Studies on the Li---Mn---O spinel system (obtained from melt-impregnation method) as positive electrodes for 4 V lithium batteries. Part III. 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.