Increasing the energy density of the non-aqueous vanadium redox flow battery with the acetonitrile-1,3-dioxolane–dimethyl sulfoxide solvent mixture

Herr, Tatjana; Fischer, P.; Tübke, Jens; Pinkwart, Karsten; Elsner, Peter

doi:10.1016/j.jpowsour.2014.04.141

Cited by 46 publications

(49 citation statements)

References 40 publications

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“…[270][271][272][273][274] [272] Acurrentefficiencyof 70 %a nd an energy efficiencyo f3 5% were found for this system. Thel ow current efficiencyw as obtained as ar esult of asidereaction of [V(acac) 3 ], which takes place in the presence of small amounts of water remaining in the solutions:…”

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confidence: 99%

“…[275][276][277] Herr et al [273] were able to confirm this experimentally.Amechanism for ligand exchange was described by Watanabe et al [278] There are two different routes in this mechanism ( Figure 10 3 ]i no ther solventsi n af lowc ell,w ith and withoutc onvectiono ft he electrolytes. [273,274] Therein different solvent mixtures,a mongst other things,w ere investigated.Amixtureo fa cetonitrile,1 ,3-dioxolane,a nd dimethyl sulfoxide (ADD)r esulted in ahigher solubilityo ft he [V(acac) 3 ], wherebyatheoreticalm aximum energy densityequivalenttothatinaVRFBcould be achieved.…”

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confidence: 99%

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The Chemistry of Redox‐Flow Batteries

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The development of various redox-flow batteries for the storage of fluctuating renewable energy has intensified in recent years because of their peculiar ability to be scaled separately in terms of energy and power, and therefore potentially to reduce the costs of energy storage. This has resulted in a considerable increase in the number of publications on redox-flow batteries. This was a motivation to present a comprehensive and critical overview of the features of this type of batteries, focusing mainly on the chemistry of electrolytes and introducing a thorough systematic classification to reveal their potential for future development.

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The Chemistry of Redox‐Flow Batteries

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“…Thesolvent molecules are pentacoordinated in the hexafluoro ligands.Depending on the polarity of the solvent, this coordination is stabilized by dipole-dipole interactions. [270][271][272][273][274] 3 ]i na cetonitrile with tetraethylammonium tetrafluoroborate (TEABF 4 )a sasupportingelectrolyteinahydrogen cell. Cyclovoltammetric measurements showed ad ependence of the potential differences of U V /U VI and U III /U IV on the solvent.…”

Section: Methodsmentioning

confidence: 99%

“…[273,274] Therein different solvent mixtures,a mongst other things,w ere investigated.Amixtureo fa cetonitrile,1 ,3dioxolane,a nd dimethyl sulfoxide (ADD)r esulted in ahigher solubilityo ft he [V(acac) 3 ], wherebyatheoreticalm aximum energy densityequivalenttothatinaVRFBcould be achieved. [273,274] Therein different solvent mixtures,a mongst other things,w ere investigated.Amixtureo fa cetonitrile,1 ,3dioxolane,a nd dimethyl sulfoxide (ADD)r esulted in ahigher solubilityo ft he [V(acac) 3 ], wherebyatheoreticalm aximum energy densityequivalenttothatinaVRFBcould be achieved.…”

Section: Methodsmentioning

confidence: 99%

ChemInform Abstract: The Chemistry of Redox‐Flow Batteries

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“…Inset plots in Fig 3 depict the Nyquist plots of Sunset yellow, Tartrazine, Ponceau 4R and Allura red on GCE, PC-1/ GCE, PC-2/GCE and PC-3/GCE. A small partially resolved semi-circle attributed to the electrolyte resistance appeared, indicating negligible electrolyte resistance [26,27]. Additionally, a big semi-circle was observed, of which the diameter corresponds to the charge transfer resistance (R ct ) of active species on electrode surface.…”

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confidence: 99%