Indexed by:期刊论文

Date of Publication:2019-04-01

Journal:MICROPOROUS AND MESOPOROUS MATERIALS

Included Journals:EI、SCIE

Volume:278

Page Number:195-205

ISSN No.:1387-1811

Key Words:Furfural residue; Porous carbon; Sequencing integration system; Molten salt; Energy storage

Abstract:The main objective of this study is to develop a new sequencing integration process combining carbonization and activation procedure. Simultaneously, high-surface area honeycomb-like porous carbons are produced from furfural residues through a molten salt method at a low impregnation ratio for high performance supercapacitors. The experimental results show that the porous carbon has a large surface area over 2494 m(2) g(-1) and a total pore volume of 1.51 cm(3) g(-1) at a low impregnation ratio of 0.8. Additionally, only 120 s is sufficient for soaking char with molten salt. The porous carbon-based electrode exhibits higher capacitance of 210.2 F g(-1) with 96.3% capacity retention after 10, 000 cycles at 5 A g(-1) in 6 M KOH electrolyte. More importantly, the supercapacitor based on FS-60-120-800-1 electrode exhibits a high energy density of 52.6 Wh kg(-1) at a power density of 251.0 W kg(-1). Compared with conventional chemical activation method, porous carbons with high surface area and excellent pore structure are produced at a shorter time, and less activation dosage by this new molten salt-potassium hydroxide activation method. The remarkable honeycomb-like porous carbon can be used as a promising electrode material for high performance supercapacitor in energy storage applications.