Hierarchical porous carbon derived from Gardenia jasminoides Ellis flowers for high performance supercapacitor

Qin, Can; Wang, Shunrui; Wang, Zhipeng; Ji, Kai; Wang, Shunjie; Zeng, Xueying; Jiang, Xingmao; Liu, Gang

doi:10.1016/j.est.2020.102061

Cited by 77 publications

(23 citation statements)

References 71 publications

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“…6 , the fitted peaks of the C 1s XPS spectra are approximately located at 284.7 eV (C1), 285.5 eV (C2), 286.5 eV (C3), 287.6 eV (C4) and 288.4 eV (C5), corresponding to C–C/C C, C–H, C–OH in hydroxyl or ether groups, C O in carbonyl groups and O C–O in carboxylic or ester groups, respectively. 38 The fitted peaks of the O 1s XPS spectra are approximately located at 531.8 eV (O1), 533.1 eV (O2) and 534.2 eV (O3), corresponding to C O in ester or anhydride groups, C–O in hydroxyl groups or ether and COO– in carboxylic groups, respectively. 39 …”

Section: Resultsmentioning

confidence: 97%

Preparation and characterization of three-dimensional hierarchical porous carbon from low-rank coal by hydrothermal carbonization for efficient iodine removal

et al. 2022

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Section: Resultsmentioning

confidence: 97%

Preparation and characterization of three-dimensional hierarchical porous carbon from low-rank coal by hydrothermal carbonization for efficient iodine removal

et al. 2022

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“…More specifically, the electrolyte ions diffuse through the inner pores of the electrode material at lower scan rates where the entire active surface sites of the electrode material might be utilized during the adsorption/desorption process. In contrast, the ionic movement in the electrolyte is restricted at higher scan rates due to the limited reaction time and so, only the external surface area of the material is utilized for charge storage 83 …”

Section: Resultsmentioning

confidence: 99%

“…In contrast, the ionic movement in the electrolyte is restricted at higher scan rates due to the limited reaction time and so, only the external surface area of the material is utilized for charge storage. 83 Figure 6C and Figure S5B,E (Supporting information) shows the Nyquist plots of all of the ACHS samples. It can be observed from Figure 6C that the Exf.…”

Section: Electrochemical Energy Storage Analysismentioning

confidence: 99%

Sono‐exfoliated graphene‐like activated carbon from hazelnut shells for flexible supercapacitors

Reddygunta

Callander

Šiller

et al. 2022

Intl J of Energy Research

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Currently, more than 80% of commercial supercapacitors utilize chemically synthesized carbon nanomaterials which are expensive and necessitates non-renewable resources. Employing renewable, environment friendly and naturally available biomass feedstock as precursor for producing carbon materials is a low-cost and sustainable way for designing the electrodes of supercapacitors. In the present study, high surface area hierarchical porous multilayered graphene-like carbon is obtained via room temperature sono-exfoliation of the activated carbon synthesized via simple and environmentally friendly hydrothermal carbonization and potassium bicarbonate activation of waste hazelnut shells as the precursor. The high surface area graphene-like carbon showed excellent electrochemical performance with specific capacitance of 320.9 F g À1 at 0.2 A g À1 current density and exceptional capacitance retention of 77.8% at 2 A g À1 current density after 10 000 cycles in 1 M Na 2 SO 4 electrolyte. Moreover, flexible supercapacitors fabricated using sonoexfoliated graphene-like activated carbon coated stainless steel mesh electrodes and biopolymer gel electrolyte exhibits an outstanding energy density of 38.7 W h kg À1 and power density of 198.4 W kg À1 . These results show that mechanically exfoliated graphene-like activated carbon derived from hazelnut shells exhibit superior electrochemical performance that can compete with other activated carbon materials used in energy storage devices for real time applications.

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“…The peak at ~1334 cm −1 corresponds to the D band represents the structural defect and disorder. The peak at ~1600 cm −1 belongs to the G band, indicating the E 2g phonon of sp2 carbons [ 33 ]. The intensity ratio (I D /I G ) between the D band and the G band indicates the degree of graphitization.…”

Section: Resultsmentioning

confidence: 99%

Research on High-Value Utilization of Carbon Derived from Tobacco Waste in Supercapacitors

et al. 2021

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Large quantities of tobacco stalks residues are generated and discarded as crop waste or combusted directly every year. Thus, we need to find an appropriate way to dispose of this type of waste and recycle it. The conversion of biomass waste into electrode materials for supercapacitors is entirely in line with the concept of sustainability and green. In this paper, tobacco-stalk-based, porous activated carbon (TC) was successfully synthesized by high-temperature and high-pressure hydrothermal pre-carbonization and KOH activation. The synthesized TC had a high pore volume and a large surface area of 1875.5 m2 g−1, in which there were many mesopores and interconnected micro-/macropores. The electrochemical test demonstrated that TC-1 could reach a high specific capacitance of up to 356.4 F g−1 at a current density of 0.5 A g−1, which was carried in 6M KOH. Additionally, a symmetrical supercapacitor device was fabricated by using TC-1 as the electrode, which delivered a high energy density up to 10.4 Wh kg−1 at a power density of 300 W kg−1, and excellent long-term cycling stability (92.8% of the initial capacitance retention rate after 5000 cycles). Therefore, TC-1 is considered to be a promising candidate for high-performance supercapacitor electrode materials and is a good choice for converting tobacco biomass waste into a resource.

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Hierarchical porous carbon derived from Gardenia jasminoides Ellis flowers for high performance supercapacitor

Cited by 77 publications

References 71 publications

Preparation and characterization of three-dimensional hierarchical porous carbon from low-rank coal by hydrothermal carbonization for efficient iodine removal

Preparation and characterization of three-dimensional hierarchical porous carbon from low-rank coal by hydrothermal carbonization for efficient iodine removal

Sono‐exfoliated graphene‐like activated carbon from hazelnut shells for flexible supercapacitors

Research on High-Value Utilization of Carbon Derived from Tobacco Waste in Supercapacitors

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