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Title: Cascade redox flow battery systems

A reduction/oxidation ("redox") flow battery system includes a series of electrochemical cells arranged in a cascade, whereby liquid electrolyte reacts in a first electrochemical cell (or group of cells) before being directed into a second cell (or group of cells) where it reacts before being directed to subsequent cells. The cascade includes 2 to n stages, each stage having one or more electrochemical cells. During a charge reaction, electrolyte entering a first stage will have a lower state-of-charge than electrolyte entering the nth stage. In some embodiments, cell components and/or characteristics may be configured based on a state-of-charge of electrolytes expected at each cascade stage. Such engineered cascades provide redox flow battery systems with higher energy efficiency over a broader range of current density than prior art arrangements.
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Issue Date:
OSTI Identifier:
Enervault Corporation (Sunnyvale, CA) NETL
Patent Number(s):
Application Number:
Contract Number:
Resource Relation:
Patent File Date: 2011 Jan 07
Research Org:
Enervault Corporation, Sunnyvale, CA (United States)
Sponsoring Org:
Country of Publication:
United States

Works referenced in this record:

Redox Flow Battery
patent-application, May 2012

Synthesis of carbon nanotubes in graphite microchannels in gas-flow and submerged-in-liquid reactors
journal, August 2010

Modification of Daramic, microporous separator, for redox flow battery applications
journal, December 1992
  • Chieng, S. C.; Kazacos, M.; Skyllas-Kazacos, M.
  • Journal of Membrane Science, Vol. 75, Issue 1-2, p. 81-91
  • DOI: 10.1016/0376-7388(92)80008-8

Development of a 0.1 kW power accumulation pilot plant based on an Fe/Cr redox flow battery Part I. Considerations on flow-distribution design
journal, March 1994

Development of bipolar plates for fuel cells from graphite filled wet-lay material and a thermoplastic laminate skin layer
journal, March 2007

Synthesis of nanosized zirconium carbide by a sol–gel route
journal, January 2007
  • Dollé, Mickael; Gosset, Dominique; Bogicevic, Christine
  • Journal of the European Ceramic Society, Vol. 27, Issue 4, p. 2061-2067
  • DOI: 10.1016/j.jeurceramsoc.2006.06.005

Reticulated vitreous carbon as an electrode material
journal, January 2004

Possible use of vanadium redox-flow batteries for energy storage in small grids and stand-alone photovoltaic systems
journal, March 2004

Optimization studies on a Fe/Cr redox flow battery
journal, January 1992

Bipolar plates for PEM fuel cells
journal, May 2003

Overcharge in the vanadium redox battery and changes in electrical resistivity and surface functionality of graphite-felt electrodes
journal, November 1994

Injection moulding of graphite composite bipolar plates
journal, March 2006

Redox flow cells for energy conversion
journal, September 2006
  • Ponce de Leon, C.; Frias-Ferrer, A.; Gonzalez-Garcia, J.
  • Journal of Power Sources, Vol. 160, Issue 1, p. 716-732
  • DOI: 10.1016/j.jpowsour.2006.02.095