Conductive silicon oxide powder, preparation thereof, and negative electrode material for non-aqueous electrolyte secondary cell

摘要

A conductive silicon oxide powder in which particles of silicon oxide having the formula: SiOx wherein 1<=x<1.6 are covered on their surfaces with a conductive carbon coating by chemical vapor deposition treatment is useful as a negative electrode active material to construct a lithium ion secondary cell having a high capacity and improved cycle performance.