Journal
ADVANCED ENERGY MATERIALS
Volume 1, Issue 3, Pages 394-400Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201100008
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Funding
- Office of Electricity Delivery & Energy Reliability
- U.S. Department of Energy (DOE) [57558]
- Pacific Northwest National Laboratory (PNNL)
- DOE's Office of Biological and Environmental Research (BER)
- DOE by Battelle [DE-AC05 - 76RL01830]
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The all-vanadium redox flow battery is a promising technology for large-scale renewable and grid energy storage, but is limited by the low energy density and poor stability of the vanadium electrolyte solutions. A new vanadium redox flow battery with a significant improvement over the current technology is reported in this paper. This battery uses sulfate-chloride mixed electrolytes, which are capable of dissolving 2.5 M vanadium, representing about a 70% increase in energy capacity over the current sulfate system. More importantly, the new electrolyte remains stable over a wide temperature range of -5 to 50 C, potentially eliminating the need for electrolyte temperature control in practical applications. This development would lead to a significant reduction in the cost of energy storage, thus accelerating its market penetration.
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