| abstract |
The invention relates to a core-shell composite particle, wherein the shell is based on carbon and is non-porous, and the core is a porous aggregate containing a plurality of silicon particles, carbon and optionally further components, wherein the silicon particles have an average particle diameter (d50) of 0.5 to 5 [ mu ] m and are present in the core in a proportion of ≥ 80 wt.%, based on the total weight of the core-shell composite particle. |