| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of manufacturing an active material used for a negative electrode for a non-aqueous electrolyte secondary battery, prevented in exfoliation of the active material from a collector, assuring collecting property of the active material even if repeating charge/discharge, having a high charge/discharge efficiency, and improving the cycle life. SOLUTION: Particles of silicon, tin or these compounds and ultra-fine particles of a metal with a D<SB>50</SB>value of less than 100μm are mixed and pulverized simultaneously to obtain their mixed particles. The metal is more than one or more kinds of elements selected from the group consisting of Ag, Cu, Ni, Co, Fe, Cr, Zn, B, Al, Ge, Sn (excluding for the case where the other particle of the mixed particle is of tin or its compound), Si (excluding for the case where the other particle of the mixed particle is of silicon or its compound), In, V, Ti, Y, Zr, Nb, Ta, W, La, Ce, Pr, Pd and Nd. COPYRIGHT: (C)2005,JPO&NCIPI
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