Extruded sealing layer for biodegradable electrochemical device and methods thereof

Patent metadata

Field	Value
Publication number	US-2023395911-A1
Application number	US-202217805748-A
Country	US
Kind code	A1
Filing date	Jun 7, 2022
Priority date	Jun 7, 2022
Publication date	Dec 7, 2023
Grant date	—

Abstract

An electrochemical device including a first substrate layer is disclosed. The electrochemical device also includes an anode disposed upon the first substrate layer. The device also includes a second substrate layer. The electrochemical device also includes a cathode disposed upon the second substrate layer and an electrolyte composition disposed between and in contact with the anode and the cathode. The electrochemical device also includes an extruded sealing layer composition disposed between the first substrate layer and the second substrate layer. A sealing layer composition and a method of producing a sealing layer is also disclosed.

First claim

What is claimed is:

1 . An electrochemical device, comprising:
a first substrate; a first electrode disposed upon the first substrate; a second substrate; and
an extruded sealing layer composition disposed between the first substrate and the second substrate.

2 . The electrochemical device of claim 1 , wherein the extruded sealing layer composition comprises a crosslinked polymer.

3 . The electrochemical device of claim 1 , wherein the extruded sealing layer composition comprises a biodegradable material.

4 . The electrochemical device of claim 1 , wherein the extruded sealing layer composition comprises poly(ε-caprolactone) (PCL).

5 . The electrochemical device of claim 1 , wherein the extruded sealing layer composition comprises polylactic acid (PLA).

6 . The electrochemical device of claim 1 , wherein the extruded sealing layer composition comprises a biodegradable polymer, and a filler.

7 . The electrochemical device of claim 6 , wherein the biodegradable polymer comprises a particle having a particle size of from about 0.05 microns to about 250 microns.

8 . The electrochemical device of claim 6 , wherein the filler is present in the extruded sealing layer composition in an amount of from about 1.0% to about 30.0% based on a total weight of the extruded sealing layer composition.

9 . The electrochemical device of claim 6 , wherein the filler comprises cellulose, clay, mica, or a combination thereof.

10 . The electrochemical device of claim 1 , wherein the extruded sealing layer composition is disposed between the first substrate and the second substrate in a laterally non-continuous pattern.

11 . The electrochemical device of claim 1 , wherein the extruded sealing layer comprises a first portion and a second portion, the second portion comprising a thickness greater than that of the first portion.

12 . A sealing layer composition, comprising:
a biodegradable polymer; and a filler comprising cellulose, clay, mica, or a combination thereof, wherein:
the sealing layer composition is extruded.

13 . The composition of claim 12 , wherein the sealing layer composition is incorporated into an electrochemical device.

14 . The composition of claim 13 , wherein the electrochemical device comprises a battery.

15 . The composition of claim 12 , wherein the filler is present in the extruded sealing layer composition in an amount of from about 1.0% to about 30.0% based on a total weight of the extruded sealing layer composition.

16 . A method of producing a sealing layer for an electrochemical device, comprising:
preparing a substrate; dispensing a sealing layer composition from an extrusion dispenser onto the substrate; and drying the sealing layer composition; wherein the sealing layer forms a moisture barrier for the electrochemical device.

17 . The method of producing a sealing layer of claim 16 , further comprising subjecting the sealing layer to a higher temperature.

18 . The method of producing a sealing layer of claim 16 , further comprising dispensing two or more layers of sealing layer composition.

19 . The method of producing a sealing layer of claim 16 , wherein the sealing layer composition comprises a biodegradable polymer and a filler comprising cellulose, clay, mica, or a combination thereof.

20 . The method of producing a sealing layer of 16 , wherein the sealing layer composition has a viscosity from about 1,000 cP to about 1,000,000 cP.

Assignees

• Xerox Corp

Inventors

• Hu Nan-Xing
• Chopra Naveen
• Mcguire Gregory
• Zwartz Edward G
• Farrugia Valerie M

Classifications

• H01M50/186 Primary

  characterised by the disposition of the sealing members · CPC title

• H01M50/109

  of button or coin shape · CPC title

• H01M50/193

  Organic material · CPC title

• H01M50/195

  Composite material consisting of a mixture of organic and inorganic materials · CPC title

• H01M50/191 Primary

  Inorganic material · CPC title