METHOD FOR MANUFACTURING AN AMORPHOUS CARBON COMPOSITE NEGATIVE ELECTRODE MATERIAL FOR A LITHIUM-ION SECONDARY BATTERY, AND AMORPHOUS CARBON COMPOSITED NEGATIVE ELECTRODE MATERIAL MANUFACTURED THEREBY

摘要

The present invention relates to a method for manufacturing an amorphous carbon composite negative electrode material for a lithium-ion secondary battery, and to an amorphous carbon composite negative electrode material manufactured thereby. According to the method for manufacturing the amorphous carbon composite negative electrode material for the lithium-ion secondary battery, an intermetallic compound and a transition metal oxide active material are composited with an amorphous carbon without affecting structural and physical properties by means of low-temperature pyrolysis and heat-treatment processes. The amorphous carbon composite negative electrode material manufactured by the method according to the present invention expands in volume only minimally when coupled to lithium and has superior lithium ion conductivity and electron conductivity. Further, even when the secondary battery is charged and discharged several tens of times, the amorphous carbon composite negative electrode material may have a superior discharge capacity retention rate when compared to that of a conventional amorphous carbon composite negative electrode material for a lithium-ion secondary battery. Further, the method for manufacturing the amorphous carbon composite negative electrode material for the lithium-ion secondary battery may be widely utilized for electrode materials for secondary batteries and for improving physical properties of other nanomaterials.