▎ 摘　　要

NOVELTY - Preparing silicon-carbon composite particles involves providing a carbon scaffold comprising a pore volume having greater than 70% microporosity, heating the porous carbon scaffold to 300-500degreesC, and contacting the carbon scaffold with a silane feedstock gas corresponding to a YCVI less than 0.5, where YCVI=(mole of silane feedstock gas per hour)/(mole of carbon scaffold). XSi of the process is greater than 50%, where XSi=100x(mole of silicon in the silicon-carbon composite)/(mole silane feedstock gas). The mole silicon in the silicon-carbon composite is determined from the silicon content in the silicon-carbon composite by thermogravimetric analysis. The feedstock gas comprises silane and an inert gas selected from nitrogen, hydrogen, argon, and helium. USE - Method for preparing silicon-carbon composite particles for use in energy storage devices such as lithium ion batteries. ADVANTAGE - The porous carbon scaffold allows for desirable properties: (i) carbon porosity provides void volume to accommodate the expansion of silicon during lithiation thus reducing the net composite particle expansion at the electrode level; (ii) the disordered graphene network provides increased electrical conductivity to the silicon for enabling faster charge/discharge rates, (iii) nano-pore structure acts as a template for the synthesis of silicon for dictating its size, distribution, and morphology.