Although the cost of emissions-free electricity from photovoltaics and wind power has dropped below the cost of fossil fuel-generated electricity, the intermittency of these renewable resources presents an increasingly difficult problem as their contribution to the generation mix grows. One potential solution is storing energy from these sources when available and then utilizing it when necessary. In addition to utilizing renewable sources, stationary storage also plays a significant role in balancing the power supply and demand for grid electricity. Various energy storage systems have been developed so far, amongst which flow batteries are particularly suitable for grid storage needs. The unique architecture of flow batteries makes it possible to decouple power and energy scaling, offering system flexibility to fit a wide range of specifications for power and discharge duration, i.e. energy/power ratio. Aqueous flow batteries, in particular, utilize water as the solvent and have no flammability concern. Operating in water also brings a significant cost advantage. Aqueous-soluble organic energy-storing molecules, benefiting from structural diversity and the earth-abundance of their atomic components, may permit scalable, safe, cost-effective long duration energy storage in aqueous redox flow batteries. strategies for reducing and reversing this decomposition have been demonstrated. The first strategy involves restricting the state of charge (SOC) of the negolyte. The second approach is to electrochemically oxidize the decomposition product, 2,6-dihydroxyanthrone (DHA), back into DHAQ. The latter approach involves lowering the cell voltage during the discharge step to values where the negolyte, specifically the decomposition products, experiences a more positive potential than in normal cycling. As a result, the side products are oxidized back to DHAQ.