Studies on the Li-Mn-O spinel system (obtained from melt-impregnation method) as positive electrodes for 4 V lithium batteries .3. Characterization of capacity and rechargeability

A series of 'lithium-rich' or 'oxygen-rich' spinel compounds are prepared from the reaction of LiNO3 with electrochemically prepared manganese dioxide (EMD) via the melt-impregnation method. The capacity and rechargeability of these compounds are semi-quantitatively discussed in terms of an LiMn2O4-Li4Mn5O12-Li2Mn4O9 phase diagram. The capacity decreases as the Lithium or oxygen content increases in the spinel matrix. By contrast, the rechargeability is improved.