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Redox flow batteries based on supporting solutions containing chloride

Patent ·
OSTI ID:1117698
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.
Research Organization:
PNNL (Pacific Northwest National Laboratory (PNNL), Richland, WA (United States))
Sponsoring Organization:
USDOE
DOE Contract Number:
AC05-76RL01830
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Number(s):
8,628,880
Application Number:
12/892,693
OSTI ID:
1117698
Country of Publication:
United States
Language:
English

References (3)

Investigation of the V(V)/V(IV) system for use in the positive half-cell of a redox battery journal October 1985
Novel vanadium chloride/polyhalide redox flow battery journal October 2003
Progress in Flow Battery Research and Development journal June 2011

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