Materials for high-performance aqueous organic redox flow batteries

Patent metadata

Field	Value
Publication number	US-2021119240-A1
Application number	US-202017078633-A
Country	US
Kind code	A1
Filing date	Oct 23, 2020
Priority date	Sep 30, 2016
Publication date	Apr 22, 2021
Grant date	—

Abstract

Quinones and related compounds for use in flow batteries are provided. Many of these compounds are found to mitigate the effects of crossover in a flow battery. Other structure for improving battery performance is provided.

First claim

1 - 14 . (canceled)

15 . A flow battery comprising:
a positive electrode; a positive electrode electrolyte including water and a first redox couple, the positive electrode electrolyte flowing over and contacting the positive electrode, the first redox couple including an organic compound having formula II and a reduction product of the organic compound, the organic compound having formula II being reduced during discharge; a negative electrode; and a negative electrode electrolyte including water and a second redox couple, the negative electrode electrolyte flowing over and contacting the positive electrode, the second redox couple also including an organic compound having formula II, a reduction product of the organic compound having formula I being oxidized to the organic compound during discharge:
A-X—B  II

wherein:
A is a substituted or unsubstituted flavins with substituents, quinoxaline with and without substituents, substituted anthraquinones, and substituted naphthaquinones; and
B is a substituted quinone.

16 . The flow battery of claim 15 further comprising an ion exchange membrane interposed between the positive electrode and the negative electrode.

17 . The flow battery of claim 16 wherein the ion exchange membrane has an equivalent weight greater than 1000 with respect to protogenic groups.

18 . The flow battery of claim 15 wherein the positive electrode and/or the negative electrode include multi-walled carbon nanotubes.

19 . The flow battery of claim 15 wherein the positive electrode and the negative electrode each independently includes water-soluble materials.

20 . The flow battery of claim 19 wherein the water-soluble materials include carbon and a binder material.

21 . The flow battery of claim 15 wherein the positive electrode electrolyte and the negative electrode electrolyte each independently include a molecule with different redox properties in various ranges of potentials.

22 . A flow battery comprising:
a positive electrode; a positive electrode electrolyte including water and a first redox couple, the positive electrode electrolyte flowing over and contacting the positive electrode, the first redox couple including a first organic compound and a reduction product of the first organic compound, the first organic compound being reduced during discharge: a negative electrode; and a negative electrode electrolyte including water and a second redox couple, the negative electrode electrolyte flowing over and contacting the positive electrode, the second redox couple also including a second organic compound, a reduction product of the second organic compound being oxidized to the second organic compound during discharge, one or both of the first organic compound and the second organic compound including a compound selected from the group consisting of:

and combinations thereof
wherein R 4 , R 5 , R 6 , and R 7 are each independently H,

—SO 3 H, —SO 3 Na, —SO 3 K, —CO 2 H, —CO 2 Na, —CO 2 K, —OH, —OMe, alkyl, (CH 2 CH 2 O) n OMe, NH 2 , NMe 2 , I, Cl, Br, F, —CF 3 , —CF 2 H, —NO 2 , —N(R) 3 + X 1 − , CCl 3 , —CN, —PO 3 H 2 , —COOH, —O − M + 2 , —SO 3 −1 M + , —PO 3 2− M + 2 , —COO − M + , —COOR, —CHO, or —COR where R is H or C 1-10 alkyl, M + is a positively charged counter-ion, and X 1 − is a negatively charge counter-ion.

23 . A flow battery comprising:
a positive electrode; a positive electrode electrolyte including water and a first redox couple, the positive electrode electrolyte flowing over and contacting the positive electrode, the first redox couple including a first organic compound and a reduction product of the first organic compound, the first organic compound being reduced during discharge: a negative electrode; and a negative electrode electrolyte including water and a second redox couple, the negative electrode electrolyte flowing over and contacting the positive electrode, the second redox couple also including a second organic compound, a reduction product of the second organic compound being oxidized to the second organic compound during discharge, one or both of the first organic compound and the second organic compound including a compound selected from the group consisting of:

and combinations thereof.

24 . The flow battery of claim 23 further comprising an ion exchange membrane interposed between the positive electrode and the negative electrode.

25 . The flow battery of claim 24 wherein the ion exchange membrane has an equivalent weight greater than 1000 with respect to protogenic groups.

26 . The flow battery of claim 23 wherein the positive electrode and/or the negative electrode include multi-walled carbon nanotubes.

Assignees

• Univ Southern California

Inventors

• Narayan Sri
• Prakash Surya G
• Aniszfeld Robert
• Yang Bo
• Hoober-Burkhardt Lena
• Krishnamoorthy Sankarganesh
• Murali Advaith
• Nirmalchandar Archith

Classifications

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title

• H01M4/96

  Carbon-based electrodes · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H01M2300/0014

  Alkaline electrolytes · CPC title

• H01M8/188 Primary

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