CO2 based and hydrogen based compounds for redox flow battery

Patent metadata

Field	Value
Publication number	US-11682785-B1
Application number	US-202217577569-A
Country	US
Kind code	B1
Filing date	Jan 18, 2022
Priority date	Jan 18, 2022
Publication date	Jun 20, 2023
Grant date	Jun 20, 2023

Abstract

Flow cell batteries and methods of producing an electric current are provided. In some implementations, a flow cell battery includes an electrochemical cell including an ion exchange membrane, an anode current collector, and a cathode current collector. The space between the ion exchange membrane and the anode current collector forms a first channel and the space between the ion exchange membrane and the cathode current collector forms a second channel. The ion exchange membrane is configured to allow ions to pass between the first and second channel. The battery includes a first tank configured to flow an anolyte through the first channel, wherein the anolyte is hydrogen gas. The battery includes a second tank configured to flow a catholyte through the second channel, wherein the catholyte is a compound that can be reversibly hydrogenated and dehydrogenated. The flow cell battery can be used to generate electric current.

First claim

What is claimed is:

1. A flow cell battery, comprising:
an electrochemical cell, wherein the electrochemical cell comprises
an ion exchange membrane,
an anode current collector, and
a cathode current collector, wherein a space between the ion exchange membrane and the anode current collector forms a first channel, a space between the ion exchange membrane and the cathode current collector forms a second channel, and wherein the ion exchange membrane is configured to allow ions to pass between the first channel and the second channel;

a first tank configured to flow an anolyte through the first channel, wherein the anolyte comprises hydrogen gas; and
a second tank configured to flow a catholyte through the second channel, wherein the catholyte comprises a compound that can be reversibly hydrogenated and dehydrogenated,

wherein the catholyte comprises oxalic acid.

2. The flow cell battery of claim 1 , wherein the anolyte comprises at least one of oxalic acid, a CO 2 based compound, or a compound that can be reversibly hydrogenated/dehydrogenated, or any combination thereof.

3. The flow cell battery of claim 1 , further comprising a third tank in fluid communication with the first tank and configured to hold the hydrogen gas.

4. The flow cell battery of claim 1 , wherein the anode current collector comprises a carbon-based electrode.

5. The flow cell battery of claim 1 , wherein the cathode current collector comprises a carbon-based electrode.

6. The flow cell battery of claim 1 , wherein the first channel comprises a porous electrode material.

7. The flow cell battery of claim 6 , wherein the porous electrode material comprises felt or Rainey nickel.

8. The flow cell battery of claim 1 , wherein the second channel comprises a porous electrode material.

9. The flow cell battery of claim 8 , wherein the porous electrode material comprises felt or Rainey nickel.

10. The flow cell battery of claim 1 , further comprising a load connected to the anode current collector and the cathode current collector.

11. The flow cell battery of claim 1 , further comprising a power supply connected to the anode current collector and the cathode current collector.

12. The flow cell battery of claim 1 , further comprising one or more pumps configured to pump the anolyte through the first channel and to pump the catholyte through the second channel.

13. A method of producing electric current, comprising:
flowing an anolyte through a first channel in an electrochemical cell, wherein the first channel is formed in a space between an anode current collector and an ion exchange membrane, wherein the anolyte comprises hydrogen gas;
flowing a catholyte through a second channel in the electrochemical cell, wherein the second channel is formed in a space between a cathode current collector and the ion exchange membrane, wherein the first channel and the second channel are separated by an ion exchange membrane, and wherein the catholyte comprises a compound that can be reversibly hydrogenated;
flowing ions through the ion exchange membrane to oxidize the anolyte and reduce the catholyte; and
generating an electric current between the anode current collector and the cathode current collector,
wherein the catholyte comprises oxalic acid.

14. The method of claim 13 , wherein the catholyte comprises at least one of oxalic acid, a CO 2 based compound, or a compound that can be reversibly hydrogenated/dehydrogenated, or any combination thereof.

15. The method of claim 13 , further comprising regenerating the anolyte and catholyte by applying an electric current from a power source to the anode current collector and the cathode current collector to reverse oxidation of the anolyte and reduction of the catholyte.

Assignees

• Saudi Arabian Oil Co

Inventors

• Hammad Ahmad D
• Amr Issam T
• Al Sadat Wajdi Issam

Classifications

• H01M2004/8684

  Negative electrodes · CPC title

• H01M2004/8689

  Positive electrodes · CPC title

• H01M8/188 Primary

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

• H01M4/98

  Raney-type electrodes · CPC title

• H01M4/96

  Carbon-based electrodes · CPC title