Improved CO₂ Uptake and Supercapacitive Energy Storage Using Heteroatom‐Rich Porous Carbons Derived from Conjugated Microporous Polyaminoanthraquinone Networks

Abstract Functionalized porous carbons have received increased attention in both gas and supercapacitive energy storage. We report heteroatom‐rich porous carbons derived from two conjugated microporous polyaminoanthraquinone networks via a straightforward pyrolysis pathway, showing high contents of nitrogen (N, max. 5.2 wt%) and oxygen (O, max. 8.3 wt%), uniform micropore (∼0.6 nm) and large surface area (1165 m² g⁻¹). In comparison to the polymer precursors, the resulting porous carbons exhibit much improved CO₂ uptake capacity of 14.1 wt% at 1 bar maintaining an impressive reversible CO₂ uptake after 50 times use. More importantly, they can be applied for efficient supercapacitors with high energy storage capacity (200 F g⁻¹ at 0.5 A g⁻¹), fast charge/discharge rate (charge to 158 F g⁻¹ with only 25 s), and excellent stability (retain 98.5% capacity after 6000 cycles).