Preparation of Nitrogen and Phosphorus Doped Porous Carbon from Watermelon Peel as Supercapacitor Electrode Material

Abstract

The use of green and sustainable biomass-derived compounds to obtain excellent electrochemical properties is important to address growing environmental and energy issues. In this paper, cheap and abundant watermelon peel was used as a raw material to successfully synthesize nitrogen-phosphorus double-doped bio-based porous carbon by a one-step carbonization method and explore it as a renewable carbon source for low-cost energy storage devices. The supercapacitor electrode exhibited a high specific capacity of 135.2 F/g at a current density of 1 A/g in a three-electrode system. A variety of characterization methods and electrochemical tests indicate that porous carbon prepared by this simple method has great potential as electrode materials for supercapacitors.

Phosphorus and Nitrogen Codoped Porous Carbon Nanosheets for Energy Storage and Gas Adsorption

“…The peaks centered at binding energies of 284.59, 285.53, 286.85, and 289.31 eV can be attributed to CC, C–P/CN, C–O, and O–CO, respectively, presented in Figure d Figure e presents the high-resolution spectrum of N 1s, deconvoluted into four peaks . The peaks centered at 398.3, 400, 400.5, and 402 eV correspond to pyridinic N, pyrrolic N, graphitic N, and N–O bond (oxidic N), respectively .…”

“…The high-resolution C 1s peak can be deconvoluted into four peaks. The peaks centered at binding energies of 284.59, 285.53, 286.85, and 289.31 eV can be attributed to CC, C–P/CN, C–O, and O–CO, respectively, presented in Figure d Figure e presents the high-resolution spectrum of N 1s, deconvoluted into four peaks .…”

“…Figure e presents the high-resolution spectrum of N 1s, deconvoluted into four peaks . The peaks centered at 398.3, 400, 400.5, and 402 eV correspond to pyridinic N, pyrrolic N, graphitic N, and N–O bond (oxidic N), respectively . The percentages of pyridinic N, graphitic N, pyrrolic N, and oxidic N were calculated to be 27.09, 48.05, 10.1, and 14.75, respectively.…”

High Porous Activated Carbon Electrode Derived from Watermelon Peel Biomass Exposed with DC Glow Discharge Plasma Applied for Super Capacitors

“…All of the electrodes were found to have a straight-line profile at lower frequencies, almost 45°t o the imaginary axis. 7,30,35 Figure 10 shows the plot and graph of the Nyquist plot and the polarization resistance and charge transfer resistance are been noted in the Table III.…”

“…Based on the results, porous activated carbon derived from biomass would be the ideal material for applications involving highperformance capacitors and supercapacitors, as well as low-cost energy storage devices, due to its remarkable performance. 30,35,36 Potential Applications and Environmental Benefits Activated carbon derived from watermelon peel exhibits excellent adsorption properties and finds diverse applications in various fields. It can effectively remove organic pollutants, heavy metals, dyes, and other contaminants from water and wastewater treatment processes.…”