Patent ID: 6986967
Filing Date: 2006-01-17
Classification: B29C,B29L,H01M,Y02E,Y02P,Y10T

Abstract:
1. An electrochemical cell comprising at least one composite structure made by a process for forming a multilayer composite structure, said process comprising: combining at least one first heat-stable dry component and at least one first heat-stable liquid component to form a macroscopically homogeneous first mass; fusing the first mass to form a first plastically formable mass; combining at least one second dry component and at least one second liquid component to form a macroscopically homogeneous second mass; fusing the second mass to form a second plastically formable mass; providing a first die having at least one slot; simultaneously forcing the first plastically formable mass and the second plastically formable mass through at least one slot onto a first support to form a first multilayer composite structure; wherein the at least one first heat-stable dry components comprises an active electrochemical material, particulate material and an ionomeric polymer, and wherein the polymer comprises monomer units of vinylidene fluoride and 2–50 mol-% of a perfluoroalkenyl monomer unit having a pendant group comprising the radical represented by formula (I): wherein R and R′ are independently selected from F, Cl or a perfluoroalkyl group having 1 to 10 carbon atoms, optionally substituted by one or more ether oxygens; a=0, 1 or 2; b=0 to 6; M X is O, C or N with the proviso that