Structure and electrochemical performance of the spinel-LiMn2O4 synthesized by mechanical alloying

In this work, spinel LiMn2O4 powder was synthesized from LiOH·H2O and MnOx by mechanical alloying (MA) for various MA times. The stoichiometry and crystal structure of the spinel were examined and their relation to the electrochemical behavior of the spinel was investigated. In this study, we find that, as a result of MA using stainless steel jar and balls, Fe and Cr contents increased and O content decreased with increasing MA time. The results from electrochemical study show that the stoichiometry of the spinel is closely related to the decreasing of initial discharge capacity and cyclic performance of the spinel.