Method for the production of an electrochemical cell and cell stack obtained in this way

Method for the production of an electrochemical cell as well as cell stack thus obtained, in particular with annular electrolyte arranged in a pressure vessel. Such a cell is produced by providing an annular precursor already provided with the electrodes and where the product is converted to the desired membrane/electrolyte by heating and oxidation. By using a pressure vessel pressure can also be generated during the conversion. To this end the region outside the cell is provided with a fill material. A number of cells can be stacked on top of one another. With this arrangement the anode of the one cell can act as cathode of the other cell by means of a Z-shaped configuration. Adjacent anodes/cathodes can be applied to one another by welding or can be of Z-shaped design.