Investigation on pore structure regulation of activated carbon derived from sargassum and its application in supercapacitor

Li, Shijie; Tan, Xiaopeng; Li, Hui; Gao, Yan; Wang, Qian; Li, Guoning; Guo, Min

doi:10.1038/s41598-022-14214-w

Cited by 18 publications

(7 citation statements)

References 64 publications

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“…CV of ATC at several scan rates in the range of 10‐100 mV s −1 was performed and demonstrated in Figure S7A,B and Figure 5A. Nature of CV curves supported the capacitive behavior occurring on the electrode/electrolyte interface 49 . The quasi‐rectangular CV curves exhibited the characteristics of ZHC capacitive charge‐discharge behavior.…”

Section: Resultsmentioning

confidence: 76%

Teak wood derived porous carbon: An efficient cathode material for zinc‐ion hybrid supercapacitor

Chakraborty,

Paul,

Ghosh

et al. 2023

Energy Storage

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An appealing choice for energy storage system that merges the advantages of zinc‐ion battery with supercapacitor is the zinc‐ion hybrid supercapacitor (ZHS). Carbonaceous materials have recently received significant attention as the viable cathode material for ZHS. Carbon‐based materials having large surface area and suitable pore structure exhibit fast kinetics and good charge storage behavior in ZHS. Carbonization temperature plays a vital role in optimizing surface area and developing the pore structure of the carbon. Activated carbon is successfully prepared from teak wood at different carbonization temperatures of ~600°C, 750°C, and 900°C, followed by KOH activation. The teak wood‐derived material carbonized at ~750°C (ATC2) shows the highest specific surface area of ~898.16 m2 g−1. Fabricated ZHS with ATC2 as cathode delivers the highest specific capacitance of ~116 F g−1 at 0.5 A g−1 and exhibits outstanding capacitance retention of ~102.8% after 10 000 continuous galvanostatic charge‐discharge cycles recorded at 10 A g−1. In addition, the device shows ~42 W h kg−1 energy density at ~408 W kg−1 power density. The fabricated ZHS can power an LED and a digital clock, suggesting its potential application as energy storage device.

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Section: Resultsmentioning

confidence: 76%

Teak wood derived porous carbon: An efficient cathode material for zinc‐ion hybrid supercapacitor

Chakraborty,

Paul,

Ghosh

et al. 2023

Energy Storage

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“…Average pore diameters of run 4, run 9, and run 12 are 2.2, 3.6, and 2.4 nm, respectively. Temperature is a significant effect on pore diameter that leads to collapse on the pore walls and increases the average pore diameter . Even if run 9 and run 12 are carried out at the same temperature (750 °C), different biomass-to-chemical agent ratios effect their average diameter.…”

Section: Resultsmentioning

confidence: 99%

“…Based on the IUPAC classifications of physiosorption isotherms, OC1 showed I-type isotherms that indicate a microporous structure . However, OC2 exhibited IV-type isotherms that show condensation in meso-/macropores with hysteresis loops at the relative pressure of P / P o = 0.4 . Similarly, a micro-/mesoporous carbon structure was obtained with elephant grass activated with ZnCl 2 .…”

Section: Resultsmentioning

confidence: 99%

“…52 However, OC2 exhibited IV-type isotherms that show condensation in meso-/macropores with hysteresis loops at the relative pressure of P/Po = 0.4. 46 Similarly, a micro-/mesoporous carbon structure was obtained with elephant grass activated with ZnCl 2 . 53 ZnCl 2 is considered a good activator for producing carbon material with a microporous structure.…”

Section: Characterization Of the Carbon Produced Atmentioning

confidence: 95%

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Miscanthus-Derived Energy Storage System Material Production

2023

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Carbon derived from various biomass sources has been evaluated as support material for thermal energy storage systems. However, process optimization of Miscanthus-derived carbon to be used for encapsulating phase change materials has not been reported to date. In this study, process optimization to evaluate the effects of selected operation parameters of pyrolysis time, temperature, and biomass:catalyst mass ratio on the surface area and pore volume of produced carbon is conducted using response surface methodology. In the process, ZnCl2 is used as a catalyst to promote high pore volume and area formation. Two sets of optimum conditions with different pyrolysis operation parameters in order to produce carbons with the highest pore area and volume are determined as 614 °C, 53 min, and 1:2 biomass to catalyst ratio and 722 °C, 77 min, and 1:4 biomass to catalyst ratio with 1415.4 m2/g and 0.748 cm3/g and 1499.8 m2/g and 1.443 cm3/g total pore volume, respectively. Carbon material produced at 614 °C exhibits mostly micro- and mesosized pores, while carbon obtained at 722 °C comprises mostly of meso- and macroporous structures. Findings of this study demonstrate the significance of process optimization for designing porous carbon material to be used in thermal and electrochemical energy storage systems.

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“…Various carbon materials, such as activated carbon and carbon nanotubes (CNTs) [ 7 ], are used as electrode materials in EDLCs [ 8 ]. Activated carbon is the most widely used electrode material for EDLCs due to the availability of the raw materials, mature preparation methods, low cost, and nontoxicity [ 9 ]. Recently, agricultural waste has been used as a precursor material to produce activated carbon electrodes.…”

Section: Introductionmentioning

confidence: 99%

Physicochemical Modeling of Electrochemical Impedance in Solid-State Supercapacitors

et al. 2023

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Solid-state supercapacitors (SSCs) consist of porous carbon electrodes and gel-polymer electrolytes and are used in novel energy storage applications. The current study aims to simulate the impedance of SSCs using a clearly defined equivalent circuit (EC) model with the ultimate goal of improving their performance. To this end, a conventional mathematical and a physicochemical model were adapted. The impedance was measured by electrochemical impedance spectroscopy (EIS). An EC consisting of electrical elements was introduced for each modeling approach. The mathematical model was purely based on a best-fit method and utilized an EC with intuitive elements. In contrast, the physicochemical model was motivated by advanced theories and allowed meaningful associations with properties at the electrode, the electrolyte, and their interface. The physicochemical model showed a higher approximation ability (relative error of 3.7%) due to the interface impedance integration in a more complex circuit design. However, this model required more modeling and optimization effort. Moreover, the fitted parameters differed from the analytically calculated ones due to uncertainties in the SSC’s microscale configuration, which need further investigations. Nevertheless, the results show that the proposed physicochemical model is promising in simulating EIS data of SSCs with the additional advantage of utilizing well-reasoned property-based EC elements.

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Investigation on pore structure regulation of activated carbon derived from sargassum and its application in supercapacitor

Cited by 18 publications

References 64 publications

Teak wood derived porous carbon: An efficient cathode material for zinc‐ion hybrid supercapacitor

Teak wood derived porous carbon: An efficient cathode material for zinc‐ion hybrid supercapacitor

Miscanthus-Derived Energy Storage System Material Production

Physicochemical Modeling of Electrochemical Impedance in Solid-State Supercapacitors

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