NEGATIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, METHOD FOR PRODUCING CARBON-BASED NEGATIVE ELECTRODE ACTIVE MATERIAL, LITHIUM SECONDARY BATTERY AND USE THEREOF

摘要

Disclosed is a negative electrode for lithium secondary batteries, which contains an active material (A) capable of absorbing/desorbing lithium ions and a binder (B). This negative electrode for lithium secondary batteries is characterized in that the active material (A) is a carbon-based material obtained by using at least one substance selected from the group consisting of petroleum cokes and coal cokes as a raw material, and having an average particle diameter of 1-30 µm and a true density of 1.90-2.00 g/cm3. Also disclosed is a method for producing a carbon-based negative electrode active material comprising (a) a step for pulverizing at least one substance selected from the group consisting of petroleum cokes and coal cokes, (b) a step for controlling particle size, and (c) a step for performing a heat treatment at 900-1900°C in an inert gas atmosphere. This method for producing a carbon-based negative electrode active material is characterized in that the resulting carbon-based negative electrode active material has an average particle diameter of 1-30 µm and a true density of 1.90-2.00 g/cm3.