'It yet remains to see...' - Hybrid electrochemical energy storage system of high power and improved cycle life

This project focuses on the electric energy storage and offers research on novel type of hybrid electrochemical capacitor (HEC) thatstores the energy quickly (due to high power), efficiently (due to reversible interactions inside) and demonstrates the satisfactoryperformance over thousands of charging/discharging cycles.Innovative concept of redox-active electrolyte as a component that allows for full insertion of the negative electrode will beresearched. A comprehensive study, including several operando techniques will be provided, with elaboration on the mechanismsthat govern the performance fade. Finally, the device of high energy density (~50 Wh/kg) and power (over 1 kW/kg), retained over atleast 1 000 of cycles is aimed to be delivered.