Treating sulfide glass surfaces and making solid state laminate electrode assemblies
Methods for making solid-state laminate electrode assemblies include methods of forming a solid electrolyte interphase (SEI) by ion implanting nitrogen and/or phosphorous into the glass surface by ion implantation.
1. A solid-state laminate electrode assembly, comprising:
a lithium ion conducting sulfide glass substrate, the substrate comprising a sulfide glass solid electrolyte sheet having room temperature Li ion conductivity of at least 10 −5 S/cm, the sulfide glass substrate having first and second major surfaces;
a solid electrolyte interphase (SEI) layer comprising lithium and one or both of nitrogen and phosphorous at the first major surface of the sulfide glass substrate.
2. The solid-state laminate electrode assembly of claim 1 , wherein the SEI layer is continuous.
3. The solid-state laminate electrode assembly of claim 1 , wherein the SEI comprises lithium nitride.
4. The solid-state laminate electrode assembly of claim 1 , wherein the SEI comprises lithium phosphide.
5. The solid-state laminate electrode assembly of claim 1 , wherein the SEI is a continuous layer of a lithium nitride and/or lithium phosphide compound.
6. The solid-state laminate electrode assembly of claim 1 , wherein the SEI is not greater than 10 nm deep.
7. The solid-state laminate electrode assembly of claim 1 , wherein the SEI is not greater than 10-100 nm deep.
8. The solid-state laminate electrode assembly of claim 1 , wherein the SEI is not greater than 100-1000 nm deep.
9. The solid-state laminate electrode assembly of claim 5 , further comprising a lithium ion intercalating transition metal oxide electrode adjacent to the second major surface of the sulfide glass substrate of the solid-state laminate electrode assembly.
10. The solid-state laminate electrode assembly of claim 9 , wherein a battery electrolyte is disposed between the second major surface of the sulfide glass substrate and the positive electrode.
11. The solid-state laminate electrode assembly of claim 10 , wherein the positive electrode is disposed in direct contact with the second major surface of the sulfide glass substrate.
12. The solid-state laminate electrode assembly of claim 11 , wherein the assembly is fully solid-state.