A porous organic polymer for symmetric sodium dual-ion batteries through an adsorption-intercalation-insertion mechanism

A porous organic polymer (POP) has been developed for dual-ion storage in all organic symmetric rechargeable batteries. The triphenylamine-pyrene-based POP could host sodium and hexafluorophosphate ions acting as the anode and the cathode, respectively, through the adsorption-intercalation and insertion mechanism. The current study highlights the concept of widening the potential window of a dual ion battery by judicious selection of the constituent moieties. A symmetric sodium dual-ion battery storing Na+ and PF6- ions simultaneously through an adsorption-intercalation-insertion mechanism has been developed employing a pyrene-triphenylamine-based porous organic polymer.