Enhanced supercapacitor performance of hierarchical mesoporous sulfur-doped carbon particles from biomass waste for energy storage
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Tarih
2025
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Elsevier Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, sulfur doping was carried out on activated carbon derived from biomass waste chestnut shells using a simple process involving activation with sulfuric acid to enhance the specific capacitance of supercapacitors (AC/CS). With the carbon surface becoming more polarized by the sulfonation process, it is aimed to achieve high wettability, which is important for supercapacitors, and to effectively transfer the electrolyte to the pores of carbon materials. The resulting activated carbon particles were characterized by EDS, FTIR, SEM, Raman, XPS, nitrogen adsorption and XRD analyses. EIS, CV and GCD analyses were used for electrochemical measurements. At a current density of 2 A/g, there is an approximately 1.68-fold increase in the capacitance value for the sulfonated AC/CS@GCE compared to the AC/CS@GCE electrode. The sulfonated AC/CS@GCE electrode showed ideal cycling stability with a capacitance retention rate of ?84.7% after 10000 cycles. The Rct values of AC/CS@GCE and sulfonated AC/CS@GCE electrodes were ?15.2 ? and ?113 ?, respectively. The AC/CS@GCE//AC/CS@GCE device can store 4.98 Wh/kg of electrochemical energy with a power density of 161.5 W/kg at a current density of 2 A/g. At a higher current density of 10 A/g, it can store 2.22 Wh/kg of electrochemical energy with a power density of 799.2 W/kg. © 2024 Hydrogen Energy Publications LLC
Açıklama
Anahtar Kelimeler
Biomass waste, Heteroatom, Mesoporous carbon, Sulfonation process, Supercapacitor
Kaynak
International Journal of Hydrogen Energy
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
99
