{"id":1248,"date":"2026-03-20T10:44:18","date_gmt":"2026-03-20T10:44:18","guid":{"rendered":"https:\/\/citations.tools.bio-logic.fr\/?p=1248"},"modified":"2026-03-20T10:44:18","modified_gmt":"2026-03-20T10:44:18","slug":"resolving-charge-transfer-and-mass-transfer-processes-of-vo2-vo2redox-species-across-the-electrode-electrolyte-interface-using-electrochemical-impedance-spectroscopy-for-vanadium-redox-flow-battery","status":"publish","type":"post","link":"https:\/\/citations.tools.bio-logic.fr\/?p=1248","title":{"rendered":"Resolving charge-transfer and mass-transfer processes of VO<sup>2+<\/sup>\/VO<sub>2<\/sub><sup>+<\/sup>redox species across the electrode\/electrolyte interface using electrochemical impedance spectroscopy for vanadium redox flow battery"},"content":{"rendered":"<h4>DOI:<\/h4>\n<p><a href=\"https:\/\/doi.org\/10.1039\/d0ra05224h\" target=\"_blank\" rel=\"noopener\">10.1039\/d0ra05224h<\/a><\/p>\n<h4>Authors:<\/h4>\n<p>Pradipkumar Leuaa, Divya Priyadarshani, Debittree Choudhury, Rajan Maurya, Manoj Neergat<\/p>\n<h4>Abstract:<\/h4>\n<p>Electrochemical impedance spectroscopy is used to investigate the charge-transfer and mass-transfer processes of VO<sup>2+<\/sup>\/VO<sub>2<\/sub> <sup>+<\/sup> (V<sup>4+<\/sup>\/V<sup>5+<\/sup>) redox species across the carbon-modified glassy carbon disk electrode\/electrolyte interface. The features of the EIS patterns depend on the potential, concentrations of the redox species and mass-transport conditions at the electrode\/electrolyte interface. With the starting electrolyte containing either only V<sup>4+<\/sup> or V<sup>5+<\/sup> redox species, EIS shows a straight line capacitor feature, as no oxidation or reduction reaction take place at the measured open circuit potential (OCP). With the electrolyte containing equimolar concentration of V<sup>4+<\/sup> and V<sup>5+<\/sup>, EIS pattern has both charge-transfer and mass-transfer features at the equilibrium potential. The features of the charge-transfer process are observed to be influenced by the mass-transfer process. Optimum concentrations of the V<sup>4+<\/sup>\/V<sup>5+<\/sup> redox species and supporting H<sub>2<\/sub>SO<sub>4<\/sub> electrolyte are required to resolve the EIS features corresponding to the underlying physical processes. The semi-infinite linear diffusion characteristics of the V<sup>4+<\/sup>\/V<sup>5+<\/sup> redox species observed with a static condition of the electrode converges to that of a finite diffusion under hydrodynamic condition.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>DOI: 10.1039\/d0ra05224h Authors: Pradipkumar Leuaa, Divya Priyadarshani, Debittree Choudhury, Rajan Maurya, Manoj Neergat Abstract: Electrochemical impedance spectroscopy is used to investigate the charge-transfer and mass-transfer processes of VO2+\/VO2 + (V4+\/V5+) redox species across the carbon-modified glassy carbon disk electrode\/electrolyte interface. The features of the EIS patterns depend on the potential, concentrations of the redox species [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[34,36,40],"class_list":["post-1248","post","type-post","status-publish","format-standard","hentry","category-sp-300-potentiostat","tag-battery","tag-eis","tag-redox-flow-battery"],"_links":{"self":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1248","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1248"}],"version-history":[{"count":0,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=\/wp\/v2\/posts\/1248\/revisions"}],"wp:attachment":[{"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/citations.tools.bio-logic.fr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}