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论文类型：期刊论文

发表时间：2019-04-01

发表刊物：MICROPOROUS AND MESOPOROUS MATERIALS

收录刊物：EI、SCIE

卷号：278

页面范围：195-205

ISSN号：1387-1811

关键字：Furfural residue; Porous carbon; Sequencing integration system; Molten salt; Energy storage

摘要：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.