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

fYear

2010

fDate

28-31 March 2010

Firstpage

1

Lastpage

3

Abstract

Spinel LiMn_1.8Co_0.2O₄ and LiMn_1.2Co_0.2Cr_0.6O₄ 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); LiMn_1.2Co_0.2Cr_0.6O₄; LiMn_1.8Co_0.2O₄; 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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APPEEC.2010.5448255

Filename

5448255