Summary of the project: The project’s objective is to advance fundamental research by elucidating the intrinsic relationship between the properties of graphene-based material and their electrochemical storage performances in supercapacitor cells, thanks to the combination of basic and advanced characterization techniques, particularly adapted to the investigation of the evolutions of the surface chemistry and multi-scale structure upon cycling. These findings will enable to provide a multi-scale understanding of storage mechanism and will help to further design materials with enhanced storage properties.