| 초록 |
Vanadium redox flow batteries (VRFB) have received attention as a large-scale energy storage technology for intermittent renewable energy sources. VRFB are considered especially attractive, since the electrochemically active reactants are vanadium species in four different oxidation states in electrolyte solutions. The power, life cycle and performance of the VRFB depend on redox reactions between soluble ionic species in electrolytes. Therefore, research has been devoted to the development of VRFB electrolyte. Despite extensive studies of the electrochemistry and stability of vanadium ions in acidic solutions, there is still limited information available on understanding the relationship between chemical speciation of the solutions. In this work, we have studied stability, chemistry of electrolyte, and the electrochemical performance of VRFB. NMR, Raman spectroscopy and UV-vis spectrophotometry were carried out to understand the relationship between electrolytes. |
