Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

Taer, Erman; Taslim, Rika; Apriwandi, Apriwandi

doi:10.1002/cnma.202100388

Cited by 12 publications

(14 citation statements)

References 84 publications

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“…However, the KOH electrolyte appeared a GCD curve that contained the greatest ion degradation characterized by a charging time, which is significantly different from the discharging time. This is closely related to oxygen heteroatoms with the potential of the evolution of O 2 and H 2 in aqueous electrolyte systems . It was also discovered that the iR drop was relatively very low, confirming the high conductivity properties of the MOLs750 precursor as summarized in Table .…”

Section: Resultssupporting

confidence: 55%

“…This is confirmed similarly to the previous study. 31,60 Moreover, the higher scan rate also confirms the performance of the capacitive properties of carbon MOLs as shown in Figure 5f. The scan rate treatment of 1 to 10 mV s −1 significantly reduced the specific capacitance caused by their pore size distribution.…”

Section: Table 2 Porosity Properties Of Molssupporting

confidence: 62%

“…This is closely related to oxygen heteroatoms with the potential of the evolution of O 2 and H 2 in aqueous electrolyte systems. 65 It was also discovered that the iR drop was relatively very low, confirming the high conductivity properties of the MOLs750 precursor as summarized in Table 3 .…”

Section: Resultsmentioning

confidence: 52%

“…. 31 The hightemperature pyrolysis of the precursor MOLs allows the decomposition and rearrangement of the carbon structure to initiate good amorphous behavior. 32 Furthermore, the properties of the carbon disc structure of MOLs changed during the high-temperature pyrolysis process including carbonization and physical activation.…”

Section: Resultsmentioning

confidence: 99%

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Novel Moringa oleifera Leaves 3D Porous Carbon-Based Electrode Material as a High-Performance EDLC Supercapacitor

2022

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Biomass-based activated carbon has great potential in the use of its versatile 3D porous structures as an excellent electrode material in presenting high conductivity, large porosity, and outstanding stability for electrochemical energy storage devices. In this study, the electrode material develops through a novel consolidated carbon disc binder-free design, which was derived from Moringa oleifera leaves (MOLs) for electrochemical double-layer capacitor applications. The carbon discs are prepared in a series of treatments of precarbonized, chemical impregnation of zinc chloride, integrated pyrolysis of N 2 carbonization, and CO 2 physical activation. The physical activation temperatures applied at 650, 750, and 850 °C optimize the precursor potential. By optimizing the 3D hierarchical pore properties of the MOL750, the carbon disc binder-free design demonstrates optimal symmetric supercapacitor performance with a high specific capacitance of 307 F g −1 at a current density of 1 A g −1 in an aqueous electrolyte solution of 1 M H 2 SO 4 . Furthermore, the extremely low internal resistance (0.006Ω) of the carbon disc initiated excellent electrical conductivity. The supercapacitors also maintain their high capacitive properties in aqueous electrolyte solutions of 6 M KOH and 1 M Na 2 SO 4 , respectively. The results show that a novel consolidated carbon disc binder-free design can be obtained from biomass MOLs through a reasonable approach to develop superior electrode materials to enhance high-performance electrochemical energy storage devices.

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Section: Resultssupporting

confidence: 55%

Section: Table 2 Porosity Properties Of Molssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Novel Moringa oleifera Leaves 3D Porous Carbon-Based Electrode Material as a High-Performance EDLC Supercapacitor

2022

Self Cite

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“…The results showed that when the mass ratio of pinecone to ZnCl 2 was 1:4 under the pyrolysis temperature of 600 °C, the specific surface area, pore volume and mesoporosity were up to 1703 m 2 /g, 1.86 cm 3 /g and 90.1%, which enhanced 2.58, 6.91 and 3.66 times compared with that not treated with activation, respectively. Taer et al [ 121 ] studied the pyrolysis temperature impact on the activation effect of banana leaves. According to Figure 13 d–f, it could found that banana leaves-derived carbon had a more superior pore structure at the pyrolysis temperature of 800 °C (66.6%) and 900 °C (67.4%).…”

Section: Pore Size Regulation Methodsmentioning

confidence: 99%

Advances in Micro-/Mesopore Regulation Methods for Plant-Derived Carbon Materials

et al. 2022

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In recent years, renewable and clean energy has become increasingly important due to energy shortage and environmental pollution. Selecting plants as the carbon precursors to replace costly non-renewable energy sources causing severe pollution is a good choice. In addition, owing to their diverse microstructure and the rich chemical composition, plant-based carbon materials are widely used in many fields. However, some of the plant-based carbon materials have the disadvantage of possessing a large percentage of macroporosity, limiting their functionality. In this paper, we first introduce two characteristics of plant-derived carbon materials: diverse microstructure and rich chemical composition. Then, we propose improvement measures to cope with a high proportion of macropores of plant-derived carbon materials. Emphatically, size regulation methods are summarized for micropores (KOH activation, foam activation, physical activation, freezing treatment, and fungal treatment) and mesopores (H3PO4 activation, enzymolysis, molten salt activation, and template method). Their advantages and disadvantages are also compared and analyzed. Finally, the paper makes suggestions on the pore structure improvement of plant-derived carbon materials.

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Impact of Preprocessing of Graphene Additive via Ultrasonication on the Electrochemical Performance of Activated Carbon‐Based Supercapacitors

Chameh,

Shaker,

Shahalizade

et al. 2023

Energy Tech

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This article investigates the influence of the addition method of graphene to activated carbon (AC) on the electrochemical performance of the fabricated electric double‐layer capacitors (EDLCs). To do so, the same graphene material was introduced to the other electrode slurry materials either in the form of a powder (GP) or a suspension (GL). It is discovered that the introduction of graphene already dispersed by ultrasonic waves in a suspension to AC has a better effect on the electrochemical performance of the fabricated EDLCs than directly employing its powder. GL EDLC achieved the highest capacitance of 54 F g‐1 at a current density of 0.05 A g‐1 in an organic electrolyte, which is much better than the GP EDLC (41.9 F g‐1) and about 77% more than AC EDLC. Moreover, after cycling at various current densities (totally 2000 cycles), GL EDLC maintained 28.8 F g‐1 of its capacitance with 99.4% coulombic efficiency at a current density of 1 A g‐1. Finally, GL EDLC exhibited 35.8 and 21.4 Wh kg‐1 energy densities at 50.2 and 1102.8 W kg‐1 power densities, respectively. The better performance of GL EDLC in comparison with GP EDLC is ascribed to better graphene dispersion in the liquid media and separation of graphene sheets to form a larger number of thinner graphene plates, which makes it possible to employ the uttermost capabilities of graphene.This article is protected by copyright. All rights reserved.

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Ultrahigh Capacitive Supercapacitor Derived from Self‐Oxygen Doped Biomass‐Based 3D Porous Carbon Sources

Cited by 12 publications

References 84 publications

Novel Moringa oleifera Leaves 3D Porous Carbon-Based Electrode Material as a High-Performance EDLC Supercapacitor

Novel Moringa oleifera Leaves 3D Porous Carbon-Based Electrode Material as a High-Performance EDLC Supercapacitor

Advances in Micro-/Mesopore Regulation Methods for Plant-Derived Carbon Materials

Impact of Preprocessing of Graphene Additive via Ultrasonication on the Electrochemical Performance of Activated Carbon‐Based Supercapacitors

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