The invention relates to a solid ionic conductor for a rechargeable non-aqueous electrochemical battery cell having the stoichiometric formula K(ASXX′).sub.p×q SO.sub.2, where K represents a cation from the group of the alkali metals with p=1, of the alkaline-earth metals with p=2 or of the zinc group with p=2, A represents an element from the third main group, S represents sulfur, selenium or tellurium, X and X′ represent a halogen, and the numerical value q is greater than 0 and less than or equal to 100.

An electrolyte for a rechargeable non-aqueous electrochemical battery cell having a negative electrode and a positive electrode is described. The electrolyte contains sulfur dioxide and comprises a conducting salt, and a battery cell therefore has almost no capacitance loss over the cycles. Furthermore, a corresponding battery cell and a method for producing the electrolyte are described.

An electrolyte for a rechargeable non-aqueous electrochemical battery cell having a negative electrode and a positive electrode is described. The electrolyte contains sulfur dioxide and comprises a conducting salt, and a battery cell therefore has almost no capacitance loss over the cycles. Furthermore, a corresponding battery cell and a method for producing the electrolyte are described.

The invention relates to a solid ionic conductor for a rechargeable non-aqueous electrochemical battery cell having the stoichiometric formula K(ASXX).sub.pq SO.sub.2, where K represents a cation from the group of the alkali metals with p=1, of the alkaline-earth metals with p=2 or of the zinc group with p=2, A represents an element from the third main group, S represents sulfur, selenium or tellurium, X and X represent a halogen, and the numerical value q is greater than 0 and less than or equal to 100.

An electrolyte for a rechargeable non-aqueous electrochemical battery cell having a negative electrode and a positive electrode is described. The electrolyte contains sulfur dioxide and comprises a conducting salt, and a battery cell therefore has almost no capacitance loss over the cycles. Furthermore, a corresponding battery cell and a method for producing the electrolyte are described.