![]() ![]() These attributes, the VRB suffers from loss of energy capacity All rights reserved.ĭensity depends on the concentration of the electrolytes. Power density depends on the size of the cells whereas the energyĠ378-7753/© 2014 Elsevier B.V. ItĪlso offers the separation of power and energy densities in that the Installation location, reduction in cost and fast response time. As an electrical energy storage (EES) device the VRB offers long cycle life, flexibilities in design and The concentrated vanadium electrolyte solutions, which are separated by an IEM that allows diffusion of protons but prevent the twoĮlectrolytes from mixing. The VRB operates on redoxĬouples of V(II)/V(III) and V(IV)/V(V) at the negative and positiveĮlectrodes respectively, with each cell consisting of an anode, aĬathode, and an ion exchange membrane (IEM). The vanadium redox flow battery (VRB) is a candidate for largescale electrical energy storage. The two solution are discussed in terms of the 1H NMR, ionic conductivity and viscosity data. The differences between the transport capabilities of Additionally, data suggest that with greater metal ion concentration ionĪssociation is more prevalent for the vanadyl ion. Activation energies calculated from ionic conductivityĪnd solution viscosity show greater energy being needed for translational ion dynamics with increasingĬoncentration for both solutions. Solution viscosity, especially in the case of VOSO4. Results show ion and proton transport processes that are mediated strongly by increasing Concentration ranges of 0.05e2 M and 0.05e0.2 M were investigated for VOSO4 and NH4VO3 respectively inĢ M H2SO4. Metavanadate (NH4VO3) and vanadyl sulfate (VOSO4) over the temperature range of 20e100 C. Variable temperature ionic conductivity, viscosity and 1H NMR spin-lattice relaxation times, linewidthsĪnd chemical shifts measurements were determined for various concentrations of aqueous ammonium Greater metal ion concentration ion association more prevalent for vanadyl ion. Activation energies calculated from ionic conductivity and solution viscosity. Ion and proton transport processes mediated strongly by viscosity. Physics Department, Brooklyn College, The City University of New York, 2900 Bedford Ave, Brooklyn, NY 11210, USA Sophia Suarez*, Meriam Sahin, Yara Adam, Lucy Moussignac, David Cuffari, Solutions of VOSO4 and NH4VO3 in 2 M H2SO4 Journal homepage: A variable temperature study of the transport properties of aqueous Journal of Power Sources 276 (2015) 153e161Ĭontents lists available at ScienceDirect ![]()
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