Silicon-containing materials

A silicon-containing material, comprising:

• wherein said silicon-containing material is based on one or more porous particles and silicon;
• wherein the silicon is disposed in pores and on the surface of the one or more porous particles and the silicon-containing material has a specific surface area of at most 50 m2/g, determined by nitrogen sorption and BET evaluation;
• and
• wherein the one or more porous particles have
• a) a mean electrical particle resistance of at least 2 kOhm, and
• b) a reversible delithiation capacity β of at most 100 mAh/g.

An anode material, comprising:

• a silicon-containing material, wherein the silicon-containing material is based on one or more porous particles and silicon;
• wherein the silicon is disposed in pores and on the surface of the one or more porous particles and the silicon-containing material has a specific surface area of at most 50 m2/g, determined by nitrogen sorption and BET evaluation;
• wherein the one or more porous particles have
• a) a mean electrical particle resistance of at least 2 kOhm, and
• b) a reversible delithiation capacity β of at most 100 mAh/g;
• wherein the anode material comprises 5 to 95% by weight of the silicon-containing material, 0 to 90% by weight of one or more further electrically conducting components, 0 to 90% by weight of graphite, 0 to 25% by weight of binder and 0 to 80% by weight of further additives, wherein the percentages by weight refer to the total weight of the anode material and the proportions of all constituents of the anode material add up to 100% by weight.