Hermetic seal in anode pouch for lithium-seawater electrochemical battery

Patent metadata

Field	Value
Publication number	US-12166247-B1
Application number	US-202117489946-A
Country	US
Kind code	B1
Filing date	Sep 30, 2021
Priority date	Sep 30, 2021
Publication date	Dec 10, 2024
Grant date	Dec 10, 2024

Abstract

A method is provided for making a ceramic lithium ion conducting membrane and for making an anode pouch for a lithium-seawater battery. The method for making the ceramic membrane includes adding pore formers into a liquid slurry of LTAP (Li 2 O—Al 2 O 3 —SiO 2 —P 2 O 5 —TiO 2 ) powder. The liquid slurry is converted into porous green tape and the porous green tape is laminated onto the top of nonporous green tapes to form a stack. The stack is sintered and the pore formers are decomposed to create pores in the top layer of the ceramic membrane. The porous ceramic membrane is used to create a more robust hermetic seal in an anode pouch for the battery compared to a seal made with a nonporous ceramic membrane.

First claim

What is claimed is:

1. A method of making an anode pouch for a lithium-seawater battery comprising:
providing a water impermeable ceramic lithium ion conducting membrane having a porous top layer, wherein the porous top layer has a plurality of substantially spherical shaped pores formed therein that intersect a top surface of the porous top layer to form pore openings; and
adhering the porous top layer of said ceramic lithium ion conducting membrane to an annular laminate face ring to provide a hermetic seal between the ceramic lithium ion conducting membrane and the annular laminate face ring;
wherein the annular laminate face ring comprises an aluminum layer, an adhesive layer on a first side of the aluminum layer, and an abrasion-resistant waterproof material layer on a second, opposite side of the aluminum layer;
wherein said step of adhering comprises:
melting the annular laminate face ring adhesive layer;
positioning the water impermeable ceramic lithium ion conducting membrane porous top layer against the melted adhesive layer whereby the melted adhesive enters the porous top layer pore openings; and
cooling the positioned water impermeable ceramic lithium ion conducting membrane and annular laminate face ring.

2. The method of claim 1 , further comprising adhering an annular laminate locking ring to said ceramic lithium ion conducting membrane on a bottom layer opposite said porous top layer.

3. The method of claim 1 , wherein:
the water impermeable ceramic lithium ion conducting membrane has a porous bottom layer, wherein the porous bottom layer has a plurality of substantially spherical shaped pores formed therein that intersect a bottom surface of the porous bottom layer to form pore openings; and
further comprising adhering an annular laminate locking ring to the ceramic lithium ion conducting membrane porous bottom layer.

Assignees

• Us Navy

Inventors

• Patrissi Charles J
• Rizzo Jennifer R
• Schumacher Christian R

Classifications

• H01M4/76

  Containers for holding the active material, e.g. tubes, capsules · CPC title

• H01M6/187

  Solid electrolyte characterised by the form · CPC title

• H01M6/34

  Immersion cells, e.g. sea-water cells · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M6/02 Primary

  Details (of electrodes H01M4/00; of non-active parts H01M50/00) · CPC title