The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 20, 2000
Filed:
Dec. 09, 1997
Peter Bauerlein, Bad Camber, DE;
Varta Batterie Aktiengesellschaft, Hannover, DE;
Abstract
The invention relates to a method for preparing polymer electrolytes for rechargeable lithium intercalation cells which contain a dissociable lithium salt dispersed in a polymeric matrix, the polymeric matrix being a self-supporting film of a copolymer of vinylidene difluoride and hexafluoropropylene, in which the plasticizer is exchanged for a solution of the dissociable lithium salt, so that the polymeric electrolyte 20 to 70 wt % of the solution of the dissociable lithium salt, and is characterized in that a plasticizer is used which is stable under the electrochemical conditions of a rechargeable lithium intercalation cell and is selected from the group consisting of hexylene carbonate, octylene carbonate or tributyl phosphate.