KHCO3 chemical-activated hydrothermal porous carbon derived from jackfruit inner skin for supercapacitor applications

• Published in: Journal of molecular structure 2024-12, Vol.1318, p.139380, Article 139380
• Main Authors: Wang, Liujie, Li, Wenbo, Li, Pengfa, Zhang, Laiping, Li, Li
• Format: Article
• Language: English
• Subjects: Hydrothermal carbonization; Mild activation; Porous carbon; Waste biomass
• ISSN: 0022-2860
• DOI: 10.1016/j.molstruc.2024.139380

•Heteroatom-doped carbon ball/nanosheet structure porous carbon is prepared via hydrothermal carbonization method.•The AC-Fe-10 % delivers the capacitance of 273.2 F/g at 1 A/g.•The heteroatom-doped carbon ball/nanosheet structure porous carbon facilitated ion/electrolyte diffusion. The reuse of waste biomass resources had become a hot spot in the sustainable development of human society. Due to the complexity of biomass composition and microstructure, the quality reproducibility of biomass porous carbon was poor. Therefore, it was of great significance to develop a reliable method for preparing porous carbon from biomass. In this paper, a combination of hydrothermal carbonization treatment and mild activation of KHCO3 was used to prepare iron-modified porous carbon with carbon spheres/nanoplates structure, which promoted ion/electrolyte diffusion and increased the accessibility between surface area and electrolyte ions. Therefore, the active porous carbon from the Jackfruit inner skin has good specific capacitance (273.2 F/g at 1 A/g) and good cycle stability, and the capacitance loss is only 6.6 % after 10,000 charge discharge cycles. The above results showed that hydrothermal treatment and mild activation methods provided an effective way to transform waste biomass into high-performance electrode material.