Nitrogen-Enriched Nanoporous Polytriazine for High-Performance Supercapacitor Application

Abstract

Polytriazine with high nitrogen content (c.a. 50.5 wt %) has been synthesized by an ultrafast microwave-assisted method using melamine and cyanuric chloride. The nitrogen-enriched nanoporous polytriazine (NENP-1) has exhibited high specific surface area (maximum SABET of 838 m2 g–1) and narrow pore size distribution. The NENP-1 has been employed as electrode material for supercapacitor application. A maximum specific capacitance (Csp) of 1256 F g–1 @1 mV s–1 and 656 F g–1 @1 A g–1 are estimated from the cyclic voltammetry (CV) and galvanostatic charge/discharge (GCD) measurements, respectively, in a three-electrodes configuration. This Csp value is considered as very high for a nonmetallic system (organic polymer). Superior capacitance retention of 87.4% of its initial Csp was observed after 5000 cycles at a current density of 5 A g–1 and demonstrates its potential as an efficient electrode material for practical applications. To test this claim, an asymmetric supercapacitor device (ASCD) was fabricated. ...