Li-CONTAINING SILICON OXIDE POWDER AND PRODUCTION METHOD THEREOF

Abstract

There is produced a Li-containing silicon oxide powder containing a crystallized lithium silicate that is mostly water-insoluble Li2Si2O5 and containing little crystalline Si. This object is attained through the mixing of a lower silicon oxide powder represented by a compositional formula SiOx (0.5<x<1.5) with a powdered lithium source that involves grinding of the powdered lithium source; controlling a median diameter D1 of the lower silicon oxide powder and a median diameter D2 of the powdered lithium source so as to fulfill 0.05≤D2/D1≤2; and calcining the mixed powder at 300° C. or higher and 800° C. or lower.

Dependencies are inferred from the claim text.