Sulfide and oxy-sulfide glass and glass-ceramic films for batteries incorporating metallic anodes

Abstract

A solid state electrolyte including an oxy-sulfide glass or glass ceramic, solid state electrolyte layer having a thickness in the range of ten micrometers to two hundred micrometers is provide. The composition of the electrolyte layer is the reaction product of a mixture initially including either a glass former including sulfur or a glass co-former including sulfur, and a glass modifier including Li2O or Na2O. The solid-state electrolyte layer is further characterized as having a wholly amorphous microstructure or as having small recrystallized regions separated from each other in an amorphous matrix, the recrystallized regions having a size of up to five micrometers. The solid-state electrolyte layer includes mobile lithium ions or mobile sodium ions associated with sulfur anions chemically anchored in the microstructure.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a divisional of U.S. patent application Ser. No. 15 / 480,505 filed on Apr. 6, 2017. The entire disclosure of the above application is incorporated herein by reference.TECHNICAL FIELD

[0002] Methods are provided for preparing sulfide and oxy-sulfide glass and glass-ceramic solid-state electrolytes for batteries having a metallic anode substantially consisting of lithium or sodium. Dense sulfur-containing glasses are prepared which enable the formation of energy dense metal anode batteries while preventing penetration of metallic dendrites into the solid-state electrolyte / separator.INTRODUCTION

[0003] Lithium batteries are finding increasing use in automotive vehicles and many other consumer products and sodium batteries are receiving favorable consideration for such applications. Exemplary batteries may employ a lithium metal anode in combination with a suitable liquid or solid electrolyte and a compatible active cathode mat...

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