IVEDS project aims at the design of safe and high volumetric energy electrochemical capacitors and the concomitant benchmarking of various asymmetric devices. Our final goal is to increase by 50% the volumetric energy density of nowadays symmetrical carbon ECs, while keeping the power density close to that of state of the art devices. Three key players in the field of supercapacitors (IMN, ICGM) and benchmarking of lithium-ion batteries (LRCS) are gathering together in this innovative project which will target a change of paradigm from carbons to oxides for large-scale applications of supercapacitors where volumetric energy density and safety are the moRS2Est important parameters. This consortium will take benefit from its belonging to the French Network on Energy Storage (RS2E).