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 P, As, Ge, Ga, Sb, Si, Sn, Al, In, Ti, V, Nb, and Ta, X2− is selected from the group S, Se, and Te, Y− is selected from the group Cl, B
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 P, As, Ge, Ga, Sb, Si, Sn, Al, In, Ti, V, Nb, and Ta, X2− is selected from the group S, Se, and Te, Y− is selected from the group Cl, Br, I, F, CN, OCN, SCN, N3, and where 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.
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1. A lithium argyrodite of the general formula (I): Li+(12-n-x)Bn+X2−6-xY−x (I) in which 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
1. A lithium argyrodite of the general formula (I): Li+(12-n-x)Bn+X2−6-xY−x (I) in which 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, N3, and in which 0≦x≦2. 2. The lithium argyrodite as claimed in claim 1, characterized in that the component Bn+ is selected from the group consisting of P, As, Ge, Ga, Sb, Si, Sn, Al, In, Ti, V, Nb and Ta, and preferably from the group consisting of P, As and Ga. 3. The lithium argyrodite as claimed in claim 1, characterized in that the component X2− is selected from the group consisting of S, Se and Te, and preferably from the group consisting of S and Se. 4. The lithium argyrodite as claimed in claim 1, characterized in that the component Y− is selected from the group consisting of Cl, Br, I, F, CN, OCN, SCN, N3, and preferably from the group consisting of Cl, Br and I. 5. The lithium argyrodite as claimed in claim 1, characterized in that it is a compound of the general formula (II): Li6PS5Z (II) in which the constituent Z a monovalent anion selected from the group consisting of the halides and pseudohalides. 6. The lithium argyrodite as claimed in claim 5, characterized in that the component Z is selected from the group consisting of Cl, Br and I. 7. The lithium argyrodite as claimed in claim 1, characterized in that it is a compound of the general formula (III): Li6B6+S5-aX2−aY− (III) in which B6+ is selected from the group consisting of P, As and Sb, X2− is selected from the group consisting of Se and Te, Y− is selected from the group consisting of Cl, Br, I, F, CN, OCN, SCN, N3, and in which 0≦a≦2. 8. The lithium argyrodite as claimed in claim 1, characterized in that it is a compound of the general formula (IV): Li7B6+S6-aX2−a (IV) in which B6+ is selected from the group consisting of P, As and Sb, X2− is selected from the group consisting of Se and Te, and in which 0≦a≦2. 9. A process for the preparation of a lithium argyrodite of the general formula (I), characterized by the steps: mixing of the stoichiometric amounts of the starting substances under an inert gas atmosphere, pressing of the resulting powder mixture to give pellets, and heating of the pellets to temperatures from 400° C. to 700° C. for a duration of from 3 days to 10 days. 10. The process for the preparation of a lithium argyrodite as claimed in claim 9, characterized in that temperatures of from 500° C. to 600° C., preferably of 550° C., are established. 11. The process for the preparation of a lithium argyrodite as claimed in claim 9, characterized in that the heating is carried out for a duration of from 4 days to 8 days, preferably for 7 days. 12. The use of a lithium argyrodite as claimed in claim 1 as a lithium ion electrolyte in primary and secondary electrochemical energy stores. 13. The lithium argyrodite as claimed in claim 2, characterized in that the component X2− is selected from the group consisting of S, Se and Te, and preferably from the group consisting of S and Se. 14. The lithium argyrodite as claimed in claim 2, characterized in that the component Y− is selected from the group consisting of Cl, Br, I, F, CN, OCN, SCN, N3, and preferably from the group consisting of Cl, Br and I. 15. The lithium argyrodite as claimed in claim 3, characterized in that the component Y− is selected from the group consisting of Cl, Br, I, F, CN, OCN, SCN, N3, and preferably from the group consisting of Cl, Br and I. 16. The lithium argyrodite as claimed in claim 13, characterized in that the component Y− is selected from the group consisting of Cl, Br, I, F, CN, OCN, SCN, N3, and preferably from the group consisting of Cl, Br and I. 17. The lithium argyrodite as claimed in claim 2, characterized in that it is a compound of the general formula (II): Li6PS5Z (II) in which the constituent Z a monovalent anion selected from the group consisting of the halides and pseudohalides. 18. The lithium argyrodite as claimed in claim 3, characterized in that it is a compound of the general formula (II): Li6PS5Z (II) in which the constituent Z a monovalent anion selected from the group consisting of the halides and pseudohalides. 19. The lithium argyrodite as claimed in claim 4, characterized in that it is a compound of the general formula (II): Li6PS5Z (II) in which the constituent Z a monovalent anion selected from the group consisting of the halides and pseudohalides. 20. The lithium argyrodite as claimed in claim 14, characterized in that it is a compound of the general formula (II): Li6PS5Z (II) in which the constituent Z a monovalent anion selected from the group consisting of the halides and pseudohalides.
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