Electrochemical property of LiMn2O4 in over-discharged conditions

Abstract

This work studies LiMn2O4 in an over-discharged condition. Electrochemical measurement shows that the LiMn2O 4 electrode undergoes an irreversible electrochemical reduction process where its structure is permanently destroyed during over-discharge. Although LiMn2O4 shows a poor over-discharge durance with a reduction starting at 2.5 V vs. Li/Li+, the galvanostatic test indicates that LiMn2O4 can be considered to be used as a high capacity anode material for lithium ion batteries with an initial charge capacity of 814 mAh · g-1 and 452 mAh · g-1 at the 100th cycle. © 2012 World Scientific Publishing Company.