Nitrogen-enriched micro-mesoporous carbon derived from polymers organic frameworks for high-performance capacitive deionization

Nitrogenization is an effective method for improving the capacitive deionization (CDI) per-formance of porous carbon materials.In particular,polymer organic frameworks with het-eroatom doping,containing an ordered pore structure and excellent electrochemical sta-bility,are ideal precursors for carbon materials for high-performance CDI.In this study,a nitrogen-enriched micro-mesoporous carbon (NMC) electrode was fabricated by carboniz-ing a Schiff base network-1 at 500,600,and 700 ℃.Scanning electron microscopy,Fourier transform infrared spectroscopy,X-ray diffraction,N2 adsorption-desorption,the contact angle of water,cyclic voltammetry,and electrochemical impedance spectroscopy were used to characterize the morphological structure,wettability,Brunauer-Emmett-Teller surface areas,and electrochemical performance of the NMCs.The results showed that the NMC carbonized at 600℃ achieved the best specific capacitance (152.33 F/g),as well as a high electrosorption capacity (25.53 mg/g) because of its chemical composition (15.57％ N) and surface area (312 m2/g).These findings prove that NMC is viable as an electrode material for desalination by high-performance CDI applications.