Development and fabrication of phosphorus-doped ordered mesoporous carbon for highly efficient energy storage of supercapacitor application

Abstract

In this work, chemical vapor deposition (CVD) using SBA-15 as the template at different temperatures ( 750 - 1000 °C) was used for the fabrication of phosphorus-doped ordered mesoporous carbons (POMCs) for high-performance supercapacitors. The structural formation of the template and POMCs was confirmed using various characterization techniques. Furthermore, the magnetic characteristics of the POMCs were explored using room-temperature field-dependent magnetization studies. Moreover, the supercapacitor performance of the POMCs was evaluated through electrochemical analyses, such as cyclic voltammetry (CV), galvanostatic charge–discharge (GCD), and electrochemical impedance spectroscopy (EIS) in a 1 M H2SO4 electrolyte medium. Among all POMCs, POMC 900 exhibited a high specific capacitance of 312 Fg−1 at a current density of 0.5 Ag−1 due to a higher Phosphorus content. Furthermore, the symmetric device fabricated using POMC 900 showed 90.8 % coulombic efficiency with 97.5 % capacitance retention after 5000 cycles at 2 Ag−1 of the current density as well. Thus, the CVD synthesis of POMC materials is a highly promising electrode material for cheap and high-performance supercapacitors.