Redox flow battery

Patent metadata

Field	Value
Publication number	US-9577282-B2
Application number	US-201615004899-A
Country	US
Kind code	B2
Filing date	Jan 23, 2016
Priority date	Dec 31, 2010
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A redox flow battery. A metal-ligand coordination compound including an aromatic ligand that contains an electron withdrawing group is used as the catholyte and/or the anolyte so that a redox flow battery having high energy density and excellent charge/discharge efficiency may be provided.

First claim

What is claimed is:

1. A redox flow battery comprising:
a positive electrode cell comprising a positive electrode and a catholyte solution; a negative electrode cell comprising a negative electrode and an anolyte solution; and anion exchange membrane interposed between the positive electrode cell and the negative electrode cell, wherein the catholyte solution and the anolyte solution each include a solvent, a supporting electrolyte, and at least one metal-ligand coordination compound, wherein at least one of the metal-ligand coordination compounds includes a ligand that contains an electron withdrawing group, and wherein the electron withdrawing group is a halogen atom, an oxygen atom, a phosphorous atom, a sulfur atom, a nitro group, a nitrile group, or a phenyl group, wherein said ligand is aliphatic.

2. The redox flow battery of claim 1 , wherein a metal included in the metal-ligand coordination compound is at least one selected from the group consisting of Ni, Co, Fe, Ru, Zn, Mn, Y, Zr, Ti, Cr, Mg, Ce, Cu, Pb, and V.

3. The redox flow battery of claim 1 , wherein the ligand included in the metal-ligand coordination compound is at least one selected from the group consisting of acetylacetonate, ethylenediamine, and propylenediamine.

4. The redox flow battery of claim 1 , wherein the concentration of the metal-ligand coordination compound in the solution is in a range of about 0.1 M to about 3 M.

5. The redox flow battery of claim 1 , wherein the at least one metal-ligand coordination compound is at least one of compounds:

6. The redox flow battery of claim 1 , wherein the metal-ligand coordination compound is subject to a reversible oxidation and reduction reaction.

7. The redox flow battery of claim 1 , wherein the solvent is a non-aqueous solvent.

8. The redox flow battery of claim 7 , wherein the non-aqueous solvent is at least one selected from the group consisting of dimethylacetamide, diethylcarbonate, dimethylcarbonate, acetonitrile, γ-butyrolactone (GBL), propylene carbonate (PC), ethylene carbonate (EC), N-methyl-2-pyrrolidone (NMP), fluoroethylene carbonate, and N,N-dimethylacetamide.

9. The redox flow battery of claim 1 , further comprising BF 4 − , PF 6 , CF 3 SO 3 , or (CF 3 SO 2 ) 2 N − as a counter anion of the metal-ligand coordination compound.

10. The redox flow battery of claim 1 , wherein the supporting electrolyte comprises at least one selected from the group consisting of LiBF 4 , LiPF 6 , LiClO 4 , LiCF 3 SO 3 , Li(CF 3 SO 2 ) 2 N, TEABF 4 (triethylamine tetrafluorborate), TBABF 4 (tributhylamine tetrafluorborate), NaBF 4 , NaPF 6 , trimethylsulfonylchloride, and (NH 4 ) 2 SO 4 .

11. The redox flow battery of claim 1 , wherein the ion exchange membrane is an anion ion exchange membrane.

12. The redox flow battery of claim 11 , wherein the anion ion exchange membrane comprises an anion exchange membrane that is obtained by aminating a copolymer of styrene-divinylbenzene by introducing a chloromethyl group, an anion exchange membrane that is obtained by substituting a copolymer of vinylpyridine-divinyl benzene with quaternary pyridium, or an anion exchange membrane that is obtained by aminating an aromatic polysulfone copolymer by introducing a chloromethyl group.

13. The redox flow battery of claim 1 , further comprising a catholyte tank and an anolyte tank that are fluid-connected to the positive electrode cell and the negative electrode cell, respectively.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Park Joungwon
• Lee Myungjin
• Hwang Seungsik
• Lee Dooyeon
• Oh Dukjin

Classifications

• H01M8/188 Primary

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

• H01M8/20

  Indirect fuel cells, e.g. fuel cells with redox couple being irreversible (H01M8/18 takes precedence) · CPC title

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic

• H01M8/18

  Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells · CPC title

• Y02E60/528

  Cross-Sectional Technologies · mapped topic