Res. Group, Korea Electrotechnol. Res. Inst., Changwon, South Korea
Abstract :
A new synthetic route of Li[NiMnCo]O2 was contrived and its electrochemical characteristics were enhanced by doping small amount of Si. The newly synthesized Li[NiMnCo]O2 showed the capacity of 175 mAh/g and good cycle life at as high cut-off voltage as 4.5V. Si-doped material showed improved rate capability, specific capacity, and cycle life. It seems that the increased lattice parameters and lowered electrochemical impedance are the main causes for the improvement.
Keywords :
cathodes; cobalt compounds; doping; electric impedance; electrochemical electrodes; lithium compounds; manganese compounds; nickel compounds; secondary cells; silicon; 4.5 V; Li; Li-ion secondary battery; LiNixMnyCo(1-x-y)O2: Si; Si-doped material; battery cycle life; capability; cathode material; electrochemical characteristics; electrochemical impedance; electrochemical study; lattice parameters; specific capacity; synthetic route; Batteries; Cathodes; Conducting materials; Doping; Electrodes; Ethanol; Heat treatment; Powders; Structural engineering; Voltage;
Conference_Titel :
Industrial Electronics Society, 2004. IECON 2004. 30th Annual Conference of IEEE
Print_ISBN :
0-7803-8730-9
DOI :
10.1109/IECON.2004.1433442
