Intercalation of silicon and/or tin into porous carbon substrates

摘要

The invention relates to a process for producing an electrically conductive, porous, silicon- and/or tin-containing carbon material which is suitable in particular for the production of an anode material, preferably for lithium ion batteries; in a first step of the process, preferably crystalline silicon nanoparticles and/or tin nanoparticles and/or silicon/tin nanoparticles are introduced into a matrix based on at least one organic polymer, being more particular dispersed therein, and subsequently, in a second step of the process, the resultant polymer matrix containing the silicon, tin and/or silicon/tin nanoparticles is carbonized to form carbon.

主权项

1. A method for producing an electrically conductive porous silicon- and/or tin-containing material suitable for the production of anode materials and lithium-ion batteries, wherein:
(i) silicon nanoparticles and/or tin nanoparticles and/or silicon/tin nanoparticles are introduced into a polymer matrix based on at least one organic polymer in a first process step, wherein the silicon nanoparticles and/or tin nanoparticles and/or silicon/tin nanoparticles are subjected to a surface modification by alkylsilyl group functionalization before being introduced into the polymer matrix, and (ii) then in a second process step, the polymer matrix containing the silicon and/or tin and/or silicon/tin nanoparticles is carbonized to carbon, wherein the resulting carbon material has a BET surface area of 100 to 1,750 m2/g.