Patent ID: 6342320
Filing Date: 2002-01-29
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A method of making a rechargeable battery structure, which structure comprises, in sequence, a positive electrode element, a separator element, and a negative electrode element, characterized in that each of said electrode and separator elements comprises a flexible, polymeric matrix composition; said method comprising forming a mixture comprising a casting solvent, a polymeric material and a plasticizer, said plasticizer for at least one of said elements being a compound represented by the following general formula where R is a low alkyl having up to six carbon atoms; casting the mixture and removing said casting solvent to form a self-supporting film of said flexible, polymeric matrix composition; bonding each said element to contiguous elements at its respective interface to form a unitary flexible laminate structure; and then optionally removing a portion of said plasticizer from said laminate structure, wherein a portion of said plasticizer remains part of said battery structure.