Solid-state batteries with glassy solid electrolyte

Patent metadata

Field	Value
Publication number	US-2025372700-A1
Application number	US-202519092848-A
Country	US
Kind code	A1
Filing date	Mar 27, 2025
Priority date	May 28, 2024
Publication date	Dec 4, 2025
Grant date	—

Abstract

A solid-state battery having an enveloped electrode assembly includes an electroactive layer having a first major surface and side surfaces that are encapsulated within a Li ion conductive glassy medium. The encapsulated electroactive layer may be in compression.

First claim

What is claimed is:

1 . A solid-state battery comprising, an enveloped electrode assembly comprising an electroactive layer having a first major surface and side surfaces encapsulated within a Li ion conductive glassy medium.

2 . The solid-state battery of claim 1 , wherein, the electroactive layer is in compression.

3 . The solid-state battery of claim 1 , wherein the electroactive layer further comprises a current collecting layer having a first surface that is covered by the electroactive layer, a second surface that is exposed, and side edges, and wherein the glassy medium encapsulates the side edges of the current collector but not the second surface.

4 . The fully solid-state battery of claim 1 , wherein the electroactive layer comprises polycrystalline solid electrolyte particles having a phosphate composition.

5 . The fully solid-state battery cell of claim 4 , wherein the electroactive layer has a dual layer structure, wherein a first layer provides a majority of the electroactive layer ampere-hour capacity and comprises the phosphate polycrystalline solid electrolyte particles, and a second porous layer in direct contact with the glassy medium, wherein the pores of the second layer contain Li ion conducting sulfide solid electrolyte.

6 . The fully solid-state battery of claim 5 , wherein the phosphate electrolyte particles are LATP and the sulfide solid electrolyte is a glass.

Assignees

• Polyplus Battery Co Inc

Inventors

• Visco Steven J
• Nimon Vitaliy
• Petrov Alexei
• Nimon Yevgeniy S
• Katz Bruce D

Classifications

• H01M10/052

  Li-accumulators · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M2300/0068

  inorganic · CPC title

• H01M2300/0094

  in the form of layered products, e.g. coatings · CPC title