Patent ID: 6770400
Filing Date: 2004-08-03
Classification: C01B,C01P,H01M,Y02E

Abstract:
A negative electrode material for a nonaqueous electrolyte secondary battery, comprising a lithium-containing composite nitride represented by the formula (1):Li3âˆ’xâˆ’yAyMxN wherein A is at least one selected from the group consisting of alkaline metals, except for lithium, and alkaline earth metals, M is a transition metal, 0.2&lE;x&lE;0.8 and 0.0wherein the negative electrode material comprises core particles made of a lithium-containing composite nitride represented by the formula (2):Li3âˆ’xMxN wherein M is a transition metal and 0.2&lE;x&lE;0.8, and surface layers made of the lithium-containing composite nitride represented by the formula (1) cover said respective core particles.