Lithium all-solid-state battery

Patent metadata

Field	Value
Publication number	US-11283106-B2
Application number	US-201916698066-A
Country	US
Kind code	B2
Filing date	Nov 27, 2019
Priority date	Jan 10, 2012
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

An all-solid-state lithium battery, thermo-electromechanical activation of Li2S in sulfide based solid state electrolyte with transition metal sulfides, and electromechanical evolution of a bulk-type all-solid-state iron sulfur cathode, are disclosed. An example all-solid-state lithium battery includes a cathode having a transition metal sulfide mixed with elemental sulfur to increase electrical conductivity. In one example method of in-situ electromechanically synthesis of Pyrite (FeS2) from Sulfide (FeS) and elemental sulfur (S) precursors for operation of a solid-state lithium battery, FeS+S composite electrodes are cycled at moderately elevated temperatures.

First claim

What is claimed is:

1. A battery comprising a composite cathode, the composite cathode including:
a solid-state electrolyte;
an iron sulfide compound; and
a sulfur source made to be electrochemically active by its proximity to the iron sulfide compound and the compound's charge and discharge products.

2. The battery of claim 1 , wherein the solid-state electrolyte is sulfide-based.

3. The battery of claim 1 , wherein the iron sulfide compound comprises at least one of FeS or FeS 2 .

4. The battery of claim 1 , wherein the sulfur source comprises Li 2 S or S.

5. The battery of claim 1 , wherein the sulfur source is present within a solid electrolyte material.

6. The battery of claim 1 , wherein the composite cathode further includes an electronic conductive additive.

7. The battery of claim 6 , wherein the electronic conductive additive is carbon or a mixed ionic-electronic conductive additive or a combination of the two additive types.

8. The battery of claim 7 , wherein the mixed ionic-electronic conductive additive is TiS 2 .

9. The battery of claim 1 further comprising an anode and a solid-state electrolyte layer between the composite cathode and the anode.

10. The battery of claim 1 , further comprising an anode including lithium metal, carbon, or silicon-based active materials.

Assignees

• Univ Colorado Regents

Inventors

• Yersak Thomas A
• Lee Se-Hee
• Stoldt Conrad

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/364

  as mixtures · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M2300/0068

  inorganic · CPC title