▎ 摘　　要

NOVELTY - Manufacturing a structure (30) comprising at least one oxidized graphene sheet doped with nitrogen and comprising phosphorus and oxygen-based groups (31), for forming an interface between an electrode and an electrolyte of a supercapacitor, comprises: preparing an aqueous suspension (1) of a graphene oxide (10) in water; adding a nitrogen-based compound (2) in the aqueous suspension; heating the aqueous suspension; filtering the aqueous suspension in order to obtain a solid compound comprising oxidized nitrogen-doped graphene; preparing an acid suspension comprising the solid compound and a phosphoric acid; heat the acid suspension; and filtering the acid suspension in order to obtain the structure. USE - The method is useful for manufacturing a structure for forming an interface between an electrode and an electrolyte of a supercapacitor (claimed). ADVANTAGE - The method: provides supercapacitor which offers a high surface and allows to reach a capacity of greater value than the values obtained by conventional methods; utilizes oxygen atoms in sheet to avoid agglomeration of phosphorus-based groups on the edges of the sheet; and utilizes graphene which is a good electric driver and is stable chemically in the electrolytes of the supercapacitor. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for the structure obtained by the above method. DESCRIPTION OF DRAWING(S) - The figure shows a flow chart for manufacturing the structure. Aqueous suspension (1) Nitrogen-based compound (2) Graphene oxide (10) Structure (30) Phosphorus and oxygen-based groups (31)