168611 20260211123813.0 doi 10.1016/j.est.2026.120760 sideral 147994 ART-2026-147994 eng Ibáñez, Álvaro Universidad de Zaragoza Influence of the physical properties of electrolytes on the behavior of all-vanadium redox flow batteries 2026 Electrolyte flow rate has a large impact on the overall efficiency and energy storage capacity of all‑vanadium redox flow batteries. This work focuses on the detailed determination of density and viscosity of vanadium electrolytes as a function of temperature and state of charge, as well as their influence on the actual electrolyte flow rate. Negative and positive electrolytes present different density and viscosity values and they also evolve differently, the divergence being especially significant in the dynamic viscosity. Mathematical correlations of experimental data are provided, and the influence of these properties on both hydraulic and electrochemical performance of the device is also discussed. An ad hoc experimental facility was manufactured where a 200 W battery was tested to assess the relevance of the different hydraulic conditions on the pressure drop and efficiency. A notable decrease in the total duration of the 5 charge/discharge cycles when the circulating flow rates were progressively reduced was observed. The average efficiency of the battery varied from 73.9% to 67.5% when decreasing the flow rate levels. In addition, a low-cost computational model was developed to estimate the circulating flow rate of each electrolyte and to discriminate the contribution of the specific pressure loss from the different components of the facility for a given operating condition. Access copy available to the general public Unrestricted info:eu-repo/grantAgreement/ES/DGA/T06-23R info:eu-repo/grantAgreement/ES/DGA/T53-24 info:eu-repo/grantAgreement/ES/MICINN/PID2021-126001OB-C32 info:eu-repo/grantAgreement/ES/MICINN/PID2024-158394OB-C21 info:eu-repo/semantics/openAccess by-nc-nd https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Montiel, Manuel Tejero, Andrés Ortiz de Landazuri, Ignacio (orcid)0000-0002-3391-7291 Lozano, Antonio (orcid)0000-0003-4141-6072 Barroso, Jorge Universidad de Zaragoza (orcid)0000-0002-0063-1318 Barreras, Félix (orcid)0000-0002-5391-8021 5001 600 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Mecánica de Fluidos 152, Parte C (2026), 120760 [14 pp.] J. energy storage Journal of Energy Storage 2352-152X 13781530 http://zaguan.unizar.es/record/168611/files/texto_completo.pdf Versión publicada 2665247 http://zaguan.unizar.es/record/168611/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:168611 articulos driver 2026-02-11-10:28:15 ARTICLE