US Patent 8075865 Lithium argyrodite

The invention relates to lithium argyrodite of the general formula (I): Li+(12-n-x)Bn+X2−6-xY−x (I), where Bn+ is selected from the group consisting of P, As, Ge, Ga, Sb, Si, Sn, Al, In, Ti, V, Nb, and Ta; X2− is selected from the group consisting of S, Se, and Te; Y− is selected from the group consisting of Cl, Br, I, F, CN, OCN, SCN, and N3; 0≦x≦2, and a method for the production thereof, and the use thereof as a lithium-ion electrolyte in primary and secondary electrochemical energy storage.