CHARACTERIZATION AND COMPARISON OF ELECTROCHEMICAL PERFORMANCE OF THE SPINEL PHASE LiMn{sub}2O{sub}4 PREPARED BY DIFFERENT METHODS FOR Li-ION BATTERIES

摘要

In order to obtain a highly crystalline fine LiMn{sub}2O{sub}4 spinel, hydrothermal reaction synthesis using supercritical water was conducted. This spinel was also synthesized by using a modified solid state reaction for comparison. The XRD patterns of the LiMn{sub}2O{sub}4 spinels synthesized by different methods are almost identical to the pattern of commercial LiMn{sub}2O{sub}4 spinel. However, the peaks for LiMn{sub}2O{sub}4 synthesized by hydrothermal reaction insupersritical water were shifted slightly to higher angles. The initial capacity of LiMn{sub}2O{sub}4 (Modified Soid State Reaction) is about 120 mAh/g. The initial capacity of the LiMn{sub}2O{sub}4 prepared by hydrothermal reaction in supercritical water is 70 mAh/g.