| 摘要 |
PURPOSE: A silicon anodal active material is provided to improve conductivity while reducing shrinkability and volume expansion of silicon anodal active material in charging/discharging repetition so that degradation of a battery and a sudden reduction of discharge capacity are suppressed and cycleability and coulombic efficiencies become excellent. CONSTITUTION: A manufacturing method of a silicon anodal active material for alithium secondary battery comprises the steps of: dipping a metallic catalyst (2) on the surface of 'the silicon particle (1) selected from (i) Si, Si-M alloy, and SiO and their combination', and growing a silicon nanostructure (3) from the surface of (ii) 'the silicon particle dipped' in the metallic catalyst. The M in the steps is 'an element selected from groups comprising the transition metal, alkaline earth metal, 2 group, 13 group, group 14 elements, rare-earth materials and their combination', not Si. |
