| 초록 |
Redox flow batteries (RFBs) have been considered as one of the most promising candidate for the large scale energy storage systems (ESSs) because of their outstanding features such as long life cycle and design flexibility. Although the most intensively investigated and close to be commercialized RFB is aqueous vanadium RFB (VRFB), low energy density owing to limited cell potential of aqueous VRFB drove attention to non-aqueous VRFB. In particular, vanadium acetylacetonate (V(acac)3) has been employed as an active species for non-aqueous VRFB for its relatively wide potential range (2.2 V). However, V(acac)3 based VRFB still has been suffered by the vulnerability for oxidation under air. In this work, we added several ionic liquids as an additive and investigated the stability of V(acac)3 in the presence of ionic liquid under air and N2 (g), respectively. |
