High-Performance Aqueous Organic Flow Battery with Quinone-Based Redox Couples at Both Electrodes

By Bo Yang, Lena E. Hoober-Burkhardt, Sankarganesh Krishnamoorthy, A. Murali, G. Prakash, S. Narayanan. 2016

177 citations recorded by the source corpus.

We have demonstrated the repeated cycling of a redox flow cell based on water-soluble organic redox couples (ORBAT) at high voltage efficiency, coulombic efficiency and power density. These cells were successfully operated with 4,5-dihydroxybenzene-1,3-disulfonic acid (BQDS) at the positive electrode and anthraquinone-2,6-disulfonic acid (AQDS) at the negative electrode. Reduction of the voltage losses arising from mass transport limitations, and understanding of the chemical transformations of BQDS during charginghaveledtotheseimprovementsinperformance.Thespecificadvancesreportedhereincludetheuseoforganicredoxcouplesinthefree-acidform,improvementstotheflowfieldconfiguration,andnovelhigh-surface-areagraphite-feltelectrodestructures.WehaveidentifiedvariousstepsinthechemicalandelectrochemicaltransformationsofBQDSduringthefirstfewcycles.Wehave alsoconfirmedthatthecrossoverofthereactantsthroughthemembranewasnotsignificant.TheperformanceimprovementsandnewunderstandingpresentedherewillhastenthedevelopmentofORBATasaninexpensiveandsustainablesolutionforlarge-scale electricalenergystorage.©TheAuthor

Subfields: Automotive Engineering, Electrical and Electronic Engineering, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/967c3f1995dac76a56f80ff29ae9bd3d006aae10

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In Automotive Engineering

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