Metal-air cells with minimal air access

Patent metadata

Field	Value
Publication number	US-2023006286-A1
Application number	US-202117365328-A
Country	US
Kind code	A1
Filing date	Jul 1, 2021
Priority date	Jul 1, 2021
Publication date	Jan 5, 2023
Grant date	—

Abstract

A battery includes an air cathode, an anode, an aqueous electrolyte, and a housing, wherein, the housing includes one or more air access ports defining a total vent area, the battery exhibit a current density, a ratio of current density to total vent area is greater than about 100 mA/mm2, and the aqueous electrolyte comprises an amphoteric fluorosurfactant.

First claim

1 . A battery comprising an air cathode, an anode, an aqueous electrolyte, and a housing, wherein:
the housing comprises one or more air access ports defining a total vent area; the battery exhibits a cell limiting current at 0.9V and a cell limiting current at 1.15V; the ratio of cell limiting current at 1.15 V to cell limiting current at 0.9V is greater than about 0.6; and the aqueous electrolyte comprises an amphoteric fluorosurfactant.

2 . The battery of claim 1 , wherein the ratio is greater than about 0.75.

3 . The battery of claim 1 , wherein the ratio is from about 0.6 to about 0.9.

4 . The battery of claim 1 having a nominal diameter of about 8 mm and a nominal height of about 5.4 mm.

5 . The battery of claim 1 having a nominal diameter of about 8 mm and a nominal height of about 3.6 mm.

6 . The battery of claim 1 , wherein the battery has a nominal external volume from about 180 mm 3 to about 270 mm 3 .

7 . The battery of claim 1 , wherein the battery has a nominal electrode interfacial area that is about 35 mm 2 .

8 . The battery of claim 1 , wherein the total vent area is from about 0.030 mm 2 to about 0.13 mm 2 .

9 . The battery of claim 1 , wherein the cell limiting current at 1.15 V is about 4 mA to about 15 mA.

10 . A battery comprising an air cathode, an anode, an aqueous electrolyte, and a housing, wherein:
the housing comprises one or more air access ports defining a total vent area; the battery has an interfacial surface area between the anode and cathode; a ratio of vent area to interfacial area is about 3×10 −3 or smaller, provided that when the battery is a size 13 battery then the ratio is about 2.4×10 −3 or smaller; and the aqueous electrolyte comprises an amphoteric fluorosurfactant.

11 . The battery of claim 10 , wherein the ratio is from about 1.0×10 −3 to about 3.0×10 −3 , and wherein the battery is not a size 13 battery.

12 . The battery of claim 10 , wherein the ratio is from about 1.0×10 −3 to about 2.4×10 −3 .

13 . The battery of claim 10 , wherein the ratio is from about 1.4×10 −3 to about 3.0×10 −3 , and wherein the battery is not a size 13 battery.

14 . The battery of claim 10 having a nominal diameter of about 8 mm and a nominal height of about 5.4 mm.

15 . The battery of claim 10 having a nominal diameter of about 8 mm and a nominal height of about 3.6 mm.

16 . The battery of claim 10 , wherein the battery has a nominal external volume from about 180 mm 3 to about 270 mm 3 .

17 . The battery of claim 10 , wherein the battery has a nominal electrode interfacial area from about 25 to 50 mm 2 .

18 . The battery of claim 10 , wherein a total vent area is from about 0.030 mm 2 to about 0.115 mm 2 .

Assignees

• Energizer Brands Llc

Inventors

• Rubsam Tony
• Kania John
• Proffit Danielle
• Kerr Katharine
• Syvertsen Marc
• Pozdol Ian

Classifications

• H01M2300/0014

  Alkaline electrolytes · CPC title

• H01M50/1385

  Hybrid cells · CPC title

• H01M12/06 Primary

  with one metallic and one gaseous electrode · CPC title

• H01M6/045

  characterised by aqueous electrolyte · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title