US 8,771,856 B2 · Fe-V redox flow batteries

Abstract

A redox flow battery having a supporting solution that includes Cl− anions is characterized by an anolyte having V2+ and V3+ in the supporting solution, a catholyte having Fe2+ and Fe3+ in the supporting solution, and a membrane separating the anolyte and the catholyte. The anolyte and catholyte can have V cations and Fe cations, respectively, or the anolyte and catholyte can each contain both V and Fe cations in a mixture. Furthermore, the supporting solution can contain a mixture of SO42− and Cl− anions.

Claims18

Dependent claims

A redox flow battery system having:

A membrane separating an anolyte and a catholyte;
the anolyte comprising V2+ and V3+ in a negative supporting solution comprising an initial concentration of at least 0.5M Fe cations and Cl− anions;
the catholyte comprising Fe2+ and Fe3+ in a positive supporting solution comprising an initial concentration of at least 0.5M V cations and Cl− anions;
wherein the initial concentration of Fe cations in the negative supporting solution is substantially equal to the initial concentration of V cations in the positive supporting solution.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

12/892,698Filed 28 Sep 2010

Published

US 2012/0077067 A129 Mar 2012

Granted

8 Jul 2014

Term ends

Not estimatedThe source records don’t support an estimate.

Classification10 codes

H01M 8/184
Regenerative fuel cells, e.g. redox flow batteries or secondary fuel cells: regeneration by electrochemical means
H01M 8/188
Regeneration by electrochemical means: by recharging of redox couples containing fluids; Redox flow type batteries
H01M 8/20
Fuel cells; Manufacture thereof: indirect fuel cells, e.g. fuel cells with redox couple being irreversible
H01M 50/426
Synthetic resins, e.g. thermoplastics or thermosetting resins: fluorocarbon polymers

Fe-V redox flow batteries

Life of this patent

Fe-V redox flow batteries

Life of this patent

Abstract

Claims18