PREPARATION METHODS OF POROUS SILICONE AND NANOSIZED SILICONE PARTICLES AND APPLICATION THEREOF AS NEGATIVE ELECTRODE MATERIAL OF LITHIUM SECONDARY BATTERY

摘要

PURPOSE: Preparation methods of porous silicone and nanosized silicone particles are provided to simplify the production process and the side-products treatment, and reduce the production cost, by using alkali or alkali earth metals as a reducing agent without using toxic hydrogen fluoride. When using the porous silicone as a negative electrode material, long-term stability in battery performance and decrease in electric resistance in the electrode are provided. CONSTITUTION: The preparation method of porous silicone comprises mixing an alkali metal or alkali earth metal powder with a silicone precursor powder, and heating the mixture under inert atmosphere. The preparation method of silicone particles comprises dispersing the porous silicone particles obtained by the above-mentioned method, into a solvent, and sonicating the dispersion. The lithium secondary battery using the porous silicone or the silicone particles comprises a collector made of metal, and an active material for a negative electrode containing the porous silicone or the silicone particles.