Method for forming and processing antiperovskite material doped with aluminum material
The present invention is related to formation and processing of antiperovskite material. In various embodiments, a thin film of aluminum doped antiperovskite is deposited on a substrate, which can be an electrolyte material of a lithium-based electrochemical storage device.
1. A solid electrolyte for a solid-state lithium ion or lithium metal cell, the solid electrolyte comprising:
an antiperovskite having the formula Li 3-n R 1-z/2 X z H n
where R is O, S, Se, or Te and X is a halide;
wherein the antiperovskite has a lithium ion conductivity of at least about 1×10 −5 S/cm at room temperature;
wherein subscript n is from greater than 0 to less than or equal to 2;
wherein subscript z is greater than 0.8; and
wherein the lithium deficient variant of an antiperovskite has a lithium ion conductivity, σ i , that is at least about 10 7 times greater than its electronic conductivity, σ e .
2. A solid state battery comprising:
a solid electrolyte of claim 1 ;
a positive electrode; and
a negative electrode comprising lithium metal or reversibly available lithium ions.
3. The solid state battery of claim 2 , wherein the positive electrode comprises a metal and lithium fluoride when in a discharged state.
4. The solid electrolyte for a solid-state lithium ion or lithium metal cell of claim 1 , wherein the antiperovskite is doped with aluminum.
5. The solid electrolyte for a solid-state lithium ion or lithium metal cell of claim 1 , wherein n is from greater than 0 to less than 0.5.