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Title: Redox flow batteries based on supporting solutions containing chloride

Redox flow battery systems having a supporting solution that contains Cl.sup.- ions can exhibit improved performance and characteristics. Furthermore, a supporting solution having mixed SO.sub.4.sup.2- and Cl.sup.- ions can provide increased energy density and improved stability and solubility of one or more of the ionic species in the catholyte and/or anolyte. According to one example, a vanadium-based redox flow battery system is characterized by an anolyte having V.sup.2+ and V.sup.3+ in a supporting solution and a catholyte having V.sup.4+ and V.sup.5+ in a supporting solution. The supporting solution can contain Cl.sup.- ions or a mixture of SO.sub.4.sup.2- and Cl.sup.- ions.
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Issue Date:
OSTI Identifier:
Battelle Memorial Institute (Richland, WA) PNNL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2010 Sep 28
Research Org:
PNNL (Pacific Northwest National Laboratory (PNNL), Richland, WA (United States))
Sponsoring Org:
Country of Publication:
United States

Other works cited in this record:

Electrically rechargeable REDOX flow cell
patent, December 1976

Redox battery including a bromine positive electrode and a chromium ion negative electrode, and method
patent, September 1984

All-vanadium redox battery
patent, November 1988

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patent, March 1989

Stabilized vanadium electrolyte solutions for all-vanadium redox cells and batteries
patent, May 2003

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patent, January 2008

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patent-application, July 2003

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patent-application, November 2005

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patent-application, August 2006

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patent-application, November 2008

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journal, October 2003

Progress in Flow Battery Research and Development
journal, June 2011
  • Skyllas-Kazacos, M.; Chakrabarti, M. H.; Hajimolana, S. A.
  • Journal of The Electrochemical Society, Vol. 158, Issue 8, p. R55-R79
  • DOI: 10.1149/1.3599565

Investigation of the V(V)/V(IV) system for use in the positive half-cell of a redox battery
journal, October 1985

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