A tubular-like porous carbon derived from waste American poplar fruit as advanced electrode material for high-performance supercapacitor

Recently, the naturally available biomass wastes are received considerable attention as an appropriate carbon precursor to making low-price, sustainable, and environmental friendly porous carbon for supercapacitors. In this study, we have derived a tubular-like porous carbon (TPC) from natural waste American poplar fruit as a carbon precursor via simple carbonization and KOH activation processes. The derived TPC exhibits an impressive tubular-like framework with extremely arranged porous structures and an enhanced surface area of 942 m(2) g(-1). Besides, the TPC exhibits superior specific capacitance (SC) (423 F g(-1) at 1 A g(-1)) and rate ability (remained 217 F g(-1) of SC still at 200 A g(-1)). It also has very-extensive cyclic life with only loss 3% of SC after 200,000 cycles still at 200 A g(-1). The as-fabricated symmetrical cell under 6 M KOH offered a noteworthy SC of 58.71 F g(-1) at 1 A g(-1), superb specific energy of 7.99 Wh kg(-1) at 372 W kg(-1) as well as outstanding cyclic durability with preserved 80.2% of SC after 10,000 cycles at 10 A g(-1). Meanwhile, the symmetrical cell under 1 M Et4NBF4/AN electrolyte expressed an increased SC of 31.68 F g(-1) at 1 A g(-1), high specific energy 13.75 Wh kg(-1) at 624 W kg(-1) as well as excellent cyclic durability with preserved 60.5% of SC after 10,000 cycles at 10 A g(-1). Thus, the present work recommends that waste American poplar fruit is a sustainable carbon source for production of hierarchical porous carbon for energy storage device applications.