3D organic Na 4 C 6 O 6 /graphene architecture for fast sodium storage with ultralong cycle life.

Sodium-ion batteries (SIBs) have aroused increasing interest as one of the most promising replacements for lithium-ion batteries (LIBs). Here, a novel organic-inorganic 3D Na4 C6 O6 -graphene architecture was successfully fabricated from commercial Na2 C6 O6 and for the first time applied for sodium storage. Hence, the 3D Na4 C6 O6 -graphene architecture exhibits a high reversible capacity, good cyclic performance and high-rate capability for sodium storage.