Different pretreatment methods combined with subsequent activation to convert waste eucalyptus bark into porous carbon electrode materials for supercapacitors

Abstract

Exploring the effects of different pretreatment methods on the properties of materials is of great significance for the effective utilization of waste biomass to produce high value-added porous carbon. Herein,...

Monolithic porous carbon membrane-based hybrid electrodes with ultrahigh mass loading carbon-encapsulated Co nanoparticles for high-performance supercapacitors

“…The interconnected layered porous structure of the Co@CPE electrodes would be expected to facilitate efficient charge and ion transport. 42,43 Notably, from the high-magnification SEM image of Fig. 1f, a large amount of Co nanoparticles can be observed to be firmly embedded within the carbon membrane matrix.…”

Exploring the Micropore Functional Mechanism of N2O Adsorption by the Eucalyptus Bark-based Porous Carbon

“…A larger ratio indicates a greater degree of disorder and less graphitization . The constituents of eucalyptus bark are hemicellulose (32.72%), cellulose (46.81%), and lignin (19.69%) . During the pyrolysis process, the weight loss of hemicellulose primarily happened at 220–315 °C, and volatile products such as acetic acid, carbon oxides, and aromatic compounds generated by a series of reactions, such as side-chain fragmentation reaction and xylopyranose chain depolymerization reaction.…”

“…During the pyrolysis process, the weight loss of hemicellulose primarily happened at 220–315 °C, and volatile products such as acetic acid, carbon oxides, and aromatic compounds generated by a series of reactions, such as side-chain fragmentation reaction and xylopyranose chain depolymerization reaction. The weight loss of cellulose mainly occurred at 315–400 °C, and the glycosidic bond in amorphous cellulose was disrupted, forming nanocellulose crystals, whose aromatization and multilayer stacking constituted the crystalline region of porous carbon; lignin decomposed in the range of 160–800 °C, and its structure was very difficult to rearrange, which was melted to form the amorphous region of porous carbon. − According to the I D / I G values of EPC0-600, EPC1-600, EPC2-600, and EPC3-600, it can be deduced that the addition of KOH could significantly intensify the disorder of porous carbon materials. After precarbonization at 500 °C, a significant portion of hemicellulose and cellulose had been reacted.…”

“…22 The constituents of eucalyptus bark are hemicellulose (32.72%), cellulose (46.81%), and lignin (19.69%). 33 During the pyrolysis process, the weight loss of hemicellulose primarily happened at 220− 315 °C, and volatile products such as acetic acid, carbon oxides, and aromatic compounds generated by a series of reactions, such as side-chain fragmentation reaction and xylopyranose chain depolymerization reaction. The weight loss of cellulose mainly occurred at 315−400 °C, and the glycosidic bond in amorphous cellulose was disrupted, forming nanocellulose crystals, whose aromatization and multilayer stacking constituted the crystalline region of porous carbon; lignin decomposed in the range of 160−800 °C, and its structure was very difficult to rearrange, which was melted to form the amorphous region of porous carbon.…”