| 摘要 |
The present invention relates to a method for manufacturing Si-Co alloy powder for an anode active material of a secondary battery and, more specifically, to a method for manufacturing Si-Co alloy powder for an anode active material of a secondary battery, comprising the steps of: (a) forming molten metal by melting a composition for Si-Co alloy including 50-70 wt% of silicon (Si) and 30-50 wt% of cobalt (Co) using plasma arc; (b) forming rapidly solidified short whisker alloy powder by allowing the molten metal to be in contact with a rapidly cooling rotor while dropping the molten metal; and (c) pulverizing the short whisker alloy powder. The method for manufacturing Si-Co alloy powder using a rapid cooling method via melting and rotation can enable Si-Co alloy, which is technically very difficult to produce, to be mass-produced via a simple process. Also, manufactured Si-Co alloy powder is a binary mixture and can be used usefully by supplanting a traditional anode active material as the manufactured Si-Co alloy power has a capacity of 703-1020 mAh/g, which is three times as high as 372 mAh/g that is the theoretical capacity of highly crystalline carbon currently used commonly as an anode active material, and exhibits excellent initial efficiency of 80% or higher. |
