SILICON-BASED FINE PARTICLE/SILICON-CONTAINING POLYMER COMPOSITE AND METHOD OF PRODUCING THE SAME, SiOC STRUCTURE AND METHOD OF PRODUCING THE SAME, NEGATIVE ELECTRODE COMPOSITION USING SiOC STRUCTURE, NEGATIVE ELECTRODE, AND LITHIUM ION SECONDARY BATTERY

摘要

There are provided a material for a negative electrode active material exhibiting a favorable capacity retention rate and Coulomb efficiency, a method of producing the material, a negative electrode composition using the material, a negative electrode, and a secondary battery. A SiOC structure, includes (A) at least one silicon-based fine particles; and (B) a SiOC coating layer containing at least Si (silicon), O (oxygen), and C (carbon) as constituent elements, wherein the at least one silicon-based fine particles are covered with the SiOC coating layer, and the average particle size based on a volume-based particle size distribution is in a range of 1 nm to 999 μm.