POROUS ELECTROACTIVE MATERIAL

摘要

A composition including a plurality of electroactive porous particle fragments including silicon as an electroactive material is characterised in that each porous particle fragment includes a network of pores defined and separated by silicon containing walls. The network of pores suitably has a three dimensional arrangement of pores extending through the volume of the particle in which the pore openings are provided on two or more planes over the surface of the particle. The composition is useful as an electroactive material that is able to form an alloy with lithium and can be used in the fabrication of anodes for use in lithium ion secondary batteries. A method of fabricating the silicon containing porous particle fragments is also disclosed.