Perpustakaan Digital ITB

To achieve sustainable development, biomassmaterials are alternative options for mitigating the problemsassociated with energy and the environment. Recently, solubleanthraquinones in aqueous redoxflow batteries have attractedextensive attention. Inspired by a natural anthraquinone dyenamed alizarin, here we report an affordable, sustainable, andefficient redoxflow battery electrolyte using a derivative ofalizarin, namely, alizarin-3-methyliminodiacetic acid, whichhas been easily synthesized from alizarin on an industrial scale.The battery exhibits an open-circuit voltage of 1.38 V, and themaximum power density exceeds 0.49 W cm?2. Also, thebattery has a stable cycling performance of 350 cycles with a high Coulombic efficiency of 99.6%, energy efficiency of 84.2%,and capacity retention of 99.98% per cycle, 99.97% per hour, and 99.19% per day at 0.1 A cm?2. Moreover, the battery system isenvironmentally friendly and provides novel ideas for biomass-derived green energy-storage systems.