Patent ID: 7776473
Filing Date: 2010-08-17
Classification: H01M,Y02E

Abstract:
1. A method for preparing a silicon-silicon dioxide-lithium composite, comprising: mixing silicon oxide having the general formula; SiOx wherein 1≦x<1.6 with metallic lithium and/or an organolithium compound as a lithiating agent in an inert gas atmosphere for reaction, whereby the silicon oxide undergoes disproportionation into silicon and silicon dioxide doped with lithium at the same time to form Li wherein said reaction between silicon oxide and metallic lithium and/or the organolithium compound is conducted by feeding the mixture of silicon oxide and metallic lithium and/or the organolithium compound in a jar of a planetary ball mill, operated for milling and reaction, so that the temperature within a jar is controlled at about 40 to 120° C. during the reaction.