| 摘要 |
<p>The present invention provides a positive electrode material for lithium and lithium-ion secondary cells which exhibits good cycleability, reversible specific capacity, and structural stability. The positive electrode material comprises a lithium multi metal oxide having a spinel structure and described by general formula (I) wherein M?1, M2, ...Mk¿ are at least two cations different than lithium or manganese, selected from the group consisting of alkaline earth metals, transition metals, B, Al, Si, Ga and Ge; X, Y, m¿1?, m2, ...Mk are molar parts with numbers between 0 and 0.2; m1, m2 and Y are greater than 0; Z is a number between -0.1 and 0.2; and wherein the metals M?1, M2, ...Mk¿ and the corresponding molar parts m¿1?, M2, ...mk satisfy the equation and inequality: Y = X + m1 + m2 + ... + mk and (a) wherein V1, V2, ...Vk are the corresponding valence states of the cations M?1, M2, ...Mk¿.</p> |
