Electrode design for an electrochemical cell of the primary lithium type

A method for manufacturing an electrochemical cell comprising a container comprising an electrode plate group, said electrode plate group being in the shape of a spiral constituted by a winding of a structure obtained by superpositioning:

• a positive electrode comprising active material selected from SOCl2, SO2, SO2Cl2;
• CFx with x≤1.5;
• MnOS2, FeS2, V2O5, I2, Bi2O3, Bi2Pb2O5, CuCl2, CuF2, CuO, Cu4O(PO4)2, CuS, FeS, MoO3, Ni3S2, AgCl, Ag2CrO4, SVO, MO6S8, and a mixture of several of the above,
• a separator;
• a negative electrode comprising an active material consisting of lithium metal or lithium-based alloy;
• characterized in that an outer face of the spiral, facing the container, is formed by the positive electrode;
• and that a strip of lithium or of a lithium-based alloy at least partially covers an inner face of the container, the method comprising at least the following steps:
• a) placing the strip of lithium or lithium-based alloy up against an inner face of the container, so that the entire surface of the strip of lithium or lithium-based alloy will face the last turn of the electrode plate group formed by the positive electrode;
• b) forming the electrode plate group in the shape of a spiral;
• c) introducing the electrode plate group into the container obtained in step a);
• d) performing electrical connection between the negative electrode and a current output negative terminal of the cell and performing electrical connection between the positive electrode and a current output positive terminal of the cell;
• e) assembling a cover onto the container;
• f) filling the cell with an electrolyte;
• g) closing the cell.