| 摘要 |
A lithium secondary battery having a higher energy density and a longer cycle life than conventional batteries is disclosed, which comprises a positive electrode capable of absorbing and desorbing lithium, a non-aqueous electrolyte and a negative electrode capable of absorbing and desorbing lithium, wherein the negative electrode comprises a nitride represented by the general formula: LixAyMezN, where A is boron, silicon or aluminum, Me is at least one element selected from the group consisting of transition metal elements and metal elements of Group IIIB, IVB and VB, and x, y and z satisfy 0<x<3, 0<y<=1, 0<z<=1 and 0<x+y+z<=3.
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