Biomass-derived nitrogen and sulfur co-doped sheet-like porous carbon for high-performance supercapacitors

Abstract

Nitrogen and sulfur co-doped porous carbon (NSCDPC) was prepared by a one-step method using purple-leaf plum kernel shell, potassium benzoate, and N,N’-diphenylthiourea (DPTU) as carbon precursor, activator and nitrogen and...

Effects of Potassium-Based Activating Agents on the Biochar Derived from Coconut Tree Husk for Enhancing the Surface Area and Supercapacitor Performance

“…The two peaks around 24° and 43° correspond to all sample (002) and (100) planes, implying that all samples are in amorphous structures. The broad diffraction peak at low 2θ corresponds to the disturbed structure of carbon, and the peak at high 2θ corresponds to the limited graphitization degree of the carbon sample . All activated carbon diffraction peaks are wide and weakly intense, suggesting the amorphous and small crystalline nature of the samples …”

“…The broad diffraction peak at low 2θ corresponds to the disturbed structure of carbon, and the peak at high 2θ corresponds to the limited graphitization degree of the carbon sample. 30 All activated carbon diffraction peaks are wide and weakly intense, suggesting the amorphous and small crystalline nature of the samples. 31 Raman Analysis.…”

Facile Synthesis of Functionalized Porous Carbon by Direct Pyrolysis of Anacardium occidentale Nut-Skin Waste and Its Utilization towards Supercapacitors

“…A capacitance retention of ~46% was observed, suggesting the good electrochemical performance (excellent rate capability) of the as-prepared AO-PC material. The limited fallout of capacitance might be due to the ingestion of the electrolyte and the irreversible reaction of the as-prepared AO-PC material-based electrode during the GCD process [ 59 ]. The greater quantity of charge storage in the as-prepared AO-PC material is due to the incorporation of sulfur and nitrogen atoms in the carbon framework [ 60 ].…”

3D hierarchical tri-doped porous carbon derived from calcium lignosulfonate for high-performance zinc ion hybrid capacitors

“…It indicates its low graphitization ratio and amorphous properties. [31][32][33] At the carbonization temperature of 900 1C, the alumina peak in the sample is observed as a result of the interaction between the sample and the corundum boat after sintering. To investigate the degree of graphitization of the LHPCs, Raman spectroscopy was performed, and I D /I G was utilized to examine the internal structure of the amorphous carbon materials.…”

“…As shown in Fig. S3c (ESI †), the high-resolution XPS spectrum of S 2p of LHPC-700 has three peaks corresponding to C-S (163.8 eV), S-S (165.0 eV), SQO (168.6 eV), 33 respectively. Among them, the SQO structure component is the highest (48.29%) in S 2p due to the sulfonic acid groups of CLS, which allows sulfur atoms to remain in the carbon structure after carbonization.…”