Patent ID: 8062556
Filing Date: 2011-11-22
Classification: B82Y,C04B,H01M,Y02E,Y10T

Abstract:
1. Si—C nanocomposite material for use in a lithium ion cell, obtained by the method comprising the following steps: a) providing a silicon powder obtained by subjecting a silicon-based gas to a plasma-enhanced chemical vapour deposition (PECVD) technique operating at a pressure comprised between 1 μbar and 1 mbar, or to a CO b) mixing the silicon powder with polyvinyl chloride (PVC), and c) carrying out the pyrolysis of the mixture at a temperature comprised between 750 and 1000° C. under an inert atmosphere for 1 to 8 hours so that silicon particles are embedded in the carbon derived from the pyrolysis of the polyvinyl chloride and the silicon at the end of step c) is in a polymorphous state.