SILICON-CONTAINING AMORPHOUS CARBON MATERIAL, METHOD FOR PRODUCING SAME, AND LITHIUM ION SECONDARY BATTERY

摘要

The present invention provides a silicon-containing amorphous carbon material as an anode material of a lithium ion secondary battery or the like of which the improvement of cycling characteristics is practically possible without a change in volume during charging/discharging. The silicon-containing amorphous carbon material (1) is provided with easily graphitized amorphous carbon (4); silicon oxide particles comprising SiOx (0 < x < 2) are contained in the easily graphitized amorphous carbon; and a gap is formed at the periphery of the silicon oxide particles. The silicon content in the silicon-containing amorphous carbon material (1) is 1-50 wt% inclusive.