A thermodynamic model representing solid-liquid equilibria in the VOSO4-H2SO4-H2O system based on water activity and solubility measurements
Résumé
The all-Vanadium Redox Flow Batteries (VRFBs) represent promising candidates as largescale energy storage systems, thanks to their energy efficiency of about 80% in large installations, long cycling life and flexible design (Alotto, 2014). A VRFB consists of two reservoirs from which the electrolytes flow through a stack of electrochemical cells. The V (V) /V (IV) and V (III) /V (II) redox systems are the electroactive materials (at about 2 mol.L -1 ), while the supporting electrolyte is a mixture of water and 2-3 mol.L -1 sulfuric acid.
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