Method for Producing an Electrochemical Cell Comprising a Lithium Electrode, and Electrochemical Cell

A method for producing an electrochemical cell for a solid-state battery comprising a negative electrode with at least one layer of metallic lithium, a positive electrode and a lithium-ion-conducting solid electrolyte arranged between the negative electrode and the positive electrode, the method comprising the steps of:

• providing the negative electrode;
• providing the positive electrode;
• providing a substrate composed of the solid electrolyte with a first surface and a second surface that that is opposite the first surface;
• joining together of the substrate with the positive electrode on the first surface and the negative electrode on the second surface, so that the solid electrolyte lies between the negative electrode and the positive electrode and the layer of metallic lithium is opposite the second surface,
• wherein the layer of metallic lithium, before being joined together with the substrate, is heated until it softens on at least one surface opposite the second surface of the substrate.