Li-CONTAINING SILICON OXIDE POWER AND METHOD FOR PRODUCING SAME

摘要

Provided is a method for producing a Li-containing silicon oxide powder that comprises crystallized lithium silicate, that is mostly water-insoluble Li2Si2O5, and that comprises little crystalline Si. To this end, a powdered lithium source is finely ground when mixing the powdered lithium source and a low-grade silicon oxide powder represented by the compositional formula SiOx (0.5 < x < 1.5). The median diameter D1 of the low-grade silicon oxide powder and the median diameter D2 of the powdered lithium source satisfy 0.05 ≤ D2/D1 ≤ 2. The mixed powder is fired at 300-800 °C.