Importance

Loading Importance Indicators...

Abstract

A particulate material is provided consisting of a plurality of porous particles comprising an electroactive material selected from silicon, germanium or a mixture thereof (especially a silicon-aluminium alloy), wherein the porous particles have a D₅₀ particle diameter in the range of 0.5 to 7 μm, an intra-particle porosity between 50 and 90%, and a pore diameter distribution having at least one peak in the range of 30 to 400 nm as determined by mercury porosimetry. Also provided are electrodes (especially anodes) and electrode compositions comprising the particulate material, a rechargeable metal-ion battery (especially a Li-ion battery) comprising the particulate material, and a process for the preparation of the particulate material. It is suggested that the claimed particulate material can be repeatedly lithiated without fracturing, allows easy access to the electrolyte and can be easily dispersed in an electrode slurry.

Loading the Abstract Image...

First Claim