Patent ID: 6730440
Filing Date: 2004-05-04
Classification: H01G,H01M,Y02E,Y02P

Abstract:
A composite comprisingAa) at least one separator layer Aa which comprises a mixture Ia, comprising a mix IIa consisting of a) from 1 to 95% by weight of a solid III, preferably a basic solid III, having a primary particle size of from 5 nm to 20 &mgr;m and b) from 5 to 99% by weight of a polymeric composition IV obtainable by polymerization of b1) from 5 to 100% by weight, based on the composition IV, of a condensation product V of &agr;) at least one compound VI which is able to react with a carboxylic acid or a sulfonic acid or a derivative or a mixture of two or more thereof, and &bgr;) at least 1 mol per mol of the compound VI of a carboxylic acid or sulfonic acid VII which contains at least one free-radically polymerizable functional group, or a derivative thereof or a mixture of two or more thereof, and b2) from 0 to 95% by weight, based on the composition IV, of a further compound VIII having a mean molecular weight (number average) of at least 5000 and polyether segments in the main chain or a side chain, where the proportion by weight of the mix IIa in the mixture Ia is from 1 to 100% by weight, and the layer is free of an electro-conducting, electrochemically active compound, and B) at least one cathode layer B which comprises an electron-conducting, electrochemically active compound which is able to release lithium ions on charging, C) at least one anode layer C which comprises an electron-conducting, electrochemical compound which is able to take up lithium ions on charging, and at least one bonding layer D, being formed by using polymeric compounds, where the bonding layer has a melting point which is lower than the melting point of the separator layer Aa or the cathode layer B or the anode layer C or the separator layer Aa and the cathode layer B and the anode layer C.