Lithium secondary battery negative electrode material and its manufacturing method

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PROBLEM TO BE SOLVED : To provide a negative electrode material for a lithium secondary battery in which manufacturing is easier than a in conventional technology and superior cycle characteristics are shown while maintaining a high discharge capacity. SOLUTION : This is the negative electrode material for the lithium secondary battery composed of composite powders constituted of a metal A component, a metal B component, a metal C component, an alloy component with the above B component and C component, and a carbon component. (1) The metal A component is at least one kind selected from the group composed of Co, Cr, Fe, Mn, Mo, Nb, Ni, Ti, V, W, Zr, and rare-earth elements. (2) The metal B component is at least one kind selected from the group composed of Ag, Al, Au, Cu, In, Mg, Pd, Pt, Y, and Zn. (3) The metal C component is at least one kind selected from the group composed of Ga, Ge, Sb, Si, and Sn. (4) As for primary particles of the composite powders, 10% or more is within the range of 10-500 nm of perticle diameter. COPYRIGHT : (C)2005, JPO&NCIPI