Process for the production of thermodynamically stable solid ion conductor materials

US4386020A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Peter Hartwig · Berlin, DE
• Werner Weppner · Stuttgart, DE
• Winfried Wichelhaus · Mettmann, DE

Key dates

• Filing date: May 1, 1980
• Grant date: May 31, 1983
• Expiry date: May 1, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01G28/002
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

The present invention provides a process for the production of solid ion ductor materials (electrolytes) based on lithium or sodium compounds which stand in thermodynamic equilibrium with their alkali metal and have a high decomposition voltage, wherein two or more binary lithium or sodium compounds with an anion which is formed from one or more elements of the group consisting of nitrogen, phosphorus, arsenic, oxygen, sulphur, selenium, tellurium, hydrogen, fluorine, chlorine, bromine and iodine and which stand in thermodynamic equilibrium with their alkali metal are reacted together in such amounts and for such a period of time that a radiographically phase-pure product is formed. The present invention also provides ion conductor materials based on lithium or sodium compounds, which have the general formula: EQU A.sub.3u+2v+w X.sub.u Y.sub.v Z.sub.w wherein A is lithium or sodium, X is nitrogen, phosphorus and/or arsenic, Y is nitrogen, sulphur, tellurium and/or selenium, Z is hydrogen and/or halogen and u, v and w each represent a number of from 0 to 1 inclusive, with the proviso that only one of u, v and w can assume the value of 0. Furthermore, the present invention provides g…