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001019527 1001_ $$0P:(DE-HGF)0$$aKorshunov, Aleksandr$$b0
001019527 245__ $$aAn oxo-verdazyl radical for a symmetrical nonaqueous redox flow battery
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001019527 520__ $$aVerdazyl free radical compounds are promising candidates for symmetrical all-organic redox flow batteries(RFBs) due to their redox stability, the ease with which their chemical structure can be varied, and theirunique bipolar nature. The present work reports a preliminary screening of a selection of oxo-verdazylcompounds for key redox electrolyte parameters. Of the considered candidates, the 1,5-diphenyl-3-isopropyl-6-oxo-verdazyl radical performed best and is investigated in extensive RFB experiments tocompare its electrochemical behavior in cyclic voltammetry (CV) to that within an actual battery. Thesymmetrical oxo-verdazyl non-aqueous electrolyte RFB provides a mean voltage of 1.42 V anddemonstrates good stability as well as high coulombic (>97%) and energy efficiencies over more than100 charge/discharge cycles. The redox electrolyte is characterized at different stages within a singlecycle (‘state of charge’ experiments) independently for each half-cell. To address the specifics of theelectrolyte transition to RFB cell setup an ‘in-cell’ CV flow-enabled electrochemical study has beenconducted, introduced here as a new step towards standardization of the electrochemical description ofRFB electrolytes. The electrochemical performance results highlight oxo-verdazyls as versatile materialsfor energy applications and indicate great promise for their further development and optimization in thefield of RFBs.
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001019527 536__ $$0G:(GEPRIS)159705466$$aSFB 858 B11 - Kooperativität in organischen spintragenden Materialien und ihren Hybridsystemen: Steuerung magnetischer Eigenschaften durch Orientierung von Radikalen (B11) (159705466)$$c159705466$$x1
001019527 7001_ $$0P:(DE-HGF)0$$aMilner, Matthew James$$b1
001019527 7001_ $$0P:(DE-Juel1)166392$$aGrünebaum, Mariano$$b2$$ufzj
001019527 7001_ $$0P:(DE-HGF)0$$aStuder, Armido$$b3
001019527 7001_ $$0P:(DE-Juel1)166130$$aWinter, Martin$$b4$$eCorresponding author$$ufzj
001019527 7001_ $$0P:(DE-Juel1)171204$$aCekic-Laskovic, Isidora$$b5$$eCorresponding author$$ufzj
001019527 773__ $$0PERI:(DE-600)2702232-8$$p22280–22291$$tJournal of materials chemistry / A$$v8$$x2050-7488$$y2020
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