Functional layer including layered double hydroxide, and composite material

Patent metadata

Field	Value
Publication number	US-10773486-B2
Application number	US-201816227331-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Jun 24, 2016
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

A battery including, as a separator, a functional layer including a layered double hydroxide that contains Ni, Al, Ti and Zn, and has an atomic ratio Zn/(Ni+Ti+AI+Zn) of 0.04 or more determined by an energy dispersive X-ray analysis (EDS).

First claim

What is claimed is:

1. A functional layer comprising a layered double hydroxide that comprises Ni, Al, Ti and Zn, and has an atomic ratio Zn/(Ni+Ti+Al+Zn) of 0.04 or more determined by an energy dispersive X-ray analysis (EDS).

2. The functional layer according to claim 1 , wherein the atomic ratio Zn/(Ni+Ti+Al+Zn) is 0.04 to 0.25.

3. The functional layer according to claim 1 , wherein the functional layer has a hydroxide ion conductivity.

4. The functional layer according to claim 1 , wherein the functional layer has an ion conductivity of 2.6 mS/cm or more.

5. The functional layer according to claim 1 , wherein the layered double hydroxide undergoes no change in surface microstructure and crystalline structure when immersed in a 6 mol/L aqueous potassium hydroxide solution containing zinc oxide in a concentration of 0.4 mol/L at 70° C. for three weeks.

6. The functional layer according to claim 1 , wherein the functional layer has a helium permeability per unit area of 10 cm/min·atm or less.

7. The functional layer according to claim 1 , wherein the functional layer has a thickness of 100 μm or less.

8. The functional layer according to claim 1 , wherein the functional layer has a thickness of 50 μm or less.

9. The functional layer according to claim 1 , wherein the functional layer has a thickness of 5 μm or less.

10. A composite material comprising:
a porous substrate; and
a functional layer according to claim 1 provided on the porous substrate and/or embedded in the porous substrate.

11. The composite material according to claim 10 , wherein the porous substrate is composed of at least one selected from the group consisting of ceramic materials, metallic materials, and polymeric materials.

12. A battery comprising, as a separator, the functional layer according to claim 1 .

13. A battery comprising, as a separator, the composite material according to claim 10 .

Assignees

• Ngk Insulators Ltd

Inventors

• Yamamoto Sho
• Yokoyama Shohei

Classifications

• H01M50/497

  Ionic conductivity · CPC title

• H01M50/491

  Porosity · CPC title

• H01M50/489

  Separators, membranes, diaphragms or spacing elements inside the cells, characterised by their physical properties, e.g. swelling degree, hydrophilicity or shut down properties · CPC title

• H01M50/403

  Manufacturing processes of separators, membranes or diaphragms · CPC title

• C01G53/82

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title