Patent ID: 9647263
Date: 2017-05-09
CPC Classifications: B82Y,C01B,H01M,Y02E,Y02P

Claim:
1. A composition comprising a plurality of electroactive elongate elements and a plurality of electroactive particles, the elongate elements and particles each comprising a metal or semi-metal selected from one or more of the group consisting of silicon, tin, and germanium or mixtures thereof, characterized in that a. the elongate elements are selected from one or more of the group consisting of fibers, tubes, ribbons and flakes and b. the particles are selected from one or more of the group consisting of pillared particles, porous particles and porous particle fragments; and wherein the composition has a density in the range 0.3 g/cm 3 to 0.9 g/cm 3 and wherein the diameter of said plurality of particles is between the diameter of the elongate elements and three times the diameter of the elongate elements.