Patent ID: 7157184
Filing Date: 2007-01-02
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
1. An electrochemical element comprising at least one positive electrode assembly and at least one negative electrode assembly produced by forming a paste from: a PVDF-HFP-copolymer with a proportion of HFP to PVDF of less than about 8% by weight, an electrochemically active material insoluble in the polymer, and a solvent, in which paste the active material is finely dispersed in the polymer, forming an electrode film by applying the paste to a carrier sheet, applying a PVDF-HFP-copolymer with a proportion of HFP to PVDF of less than about 8% by weight, and with the proportion of PVDF-HFP in the negative electrode being different than the proportion of PVDF-HFP in the positive electrode, to a polyolefin separator and laminating the electrode film to the polyolefin separator.