Patent ID: 8333911

Claim:
A material comprising a mixture of particles distributed in at least one polymer, wherein: a) the mixture of particle is made of particles having a particle size distribution d50 of between 0.1 and 50 μm, said particles being formed of a carrier based on at least one active material M 1 of average size T 1 and of specific surface area S 1 , to which are attached, via physical and/or chemical bonds, particles of at least one electronically conductive material M 2 of average size T 2 and of specific surface area S 2 , wherein: the average size ratio T 1 /T 2 is between 5 and 10,000; the specific surface area ratio S 1 /S 2 is between 1/300 and 1/2; and the respective amounts of the active material M 1 and of the conductive material M 2 are such that 1%≦M 2 /(M 1 +M 2 )≦15%; b) the amount of polymer represents from 10% to 50% of the total amount of conductive material and of active material, wherein the polymer is a 3 branch or 4 branch polyether having structural units represented by formula (1), structural unit represented by formula (2) and/or the structural units represented by formula (3) wherein the number of structural units represented by formula (1) is from 1 to 22 800, and the total number of structural units of formula (2) and (3) is from 1 to 13 600, wherein each branch of the polymer has a crosslinkable end group selected from acrylate and methacrylate groups, or a non crosslinkable end group selected form alkoxy, allyloxy and vinyloxy, and at least one branch has a crosslinkable end group.