N‐Doped Porous Carbon Derived from Solvent‐Free Synthesis of Cross‐Linked Triazine Polymers for Simultaneously Achieving CO<sub>2</sub> Capture and Supercapacitors
Yuan Wang, Jianfei Xiao, Hanzhi Wang, Tian C. Zhang, Shaojun Yuan
Abstract
Abstract It is highly desirable to design advanced heteroatomic doped porous carbon for wide application. Herein, N‐doped porous carbon (NPC) was developed via the fabrication of high nitrogen cross‐linked triazine polymers followed by pyrolysis and activation with controllable porous structure. The as‐synthesized NPC at the pyrolysis temperature of 700 °C possessed rich nitrogen content (up to 11.51 %) and high specific surface area (1353 m 2 g −1 ), which led to a high CO 2 adsorption capability at 5.67 mmol g −1 at 298.15 K and 5 bar pressure and excellent stability. When the activation temperature was at 600 °C, such NPC exhibited a superior electrochemical performance as anode for supercapacitors with a specific capacitance of 158.8 and 113 F g −1 in 6 M KOH at a current density of 1 and 10 A g −1 , respectively. Notably, it delivered an excellent stability with capacity retention of 97.4 % at 20 A g −1 after 6000 cycles.