| 摘要 |
A particulate material comprises a plurality of porous particles comprising an electroactive material selected from silicon, germanium or a mixture thereof, wherein the porous particles have a D50 particle diameter in the range between 5-25 μm, an intra-particle porosity in the range between 30-90%, and a pore diameter distribution having a peak in the range between 50-400 nm as determined by mercury porosimetry. Also provided are electrodes and electrode compositions comprising the particulate material, a rechargeable metal-ion battery comprising the particulate material, and a process for the preparation of the particulate material. This process comprises providing a plurality of alloy particles comprising 11-45 wt% Si and/or Ge and a metal matrix component, and leaching the alloy particles to remove at least part of the metal matrix component. |
