PRODUCTION METHOD FOR CARBON-COATED GRAPHITE PARTICLE, CARBON-COATED GRAPHITE PARTICLE, CATHODE FOR LITHIUM-ION SECONDARY BATTERY, AND LITHIUM-ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a highly safe lithium-ion secondary battery high in capacity and efficiency and excellent in load characteristics.

SOLUTION: The production method for carbon-coated graphite particles comprises heating and mixing a polycyclic aromatic compound with a curing agent and graphite particles, removing unreacted materials and low molecular weight components to obtain graphite particles coated with the aromatic compound, and carbonizing the aromatic compound by baking the coated graphite particles to obtain the low crystallinity carbon-coated graphite particles. Thus, carbon-coated graphite particles wherein graphite particles are coated with a low-crystallinity carbon containing a carbonized polycyclic aromatic compound is obtained.

COPYRIGHT: (C)2004,JPO