ANODE MATERIAL, BATTERY AND METHOD FOR PRODUCING AN ANODE MATERIAL
An anode material having a number of particles. A respective particle has a core and a sheath surrounding the core. The sheath contains silicon, carbon and nitrogen. Also provided is a battery and a method for producing an anode material.
1 . An anode material comprising a plurality of particles, wherein a respective particle has a core and a shell surrounding the core, and wherein the shell contains silicon, carbon, and nitrogen.
2 . The anode material according to claim 1 , wherein the silicon in the shell forms a plurality of nanoparticles.
3 . The anode material according to claim 2 , wherein the nanoparticles have an average diameter in a range of about 0.5 nm to 5 nm.
4 . The anode material according to claim 1 , wherein the silicon in the shell together with the carbon and the nitrogen forms an inactive matrix in which the nanoparticles are embedded.
5 . The anode material according to claim 4 , wherein the inactive matrix is formed from a plurality of regions made of nitrogen-doped carbon, silicon nitride, silicon carbide, and silicon carbonitride.
6 . The anode material according to claim 1 , wherein the core is made exclusively of carbon.
7 . The anode material according to claim 1 , wherein the particles have a casing, made of carbon, in which the core and the shell are enclosed.
8 . The anode material according to claim 1 , wherein the core and the shell of the particle, taken together, have a plate-or rod-shaped design.
9 . A battery that comprises an anode produced from an anode material according to claim 1 .
10 . A method for producing an anode material, the method comprising:
providing a plurality of particles, at least one of the particles has a core and a shell surrounding the core; and
producing the shell by gas phase deposition using a silicon-containing gas, a carbon-containing gas, and a nitrogen-containing gas.