Lithium accumulator and the method of producing thereof

A method of producing a lithium accumulator including at least one cell including a first electrode provided with a first current collector and connected to a first pole and a second electrode provided with a second current collector and connected to a second pole, the first electrode and the second electrode being separated from each other by a separator, the method comprising steps of:

• preparing a material of the first electrode from a fully inorganic mixture of dry powders of a first electron conductive component and a first active material free of organic binders and with the ability to completely absorb and extract lithium ions in the time interval of up to 20 minutes in the presence of electrolyte and having the morphology of hallow spheres with a wall thickness of maximum 10 micrometers, or a morphology of aggregates or agglomerates of maximum 30 micrometers in size,
• pressing down the mixture of dry powders to form a first electrode of minimum thickness of 0.5 mm and porosity of 25 to 90%,
• preparing a powder of electrically insulating ceramic material free of organic binders,
• pressing down the powder to form a separator with open pores, and porosity of 30 to 95%,
• preparing material of the second electrode selected from the group consisting of a compressed, homogeneous mixture of dry powder free of organic binders of second active material and a second electron conductive component, metal lithium in the form of a lithium sheet or a foil, compressed lithium sheet or foil and dendrites thereof,
• using the material of the second electrode to form the second electrode of minimum thickness of 0.5 mm and porosity of 25 to 90%,
• providing the first electrode with the first current collector and the second electrode with the second current collector,
• completing the cell by joining the first electrode, the separator and the second electrode, and connecting the current collectors, and
• encasing the completed cell together with an electrolyte comprising a non-aqueous solution of a lithium salt in an organic polar solvent into the accumulator body.