| abstract |
The present invention provides a composite and a SiOC structure and a method for producing the same, a material for a negative electrode active material exhibiting good capacity retention and coulombic efficiency, a method for producing the material, and a composition for negative electrode using the material , negative electrode and secondary battery. A SiOC structure comprising: (A) at least one silicon-based fine particle; and (B) a SiOC coating layer containing at least Si (silicon), O (oxygen), and C (carbon) as constituent elements, the at least one silicon-based fine particle Coated by the SiOC coating layer, the average particle diameter based on the volume-based particle size distribution is in the range of 1 nm to 999 μm. |