SILICON-BASED ACTIVE MATERIAL PARTICLES FOR SECONDARY BATTERY AND METHOD FOR PRODUCING SAME

• Main Authors: SONG, Eui Joon, KANG, Sung Hwan, CHEONG, Min Young, LEE, Jong Hun, CHO, Young Tai, PARK, Jee Hye, PARK, Seung Chul, PARK, Seon, SEO, Hee Young, YANG, Tae Jin, CHOI, Yong Gil
• Format: Patent
• Language: English; French; German
• Published: 22.01.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The present invention relates to a method for producing silicon-based active material particles for a secondary battery and silicon-based active material particles. A method for producing silicon-based active material particles for a secondary battery according to an embodiment of the present invention may comprise: a step of providing silicon powder; a step of providing a pre-pulverization mixture in which the silicon powder is dispersed in a solvent for dispersion comprising an antioxidant; a step of applying mechanical compression and shear stress to the silicon powder of the pre-pulverization mixture to refine the silicon powder, thereby forming silicon particles having an oxygen content controlled by the antioxidant; and a step of drying the resulting material comprising the silicon particles to obtain silicon-based active material particles.