A polyimide based all-organic sodium ion battery

N,N′-diamino-3,4,9,10-perylenetetracarboxylic polyimide (PI) based materials show excellent electrochemical performance as cathodes for sodium-ion batteries and an all-organic sodium ion battery using this polyimide as the cathode and disodium terephthalate (NaTP) (pre-sodiated) as the anode is demonstrated.