Preparation of N-Doped Carbon Material Derived From Porous Organic Polymer As an Active Center to Growth Nickel Cobalt Phosphide for High-Performance Supercapacitors Publisher



Narimisa S¹ ; Mouradzadegun A^{1, 2} ; Zargar B¹ ; Ganjali MR^{3, 4} Show Affiliations
Source: Journal of Energy Storage Published:2024

Abstract

In this study, nitrogen-doped porous carbon materials derived from Azo-bridged calix[4]resorcinarene porous organic polymer were synthesized via pyrolysis at various temperatures. Notably, this work represents the first successful fabrication of nitrogen-doped carbon materials utilizing the Azo group (N=N) as a nitrogen source. This novel approach introduces diverse nitrogen configurations into the carbon matrix, crucial for enhancing material properties. Among the synthesized materials, nitrogen-doped carbon derived at 800 °C (N-C-800) exhibited exceptional characteristics including a high content of graphitic nitrogen, substantial specific surface area, hierarchical porous structure, and favorable conductivity, rendering it suitable for supercapacitor applications. N-C-800 demonstrated a remarkable specific capacity of 340 F g−1. Furthermore, the presence of pyridinic‑nitrogen functionalities in N-C-800 facilitated the anchoring of nickel cobalt phosphide nanowires, fostering a strong interaction between nitrogen and the metal. The resulting composite, Ni1Co2P@N-C-800, served as a positive electrode and showcased superior specific capacity of 1275 F g−1 with an impressive capacitance retention of 87 % over 1000 cycles at 1 A g−1. Additionally, an asymmetric supercapacitor configuration, Ni1Co2P@N-C-800//N-C-800, utilizing both N-C-800 and Ni1Co2P@N-C-800 electrodes, was simulated, delivering an energy density of 50.44 Wh kg−1 at a power density of 799 W kg−1. This work underscores the potential of facile synthesis routes for generating novel electrode materials with enhanced electrochemical efficiency, offering promising avenues for advanced energy storage applications. © 2024 Elsevier Ltd