TY - JOUR
T1 - Investigating the electro-kinetics and long-term solubility of vanadium electrolyte in the presence of inorganic additives
AU - Nguyen, Oanh Hoang
AU - Iyapazham Vaigunda Suba, Prathap
AU - Shoaib, Muhammad
AU - Thangadurai, Venkataraman
N1 - We acknowledge the support of the Natural Sciences and Engineering Research Council of Canada (NSERC), Idea to Innovation (I2I) grant. We would also like to thank Professor Steven Larter, Professor Benjamin Tutolo, and Dr. Arthi Gopalakrishnan (Department of Geoscience, University of Calgary) for the help in SEM and Raman analysis.
PY - 2023/11/20
Y1 - 2023/11/20
N2 - With the ever-growing energy storage demands for electrical grids, vanadium redox flow batteries (VRFB), a stellar candidate, need continuous cost, cyclability, and energy density improvement. The VRFB tend to lose vanadium from electrolyte solutions due to the precipitation of V2O5 during charging, resulting in a significant loss of energy density. We monitored the solubility and electrochemical characteristics of vanadium electrolyte solutions with V2O5 as the starting material in the presence of different additives, namely HCl and MSA (methanesulfonic acid), for over three months. On average, the ionic conductivity of solutions with additives was 50 mS higher than that of without additives. Additives also improved the electrochemical performance and lowered charge transfer resistance. UV/Vis and Raman spectroscopy were utilized, and a reaction mechanism responsible for improved conductivity and kinetics was proposed.
AB - With the ever-growing energy storage demands for electrical grids, vanadium redox flow batteries (VRFB), a stellar candidate, need continuous cost, cyclability, and energy density improvement. The VRFB tend to lose vanadium from electrolyte solutions due to the precipitation of V2O5 during charging, resulting in a significant loss of energy density. We monitored the solubility and electrochemical characteristics of vanadium electrolyte solutions with V2O5 as the starting material in the presence of different additives, namely HCl and MSA (methanesulfonic acid), for over three months. On average, the ionic conductivity of solutions with additives was 50 mS higher than that of without additives. Additives also improved the electrochemical performance and lowered charge transfer resistance. UV/Vis and Raman spectroscopy were utilized, and a reaction mechanism responsible for improved conductivity and kinetics was proposed.
U2 - 10.1149/1945-7111/ad0a75
DO - 10.1149/1945-7111/ad0a75
M3 - Article
AN - SCOPUS:85177990610
SN - 0013-4651
VL - 170
JO - Journal of The Electrochemical Society
JF - Journal of The Electrochemical Society
IS - 11
M1 - 110523
ER -
