COMPOSITE POWDER INCLUDING SILICON OXIDE AND METAL SILICON IN USE OF ANODE MATERIAL FOR SECONDARY BATTERY, AND MANUFACTURING METHOD THEREOF

摘要

Disclosed is a manufacturing method of composite powder including silicon oxide and silicon metal capable of being used as a negative electrode material of a secondary battery. The method comprises the following steps: a first step of producing a porous material by mixing silicon chloride and glycol which is divalent alcohol; a second step of heat-treating the porous material under the inert gas atmosphere to obtain silicon oxide; and a third step of mixing and making the silicon oxide react in a solid phase with the silicon metal to obtain the composite powder. The silicon oxide is denoted by general formula SiOx, and the oxygen content (x) is within the range of 0