Reduction-oxidation flow battery

Patent metadata

Field	Value
Publication number	US-10673089-B2
Application number	US-201716095482-A
Country	US
Kind code	B2
Filing date	Apr 21, 2017
Priority date	Apr 21, 2016
Publication date	Jun 2, 2020
Grant date	Jun 2, 2020

Abstract

A reduction-oxidation flow battery wherein the catholyte and/or the anolyte are selected from among respective defined groups of polyoxometalate compounds.

First claim

The invention claimed is:

1. A reduction-oxidation flow battery comprising:
a first electrolyte storage tank containing an anolyte, which comprises one of the following species:
(i) C 4 SiW 12 O 40 with cation C which is either: H + , Li + , Na + ; or a mixture thereof;
(ii) C 4 SiMo 12 O 40 with cation C which is either: H + , Li + , Na + ; or a mixture thereof;
(iii) C 3 PW 12 O 40 with cation C which is either: H + , Li + , Na + ; or a mixture thereof; or
(iv) C 5 AlW 12 O 40 with cation C which is either: H + , Li + , Na + ; or a mixture thereof; and
a second electrolyte storage tank containing a catholyte, which comprises one of the following species:
(i) C 6 V 10 O 28 with cation C which is either H + , Li + , Na + ; or a mixture thereof; or
(ii) C 9 PV 14 O 42 with cation C which is either H + , Li + , Na + ; or a mixture thereof.

2. A reduction-oxidation flow battery according to claim 1 wherein the anolyte is in aqueous solution with a supporting electrolyte of one or a mixture of:
(i) Na 2 SO 4
(ii) Li 2 SO 4
(iii) LiCH 3 COO or
(iv) NaCH 3 COO
(v) HCl
(vi) H 3 PO 4
(vii) H 2 SO 4 .

3. A reduction-oxidation flow battery according to claim 1 wherein the catholyte is provided in aqueous solution with a supporting electrolyte of one or a mixture of:
(i) Na 2 SO 4
(ii) Li 2 SO 4
(iii) LiCH 3 COO or
(iv) NaCH 3 COO
(v) HCl
(vi) H 3 PO 4
(vii) H 2 SO 4 .

4. A reduction-oxidation flow battery according to claim 1 wherein the ion selective membrane comprises a cation exchange membrane based on a perfluorosulfonic acid polymer membrane.

Assignees

• Siemens Ag

Inventors

• Hughes Timothy
• Stimming Ulrich
• Friedl Jochen

Classifications

• H01M8/188 Primary

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

• H01M8/0221

  Organic resins; Organic polymers · CPC title

• H01M2300/0011

  Sulfuric acid-based · CPC title

• H01M2300/0008

  Phosphoric acid-based · CPC title

• H01M8/08

  Fuel cells with aqueous electrolytes · CPC title