Functional layer including layered double hydroxide, and composite material

Patent metadata

Field	Value
Publication number	US-11850837-B2
Application number	US-201816227397-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Jun 24, 2016
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

There is provided a functional layer including layered double hydroxide. The functional has an average porosity of 1 to 40% and an average pore diameter of 100 nm or less.

First claim

What is claimed is:

1. A functional layer comprising a layered double hydroxide, wherein the functional layer has an average porosity of 15 to 40% and an average pore diameter of 100 nm or less, and the average porosity and the average pore diameter are measured based on a polished cross-sectional image of the functional layer,
wherein the layered double hydroxide is composed of:
a plurality of basic hydroxide layers composed of Ni, Ti, and OH groups or composed of Ni, Ti, OH groups and incidental impurities; and intermediate lavers composed of anions and H 2 O, each intermediate layer being interposed between two adjacent basic hydroxide layers; or
a plurality of basic hydroxide layers comprising Ni, Al, Ti, and OH groups; and intermediate layers composed of anions and H 2 O, each intermediate layer being interposed between two adjacent basic hydroxide layers; and
wherein the functional layer has a helium permeability per unit area of 10 cm/min·atm or less.

2. The functional layer according to claim 1 , wherein the functional layer has an average porosity of 15 to 35% and an average pore diameter of 10 to 50 nm.

3. The functional layer according to claim 1 , wherein the functional layer has no cracks, and wherein the functional layer undergoes no cracking even when dried at 70° C. for 20 hours.

4. 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.

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

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

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

8. 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.

9. The composite material according to claim 8 , wherein the porous substrate is composed of at least one selected from the group consisting of ceramic materials, metallic materials, and polymeric materials.

10. The composite material according to claim 9 , wherein the composite material has a helium permeability per unit area of 10 cm/min·atm or less.

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

12. A battery comprising, as a separator, the composite material according to claim 9 .

Assignees

• Ngk Insulators Ltd

Inventors

• Yamamoto Sho
• FUJISAKI Megumi
• Yokoyama Shohei

Classifications

• C01G53/82

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

• B32B5/18 Primary

  characterised by features of a layer {of} foamed material · CPC title

• B32B9/00

  Layered products comprising a {layer of a} particular substance not covered by groups B32B11/00 - B32B29/00 · CPC title

• B32B9/005

  comprising one layer of ceramic material, e.g. porcelain, ceramic tile (layered products with at least two ceramic layers composed mainly of ceramic B32B18/00) · CPC title

• C01F7/00

  Compounds of aluminium · CPC title