Vitreous solid electrolyte sheets of Li ion conducting sulfur-based glass and associated structures, cells and methods

Patent metadata

Field	Value
Publication number	US-12183880-B2
Application number	US-202318191615-A
Country	US
Kind code	B2
Filing date	Mar 28, 2023
Priority date	Dec 2, 2014
Publication date	Dec 31, 2024
Grant date	Dec 31, 2024

Abstract

A lithium ion-conductive solid electrolyte including a freestanding inorganic vitreous sheet of sulfide-based lithium ion conducting glass is capable of high performance in a lithium metal battery by providing a high degree of lithium ion conductivity while being highly resistant to the initiation and/or propagation of lithium dendrites. Such an electrolyte is also itself manufacturable, and readily adaptable for battery cell and cell component manufacture, in a cost-effective, scalable manner.

First claim

The invention claimed is:

1. A standalone positive electrode assembly, comprising:
a positive electroactive component layer and a first solid electrolyte sheet,
wherein the positive electroactive component layer is encapsulated on a first major surface by the solid electrolyte sheet; and,
further wherein the solid electrolyte sheet comprises freestanding substantially amorphous solid electrolyte wall structures that are dense, inorganic and conductive of Li ions, the wall structures comprising:
i) a continuous Li ion conducting inorganic amorphous material phase with room temperature Li ion conductivity ≥10 −5 S/cm;
ii) first and second opposing principal sides and associated surfaces; and
ii) a microstructure devoid of contiguous crystalline grain boundaries and powder particle boundaries extending between the opposing principal side surfaces.

2. The standalone positive electrode assembly of claim 1 , wherein the assembly is double sided, comprising a second solid electrolyte sheet that encapsulates the second major surface of the positive layer.

3. The standalone positive electrode assembly claim 2 , wherein the assembly is edged sealed via discrete sidewall components.

4. The standalone positive electrode assembly claim 1 , wherein the assembly is edged sealed via discrete sidewall components.

5. The standalone positive electrode assembly claim 4 , wherein the positive layer is a multi-layer comprising a current collecting layer and an electroactive material layer.

6. The standalone positive electrode assembly of claim 5 , wherein the electroactive layer is a lithium ion intercalation compound.

7. The standalone positive electrode assembly of claim 6 , wherein the intercalation compound is an oxide.

8. The standalone positive electrode assembly of claim 1 , wherein the assembly is single-sided and an inert backplane component impermeable and non-reactive to liquid electrolytes.

9. The standalone positive electrode assembly of claim 8 , wherein the backplane is a metal layer.

10. The standalone positive electrode assembly of claim 9 , wherein the backplane is a polymer layer.

11. The standalone positive electrode assembly of claim 1 , wherein the edge seal is a fusion seal.

12. The standalone positive electrode assembly of claim 1 , wherein the assembly is devoid of liquid electrolyte.

Assignees

• Polyplus Battery Co Inc

Inventors

• Visco Steven J
• Nimon Yevgeniy S
• De Jonghe Lutgard C
• Katz Bruce D
• Nimon Vitaliy

Classifications

• H01M2300/0071

  Oxides · CPC title

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title

• H01M50/497

  Ionic conductivity · CPC title

• H01M50/437

  Glass · CPC title

• H01M50/44

  Fibrous material · CPC title