Li/garnet electrolyte interface with low interfacial resistance

Patent metadata

Field	Value
Publication number	US-12230766-B2
Application number	US-202318110045-A
Country	US
Kind code	B2
Filing date	Feb 15, 2023
Priority date	Mar 10, 2020
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A lithium-metal battery, includes: a substrate; a cathode disposed on the substrate; a garnet solid-state electrolyte disposed on the cathode; and a lithium anode disposed on the garnet solid-state electrolyte, such that a modification layer is disposed at an interface of the lithium anode and garnet solid-state electrolyte, the modification layer includes: a first portion; and a second portion, such that the first portion has a lithium component and the second portion has a garnet component. A method of forming a lithium-metal battery, includes: stacking a garnet source with at least one lithium source; and heating the stack at a temperature of at least 300° C. for a time in a range of 1 sec to 20 min to form a modification layer, such that the modification layer is disposed at an interface of the garnet source and the lithium source.

First claim

What is claimed is:

1. A lithium-metal battery, comprising:
a substrate;
a cathode disposed on the substrate;
a garnet solid-state electrolyte disposed on the cathode; and
a lithium anode disposed on the garnet solid-state electrolyte, wherein a modification coating layer is disposed at an interface of the lithium anode and garnet solid-state electrolyte, the modification coating layer comprising:
a lithium component; and
a garnet component comprises a Ta-doped garnet containing Ta in the 4+ oxidation state.

2. The battery of claim 1 , wherein an interfacial resistance at the interface is less than 1 Ω·cm 2 .

3. The battery of claim 1 , wherein a thickness of the modification coating layer is from 1 nm to 50 nm.

4. The battery of claim 1 , wherein the modification coating layer comprises at least one of: Au, Ag, Si, C, Zn, Mg, Sn, Ti, B, Pb, Ge, or combinations thereof.

5. The method of claim 1 , wherein the cathode comprises at least one of: LiCoO 2 , LiNiO 2 , Li 2 MnO 3 , LiNi 0.5 Mn 1.5 O 4 , LiFePO 4 , LiNi x Co y Mn 1-x-y O 2 , or combinations thereof.

6. The battery of claim 1 , wherein the cathode comprises a composite sulfur cathode including a conductive carbon component.

7. The battery of claim 1 , wherein the modification coating layer comprises at least one of Au or Ag.

8. The battery of claim 3 , wherein the thickness of the modification coating layer is from 10 nm to 25 nm.

9. The battery of claim 1 , wherein the modification coating layer is a reduction layer.

Assignees

• Corning Inc
• Shanghai Inst Ceramics Cas
• Shanghai Inst Of Ceramics Chinese Academy Sciences

Inventors

• Badding Michael Edward
• Jin Jun
• Song Zhen
• Su Jianmeng
• Wen Zhaoyin
• Xiu Tongping

Classifications

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/366

  as layered products · CPC title

• H01M2300/0071

  Oxides · CPC title