A high energy storage supercapacitor based on nanoporous activated carbon electrode made from Argan shells with excellent ion transport in aqueous and non-aqueous electrolytes

Boujibar, Ouassim; Ghosh, Arunabh; Achak, Ouafae; Chafik, Tarik; Ghamouss, Fouad

doi:10.1016/j.est.2019.100958

Cited by 55 publications

(18 citation statements)

References 55 publications

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“…However, TD-ZnCl2 has the lowest 2θ angles for the reflection plane [002] of 22.571° and the smallest for [100] of 43.848° compared to other samples. This is because the ZnCl2 impregnation produces a relatively more random combination of micropores and mesoporous [36] and it corresponds to the data shown in the previous density reduction. In addition, a small number of sharp peaks were found at a 2θ angle of 37.47° which confirmed the presence of crystalline compounds from CaCO3 [14].…”

Section: Microstructure Featuressupporting

confidence: 79%

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Taer

Apriwandi

Hasanah

et al. 2021

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In this study, the activated carbon with enriched nanofiber obtained from free-binder materials. It was conducted tofu dregs carbon nanofiber as electrode material for supercapacitor without the addition of pVdF/PTFE. The chemical impregnation of NaOH, ZnCl2 and H3PO4 at high-temperature pyrolysis in an N2-CO2 environment converted the tofu dregs into carbon coin. Subsequently, the physical properties including, microcrystalline, morphology, element analysis, and electrochemical properties of specific capacitance were investigated. The morphological structure of activated carbon showed high nanofiber density and was decorated by sponge-like pores. In addition, the nanofiber contains oxygen content of 12.70% which can act as self-doping due to the pseudo-capacitance properties. Furthermore, the two-electrode system obtained a specific capacitance of 163 F g-1 in 1 M H2SO4 electrolyte. The results showed that tofu dregs-based activated carbon coins are sustainable and efficient to obtain high-dense nanofiber structure as electrode materials for energy storage applications.

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Section: Microstructure Featuressupporting

confidence: 79%

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Taer

Apriwandi

Hasanah

et al. 2021

CST

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“…Biomass is frequently used for the production of activated carbon (AC), but among many natural organic materials only some of them can be considered as useful precursors [ 2 , 7 , 8 , 9 ]. Naturally occurring materials such as rice husk [ 10 ], wood [ 11 ], cotton [ 12 ], bamboo [ 13 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Effect of Alkaline-Basic Electrolytes on the Capacitance Performance of Biomass-Derived Carbonaceous Materials

et al. 2020

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The present work explores in detail the effect of alkaline-basic electrolytes on the capacitance performance of biomass-derived carbonaceous materials used as electrodes in symmetric supercapacitors. The proof-of-concept is demonstrated by two commercial carbon products (YP-50F and YP-80F, Kuraray Europe GmbH, Vantaa, Finland), obtained from coconuts. The capacitance performance of YP-50F and YP-80F was evaluated in three types of basic electrolytes: 6 M LiOH, 6 M NaOH and 6 M KOH. It was found that the capacitance performance of YP-50F improved in the following order: NaOH < LiOH < KOH; Meanwhile, for YP-80F, the order changes to LiOH < NaOH < KOH. After 1000 cycles, the cycling stability of both YP-50F and YP-80F increased in the order NaOH < LiOH < KOH. This order of performance improvement is determined by both the electrolyte conductivity and the interaction between the functional groups of carbonaceous materials and alkaline electrolytes. The reactivity of the functional groups was assessed by postmortem SEM/EDS and X-ray photoelectron spectroscopy (XPS) analyses of the electrodes after prolonged cycling.

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“…The activated carbon studied here was prepared from a biomass waste, namely argan nut shells, as described previously [28]. Briefly, the biomass was carbonized at 700°C under an N 2 atmosphere for 1 h to produce a char.…”

Section: Methodsmentioning

confidence: 99%

Aberration-corrected transmission electron microscopy of a non-graphitizing carbon

et al. 2022

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Non-graphitizing carbons (NGCs) are an important class of solid carbons which cannot be converted into graphite by high-temperature heat treatment. They include commercially valuable materials such as activated carbon and glassy carbon. These carbons have been intensively studied for decades, but there is still no agreement about their detailed atomic structure, or the reasons for their resistance to graphitization. The first models for graphitizing and NGCs were proposed by Rosalind Franklin in the early 1950s, and while these are broadly correct, they are incomplete. Many alternative models of NGCs have been put forward since Franklin's time, but none has received universal acceptance. Diffraction and spectroscopic techniques can provide important insights into the nature of these carbons, but only direct microscopic imaging can reveal their true atomic structure. Here, we apply aberration-corrected transmission electron microscopy to an activated carbon prepared from waste biomass and present evidence for the presence of pentagonal and heptagonal carbon rings. This provides support for a model of the structure of NGC made up of curved fragments in which non-hexagonal rings are dispersed randomly throughout hexagonal networks.

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A high energy storage supercapacitor based on nanoporous activated carbon electrode made from Argan shells with excellent ion transport in aqueous and non-aqueous electrolytes

Cited by 55 publications

References 55 publications

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Nanofiber-enrich activated carbon coin derived from tofu dregs as electrode materials for supercapacitor

Effect of Alkaline-Basic Electrolytes on the Capacitance Performance of Biomass-Derived Carbonaceous Materials

Aberration-corrected transmission electron microscopy of a non-graphitizing carbon

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