High-energy density redox-active eutectic liquid

Patent metadata

Field	Value
Publication number	US-11450889-B2
Application number	US-202016752133-A
Country	US
Kind code	B2
Filing date	Jan 24, 2020
Priority date	Jan 30, 2019
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

An electrochemical device includes: (1) a compartment; (2) a container including a liquid reactant; and (3) a conveyance mechanism fluidly connected to the container and the compartment and configured to convey the liquid reactant from the container into the compartment, wherein the liquid reactant is a eutectic mixture of two or more different redox-active substances.

First claim

What is claimed is:

1. An electrochemical device, comprising:
a compartment;
a container including a liquid reactant; and
a conveyance mechanism fluidly connected to the container and the compartment and configured to convey the liquid reactant from the container into the compartment,
wherein the liquid reactant is a eutectic mixture of two or more different redox-active substances.

2. The electrochemical device of claim 1 , wherein the eutectic mixture includes two or more different redox-active organic compounds.

3. The electrochemical device of claim 2 , wherein the eutectic mixture further includes a redox-active inorganic compound.

4. The electrochemical device of claim 2 , wherein the two or more different redox-active organic compounds include reducible functional groups.

5. The electrochemical device of claim 2 , wherein the two or more different redox-active organic compounds include ketone groups.

6. The electrochemical device of claim 2 , wherein the two or more different redox-active organic compounds each has a molecular weight up to or less than 250 g/mol.

7. The electrochemical device of claim 2 , wherein the two or more different redox-active organic compounds are selected from quinones.

8. The electrochemical device of claim 2 , wherein the two or more different redox-active organic compounds are selected from quinones, quinoxalines, quinolones, quinazolines, pyrazines, and combinations thereof.

9. The electrochemical device of claim 2 , wherein the two or more different redox-active organic compounds account for at least 70% by weight of the liquid reactant.

10. The electrochemical device of claim 1 , wherein the compartment, the container, the liquid reactant, and the conveyance mechanism are a first compartment, a first container, a first liquid reactant, and a first conveyance mechanism, respectively, and the electrochemical device further comprises:
a second compartment;
a second container including a second liquid reactant;
a second conveyance mechanism fluidly connected to the second container and the second compartment and configured to convey the second liquid reactant from the second container into the second compartment; and
an ion-exchange membrane or separator disposed between the first compartment and the second compartment.

11. A liquid reactant for an electrochemical device, comprising a eutectic mixture of two or more different redox-active organic compounds, wherein the two or more different redox-active organic compounds account for at least 70% by weight of the liquid reactant, and a melting temperature of the liquid reactant is below room temperature.

12. The liquid reactant of claim 11 , wherein the two or more different redox-active organic compounds include ketone groups.

13. The liquid reactant of claim 11 , wherein the two or more different redox-active organic compounds are selected from quinones.

14. The liquid reactant of claim 11 , wherein the two or more different redox-active organic compounds account for at least 80% by weight of the liquid reactant.

15. The liquid reactant of claim 11 , wherein the two or more different redox-active organic compounds account for at least 90% by weight of the liquid reactant.

16. The liquid reactant of claim 11 , further comprising a metal-containing salt.

17. A method of operating an electrochemical device, comprising conveying the liquid reactant of claim 11 into a compartment of the electrochemical device.

18. The method of claim 17 , wherein the liquid reactant is reduced in the compartment of the electrochemical device.

Assignees

• Univ Leland Stanford Junior

Inventors

• Baclig Antonio
• Chueh William C
• Poletayev Andrey
• Ng Victoria
• Ganapathi Devi
• Penn Emily

Classifications

• H01M10/0569 Primary

  characterised by the solvents · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M8/188 Primary

  by recharging of redox couples containing fluids; Redox flow type batteries · CPC title

• H01M50/20

  Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46) · CPC title