Recent developments of materials for rechargeable lithium batteries are highlighted. The reactions using advanced batteries consist of lithium ion insertion into and extraction from a solid matrix without the destruction of core structures, (called topotactic reaction) enable us to study systematically battery materials. By applying a hard-sphere model the optimum chemical composition and element in terms of volumetric capacity in Ah.cm-3 are indicated to be square MeO2 or LiMeO2 (Me = transition metal elements). The calculated values, assuming one electron transfer per a transition metal ion, are in the range 1.15-1.5 Ah.cm-3 for both square MeO2 and LiMeO2 using available structural data, which is alone merely attainable using transition metal dioxides. The approximate operating voltages for the reaction Li + square MeO2 reversible LiMeO2 are pictured against the number of d-electrons. The order of operating voltages of transition metal (di) oxides is approximately; 3d>4d>5d and d(n)

Keywords:LITHIUM NONAQUEOUS CELL;MANGANESE-DIOXIDE;INTERCALATION COMPOUNDS;ELECTROCHEMISTRY;CHEMISTRY;REDUCTION;LINIO2;MNO2

[Referenced By]