Battery using layered double hydroxide-like compound

Patent metadata

Field	Value
Publication number	US-2023207888-A1
Application number	US-202318175751-A
Country	US
Kind code	A1
Filing date	Feb 28, 2023
Priority date	Nov 30, 2020
Publication date	Jun 29, 2023
Grant date	—

Abstract

Provided is a battery including a positive electrode; a negative electrode; an electrolytic solution being an aqueous alkali metal hydroxide solution; and a layered double hydroxide (LDH)-like compound provided so as to be in contact with the electrolytic solution. A metal compound containing at least one metal element constituting the LDH-like compound is dissolved in the electrolytic solution such that erosion of the LDH-like compound by the electrolytic solution is suppressed.

First claim

What is claimed is:

1 . A battery with a layered double hydroxide (LDH)-like compound, the battery comprising:
a positive electrode; a negative electrode; an electrolytic solution being an aqueous alkali metal hydroxide solution; and an LDH-like compound provided so as to be in contact with the electrolytic solution, wherein a metal compound containing at least one metal element constituting the LDH-like compound is dissolved in the electrolytic solution such that erosion of the LDH-like compound by the electrolytic solution is suppressed.

2 . The battery according to claim 1 , wherein the LDH-like compound is:
(a) a hydroxide and/or an oxide with a layered crystal structure, containing: Mg; and one or more elements, which include at least Ti, selected from the group consisting of Ti, Y, and Al, or (b) a hydroxide and/or an oxide with a layered crystal structure, comprising (i) Ti, Y, and optionally Al and/or Mg, and (ii) at least one additive element M selected from the group consisting of In, Bi, Ca, Sr, and Ba, or (c) a hydroxide and/or an oxide with a layered crystal structure, comprising Mg, Ti, Y, and optionally Al and/or In, wherein in (c) the LDH-like compound is present in a form of a mixture with In(OH) 3 .

3 . The battery according to claim 1 , wherein the aqueous alkali metal hydroxide solution is an aqueous potassium hydroxide solution.

4 . The battery according to claim 1 , wherein the metal element is dissolved in the electrolytic solution in the form of a metal ion, a hydroxide, and/or a hydroxy complex.

5 . The battery according to claim 1 , wherein the metal compound is preliminarily dissolved in the electrolytic solution.

6 . The battery according to claim 1 , wherein the LDH-like compound comprises Al, and wherein the metal compound comprises Al.

7 . The battery according to claim 1 , wherein the metal compound is aluminum hydroxide and/or γ-alumina.

8 . The battery according to claim 6 , wherein the electrolytic solution has an Al concentration of 0.1 mol/L or more.

9 . The battery according to claim 6 , wherein the electrolytic solution has an Al concentration of 2.0 mol/L or more.

10 . The battery according to claim 1 , wherein the battery comprises the LDH-like compound as a separator exhibiting hydroxide ion conductivity, and the separator separates the positive electrode from the negative electrode.

11 . The battery according to claim 10 , wherein the separator further comprises an additional material other than the LDH-like compound.

12 . The battery according to claim 11 , wherein the additional material is a polymer.

13 . The battery according to claim 11 , wherein the separator is densified to exhibit water impermeability and gas impermeability.

14 . The battery according to claim 10 , wherein the separator further comprises a porous substrate, and the LDH-like compound plugs pores in the porous substrate.

15 . The battery according to claim 14 , wherein the porous substrate is composed of a polymer material.

16 . The battery according to claim 1 , wherein the negative electrode is coated with the LDH-like compound.

Assignees

• Ngk Insulators Ltd

Inventors

• Yokoyama Shohei
• Yamamoto Sho
• Yamada Naohito
• Inukai Naoko

Classifications

• H01M50/491 Primary

  Porosity · CPC title

• H01M50/446

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

• H01M10/26 Primary

  Selection of materials as electrolytes · CPC title

• H01M2300/0014

  Alkaline electrolytes · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title