REDOX-FLOW BATTERY FOR ENERGY STORAGE

The present invention refers to a redox-flow battery () comprising a positive compartment () comprising a positive electrode () and a catholyte, wherein said catholyte is an alkaline ferrocyanide solution; a catholyte reservoir container () connected in fluid communication with the positive compartment () through at least one conduct () and said container () comprising catholyte and a solid electroactive material (), wherein said solid electroactive material is confined within the container and is selected from the group consisting of a metal oxide, a metal hydroxide, a metal oxyhydroxide or a combination thereof; a negative compartment () comprising a negative electrode () and an anolyte, wherein said anolyte is an alkaline solution; an anolyte reservoir container () connected in fluid communication with the negative compartment () through at least one conduct () and said container () comprising anolyte; and a power/load source (). In addition, the present invention is directed to an energy storage system comprising at least one redox-flow battery () as defined above, to a method of storing electricity comprising providing a redox-flow battery () as defined above, a method of delivering electricity comprising providing a redox-flow battery () as defined above, to the use of the redox-flow battery () as defined above to store or deliver electricity and to the use of the redox-flow battery () as defined above in renewable energy and electromobility sectors.