Patent ID: 7901811
Filing Date: 2011-03-08
Classification: H01M,Y02E

Abstract:
1. Rechargeable electrochemical battery cell having a negative electrode, an electrolyte based on sulfur dioxide, and a positive electrode, the negative electrode comprising an electronically conductive substrate on which an active mass is electrolytically deposited when charging the cell, wherein the battery cell comprises a porous structure contacting the substrate of the negative electrode, the porous structure is determined by the size and shape of structure-forming solid particles, the material of which is not an ionically dissociating material, and is inert relative to the electrolyte, its overcharge products, and the active mass, the volume proportion of the solid particles in the porous structure is at least 40%, and the porous structure is formed and positioned in such a manner that the active mass deposited during charging of the cell penetrates from the surface of the substrate into its pores and is further deposited therein, wherein the porous structure is made of solid particles which are not bonded to one another or are bonded to one another by a binder.