Nonylphenol polybenzoxazines-derived nitrogen-rich porous carbon (NRPC)-supported g-C 3 N 4 /Fe 3 O 4 nanocomposite for efficient high-performance supercapacitor application

In this work, a straightforward and scalable method was used to generate nitrogen-rich porous carbon (NRPC), which was then incorporated with a graphitic carbon nitride and magnetite (g-C N /Fe O ) nanocomposite, fabricated with Fe O nanoparticles as an eco-friendly and economically viable component. The fabricated NRPC/g-C N /Fe O nanocomposite was applied as an electrode in supercapacitor applications. The synthesized NRPC/g-C N /Fe O nanocomposite, NRPC, g-C N , and Fe O were characterized by analytical and morphological analyses. The spherically shaped Fe O nanoparticles were analyzed by field-emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM). The specific surface area of NRPC/g-C N /Fe O was determined to be 479 m g . All the crosslinked composites showed exceptional electrochemical performance and exhibited a pseudo-capacitance behaviour. In comparison to the Fe O and g-C N /Fe O electrodes, the NRPC/g-C N /Fe O electrode showed a lower charge-transfer resistance and higher capacitance. The prepared NRPC/g-C N /Fe O electrode exhibited the highest specific capacitance of 385 F g at 1 A g compared to Fe O (112 F g ) and g-C N /Fe O (150 F g ). Furthermore, the cycling efficiency of NRPC/g-C N /Fe O remained at 94.3% even after 2000 cycles. The introduction of NRPC to g-C N /Fe O improved its suitability for application in high-performance supercapacitors.