Title :
Sol-gel Synthesis and Electrochemical Properties of LiMn1.8Co0.2O4 Cathode Material
Author :
Lin, Y.B. ; Li, X.W. ; Zhao, G.Y. ; Chen, W. ; Lai, H. ; Huang, Z.G.
Author_Institution :
Dept. of Phys., Fujian Normal Univ., Fuzhou, China
Abstract :
Spinel LiMn1.8Co0.2O4 and LiMn1.2Co0.2Cr0.6O4 compounds were prepared through sol-gel method using citric acid as a chelating agent. The structural and electrochemical properties of cathode compounds were investigated by mean of X-ray diffraction, cyclic voltammetry, galvanostatic charge-discharge test and AC impedance spectra systematically. It is found that the high rate discharge capability of electrodes is distinctly improved by chromium doping, indicating that Cr oxidation stabilized the spinel structure.
Keywords :
X-ray diffraction; chromium compounds; crystal structure; electrochemical electrodes; electrochemical impedance spectroscopy; lithium compounds; manganese compounds; oxidation; secondary cells; sol-gel processing; voltammetry (chemical analysis); LiMn1.2Co0.2Cr0.6O4; LiMn1.8Co0.2O4; X-ray diffraction; ac impedance spectra; cathode material; cyclic voltammetry; electrochemical properties; galvanostatic charge-discharge test; high rate discharge capability; lithium-ion battery; oxidation; sol-gel synthesis; spinel structure; structural properties; Batteries; Cathodes; Chromium; Crystallization; Electrodes; Lithium; Manganese; Ovens; Powders; X-ray diffraction;
Conference_Titel :
Power and Energy Engineering Conference (APPEEC), 2010 Asia-Pacific
Conference_Location :
Chengdu
Print_ISBN :
978-1-4244-4812-8
Electronic_ISBN :
978-1-4244-4813-5
DOI :
10.1109/APPEEC.2010.5448255
