Paper Title:

Effects of Lattice Defects on Cathode Properties of LiMn2O4 Synthesized at Low Temperatures for Lithium Ion Secondary Battery

Periodical Key Engineering Materials (Volume 388)
Main Theme Electroceramics in Japan XI
Edited by Kazumi Kato, Tadashi Takenaka, Masasuke Takata and Kazuo Shinozaki
Pages 41-44
DOI 10.4028/www.scientific.net/KEM.388.41
Citation Hiroyuki Kaiya et al., 2008, Key Engineering Materials, 388, 41
Online since September, 2008
Authors Hiroyuki Kaiya, Shinya Suzuki, Masaru Miyayama
Keywords Cathode Property, EXAFS, Lattice Defect, LiMn2O4, Lithium Ion Secondary Battery
Price US$ 28,-
Article Preview
View full size
Abstract

Effects of lattice defects on cathode properties of LiMn2O4 synthesized at low temperatures were investigated. LiMn2O4 powders were synthesized by a sol-gel method. The specific capacities of LiMn2O4 decreased from 134 to 81 mAh g-1 with decreasing heating temperature from 750 to 200ºC. X-ray absorption spectroscopy showed that a large amount of lattice defects such as cation vacancies existed and cation mixing occurred in LiMn2O4 calcined at low temperatures. It was found that the low specific capacities of LiMn2O4 calcined at low temperatures were attributed to these lattice defects.