A flow battery is a rechargeable fuel cell in which an electrolyte containing one or more dissolved electroactive elements flows through an electrochemical cell that reversibly converts chemical energy to electrical energy. Electroactive elements are "elements in solution that can take part in an electrode reaction or. A flow battery, or redox flow battery (after ), is a type of where is provided by two chemical components in liquids that are pumped through the system on. Redox flow batteries, and to a lesser extent hybrid flow batteries, have the advantages of: • Independent scaling of energy (tanks) and power (stack), which allows for a cost/weight/etc. optimization for each application The hybrid flow battery (HFB) uses one or more electroactive components deposited as a solid layer. The major disadvantage is that this reduces decoupled energy and power. The cell contains one battery electrode and one fuel cell electrode. This type is limited in energy. Other flow-type batteries include the, the, and the. MembranelessA membraneless battery relies on in which two liquids are pumped through a channel,. The (Zn-Br2) was the original flow battery. John Doyle file patent on September 29, 1879. Zn-Br2 batteries have relatively high specific energy, and were demonstrated in electric cars in the 1970s. Walther Kangro, an. The cell uses redox-active species in fluid (liquid or gas) media. Redox flow batteries are rechargeable () cells. Because they employ rather than or they are more similar to Compared to inorganic redox flow batteries, such as vanadium and Zn-Br2 batteries. Organic redox flow batteries advantage is the tunable redox properties of its active components. As of 2021, organic RFB experienced low durability (i.e. calendar or cycle.