Electroactive materials for metal-ion batteries

A process for preparing composite particles, the process comprising the steps of:

• (a) providing a plurality of porous particles comprising micropores and/or mesopores, wherein the total pore volume of micropores and mesopores as measured by gas adsorption is in the range from 0.4 to 2.2 cm3/g, wherein the porous particles have a PD90 pore diameter in the range from 2.5 to 20 nm;
• (b) contacting the porous particles with a precursor of an electroactive material at a temperature effective to cause deposition of a plurality of electroactive material domains in the pores of the porous particles;
• (c) forming a plurality of modifier material domains in the pores of the porous particles and adjacent to the electroactive material domains deposited in step (b).
• (d) contacting the porous particles from step (c) with a precursor of an electroactive material at a temperature effective to cause deposition of further electroactive material domains in the pores of the porous particles from step (c) and adjacent to the modifier material domains formed in the porous particles from step (c).