Patent ID: 7326493
Filing Date: 2008-02-05
Classification: H01M,Y02E,Y02P

Abstract:
1. Lithium electrochemical generator comprising: a positive peripheral electrode comprising an electrically conductive substrate to which a positive active layer, including a positive active material, adheres; a negative peripheral electrode comprising an electrically conductive substrate to which a negative active layer, including a negative active material, adheres; the positive peripheral electrode and the negative peripheral electrode being respectively located at opposite ends of the generator; at least one bipolar electrode comprising a positive active layer, including a positive active material, which adheres to a first electrically conductive substrate and comprising a negative active layer, including a negative active material, which adheres to a second electrically conductive substrate, the said first and second substrates being fixed together or forming a single substrate; two separators that are lithium ion conductors but electronic insulators, which flank each bipolar electrode; the said generator being characterized in that the said first and second electrically conductive substrates of the at least one bipolar electrode are made of identical or different materials chosen from the group formed by aluminium and its alloys and in that the negative active material of the negative active layer of the at least one bipolar electrode is a material not capable of forming an aluminium-lithium alloy with the material of the said second electrically conductive substrate.