| abstract |
The invention relates to an electrochemical device comprising at least one substrate (1, 7), at least one electrically conductive layer (2, 6), at least one electrochemically active layer (3, 5) capable of reversibly inserting ions, in particular cations such as H ** +, Li ** +, Na ** +, Ag ** + and an electrolyte (4), this electrolyte (4) is a multilayer layer or stack comprising at least one layer (4b ) in an ionic conductive material capable of reversibly inserting the ions but the overall degree of oxidation of which is kept essentially constant. |