Sheet-type air cell, method for manufacturing the same, and patch

Patent metadata

Field	Value
Publication number	US-2019348730-A1
Application number	US-201816347624-A
Country	US
Kind code	A1
Filing date	Mar 12, 2018
Priority date	Sep 28, 2017
Publication date	Nov 14, 2019
Grant date	—

Abstract

One aspect of the sheet-like air cell of the present invention includes a positive electrode having a catalyst layer, a negative electrode, a separator, and an electrolyte solution that are housed in a sheet-like outer case. The electrolyte solution is an aqueous solution that contains an electrolyte salt and has a pH of 3 or more and less than 12. The electrolyte solution contains a water-soluble high-boiling solvent with a boiling point of 150° C. or more in an amount of 3 to 30% by mass of the total solvent. Another aspect of the sheet-like air cell of the present invention includes a positive electrode having a catalyst layer, a negative electrode, a separator, and an electrolyte that are housed in a sheet-like outer case. The electrolyte is obtained by blending an electrolyte solution and a thickening agent. The electrolyte solution is an aqueous solution that contains an electrolyte salt and has a pH of 3 or more and less than 12.

First claim

1 .- 3 . (canceled)

4 . A sheet-type air cell comprising:
a positive electrode having a catalyst layer, a negative electrode, a separator, and an electrolyte that are contained in a sheet-type outer case, wherein the electrolyte is obtained by blending an electrolyte solution and a thickening agent, and the electrolyte solution is an aqueous solution that contains an electrolyte salt and has a pH of 3 or more and less than 12.

5 . The sheet-type air cell according to claim 4 , wherein the thickening agent has a functional group in a molecule, the functional group including a carboxyl group or its salt.

6 .- 7 . (canceled)

8 . The sheet-type air cell according to claim 4 , wherein the thickening agent is polysaccharide or polyalkylene glycol having a molecular weight of 1000 or more.

9 . The sheet-type air cell according to claim 8 , wherein the thickening agent is a cellulose derivative.

10 . The sheet-type air cell according to claim 9 , wherein the cellulose derivative is carboxymethyl cellulose with a degree of etherification of 0.9 or more.

11 . The sheet-type air cell according to claim 4 , wherein the electrolyte further contains a water-soluble high-boiling solvent that has a boiling point of 150° C. or more.

12 . The sheet-type air cell according to claim 4 , having a thickness of 1 mm or less.

13 . (canceled)

14 . A patch being wearable and comprising the sheet-type air cell according to claim 4 as a power supply.

15 . The sheet-type air cell according to claim 4 , wherein the negative electrode is formed of a metal sheet with a thickness of 10 to 500 μm.

16 . The sheet-type air cell according to claim 15 , wherein the metal sheet is zinc foil or zinc alloy foil.

17 . The sheet-type air cell according to claim 16 , wherein the metal sheet is zinc alloy foil containing bismuth.

18 . The sheet-type air cell according to claim 15 , wherein the metal sheet has a portion serving as an active material and a lead portion.

19 . The sheet-type air cell according to claim 4 , wherein a concentration of the electrolyte salt in the electrolyte solution is 5 to 50% by mass.

20 . The sheet-type air cell according to claim 4 , wherein the electrolyte solution contains a salt of a strong acid and a weak base as the electrolyte salt.

21 . The sheet-type air cell according to claim 4 , wherein the electrolyte solution contains an ammonium salt as the electrolyte salt.

22 . The sheet-type air cell according to claim 11 , wherein the electrolyte contains polyhydric alcohol or polyalkylene glycol having a molecular weight of 600 or less as the water-soluble high-boiling solvent.

23 . The sheet-type air cell according to claim 11 , wherein the water-soluble high-boiling solvent has a surface tension of 30 mN/m or more and a relative dielectric constant of 30 or more.

24 . The sheet-type air cell according to claim 4 , wherein the aqueous solution has a pH of less than 7.

Assignees

• Maxell Holdings Ltd

Inventors

• Furutani Takahiro
• Ono Hiroaki

Classifications

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M12/06 Primary

  with one metallic and one gaseous electrode · CPC title

• H01M12/02

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

• H01M2300/0085

  Immobilising or gelification of electrolyte · CPC title

• H01M2300/0011

  Sulfuric acid-based · CPC title