Porous Activated Carbons Derived from Pleurotus eryngii for Supercapacitor Applications

Abstract

Varieties of natural biomass have been utilized to prepare porous carbon materials for supercapacitor applications. In this work, porous activated carbons derived from Pleurotus eryngii were prepared by carbonization and KOH activation. The activated carbons presented a large specific surface area of 3255 m 2 ·g −1 with high porosity. The as-prepared electrode exhibited a maximal specific capacitance of 236 F·g −1 measured in a three-electrode cell system. Furthermore, the assembled symmetric supercapacitor showed a specific capacitance of 195 F·g −1 at 0.2 A·g −1 and a superior specific capacitance retention of about 93% after 15000 cycles. The desirable capacitive behavior suggests that Pleurotus eryngii is an attractive biomass source of carbon materials for the potential supercapacitor applications.

Revalorization of Pleurotus djamor Fungus Culture: Fungus-Derived Carbons for Supercapacitor Application

“…The distance d 002 was greater than that of graphite (~0.335 nm) in all cases, due to the defects caused by activation with KOH. The amorphous carbon we obtained was consistent with the fungus-derived carbon of Pleurotus eryngii [40], Dictyophora sp. [4], Agaricus sp.…”

Multilayer carbon materials prepared from Zanthoxylum schinifolium husk for high-performance supercapacitors

“…High-efficiency energy conversion and storage technologies are the major challenges and important opportunities for human beings at present. [1][2][3] Among the advanced energy storage techniques, a supercapacitor with high power density, fast chargedischarge rate, and long cycle life has good application prospects in the portable energy storage eld. 4,5 According to different energy storage mechanisms, a supercapacitor can be divided into two types.…”

Nitrogen-Doped Hierarchical Porous Activated Carbon Derived from Paddy for High-Performance Supercapacitors

“…According to Figure 5 a, the isotherms of PR and PRN1 are close to the horizontal axis, implying there are few pores in these two samples, which is in accordance with the results of SEM ( Figure 3 a,c). After KHCO 3 activation, PRK3 possesses typical type I adsorption–desorption isotherms with a steep increase at very low relative pressure, indicating the existence of abundant micropores [ 11 , 32 ]. The isotherm of PRK3N1 has a higher sharp rise, followed by an obvious increase and hysteresis loop at the high relative pressures, suggesting that PRK3N1 possesses more micropores than PRK3 and also a large amount of mesopores [ 33 , 34 ].…”

“…Hierarchical porous carbon materials prepared by template-assisted methods have optimized carbon structures, because the macrospores and mesopores provide channels to facilitate ion transport, while micropores are more favored to form the electrical double layers [ 7 , 8 ]. Chemical activation agents, such as H 3 PO 4 , KOH or ZnCl 2 , are also employed to prepare porous carbons with ordered pore structures [ 9 , 10 , 11 , 12 ]. Despite their excellent capacitance performance, they are usually confronted with complex processes, like dangerous chemicals, harmful by-products, and expensive cost.…”