Redox and ion-adsorption electrodes and energy storage devices

Patent metadata

Field	Value
Publication number	US-11316146-B2
Application number	US-202016866643-A
Country	US
Kind code	B2
Filing date	May 5, 2020
Priority date	Feb 1, 2018
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

Provided herein are energy storage devices comprising a first electrode comprising a layered double hydroxide, a conductive scaffold, and a first current collector; a second electrode comprising a hydroxide and a second current collector; a separator; and an electrolyte. In some embodiments, the specific combination of device chemistry, active materials, and electrolytes described herein form storage devices that operate at high voltage and exhibit the capacity of a battery and the power performance of supercapacitors in one device.

First claim

What is claimed is:

1. An electrode comprising:
(a) a layered double hydroxide;
(b) a three-dimensional graphene-based conductive scaffold; and
(c) a current collector;
wherein the layered double hydroxide comprises a metallic layered double hydroxide comprising a zinc-based layered double hydroxide, an iron-based layered double hydroxide, an aluminum-based layered double hydroxide, a chromium-based layered double hydroxide, an indium-based layered double hydroxide, a manganese-based layered double hydroxide, or any combination thereof.

2. The electrode of claim 1 , wherein the three-dimensional graphene-based conductive scaffold comprises conductive foam, conductive aerogel, graphene foam, graphite foam, graphene aerogel, graphite aerogel, or any combination thereof.

3. The electrode of claim 2 , wherein the layered double hydroxide is a zinc-based layered double hydroxide and wherein the three-dimensional graphene-based conductive scaffold comprises a graphene aerogel.

4. The electrode of claim 1 , wherein the current collector comprises a conductive foam.

5. The electrode of claim 4 , wherein the conductive foam comprises aluminum foam, carbon foam, graphene foam, graphite foam, copper foam, nickel foam, palladium foam, platinum foam, steel foam, or any combination thereof.

6. The electrode of claim 1 , wherein the three-dimensional graphene-based conductive scaffold comprises a metallic ionogel.

7. The electrode of claim 6 , wherein the metallic ionogel comprises carbon ionogel, graphene ionogel, graphite ionogel, a conductive polymer, a conductive ceramic, or any combination thereof.

8. The electrode of claim 1 , wherein a mass ratio between the layered double hydroxide and the three-dimensional graphene-based conductive scaffold is about 0.2:1 to about 2.4:1.

9. The electrode of claim 1 , wherein a mass ratio between the layered double hydroxide and the three-dimensional graphene-based conductive scaffold is at least about 0.2:1.

10. The electrode of claim 1 , wherein a mass ratio between the layered double hydroxide and the three-dimensional graphene-based conductive scaffold is at most about 2.4:1.

Assignees

• Univ California

Inventors

• El-Kady Maher F
• Kaner Richard B
• Mousavi Mir Fazlollah

Classifications

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/32 Primary

  Nickel oxide or hydroxide electrodes · CPC title

• H01M4/48

  of inorganic oxides or hydroxides · CPC title

• H01M4/521

  of iron for aqueous cells · CPC title

• H01M4/52

  of nickel, cobalt or iron · CPC title