Fabrication and characterization of energy storing supercapacitor devices using coconut shell based activated charcoal electrode

Jain, Amrita; Tripathi, S. K.

doi:10.1016/j.mseb.2013.12.004

Cited by 72 publications

(23 citation statements)

References 26 publications

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“…Collapse of the pore wall is evidenced by an average pore size for PGNS that is lower than that of CNT composite. Damage to the pore wall causes burst pores to become smaller [7].…”

Section: Modification Activated Carbonmentioning

confidence: 99%

“…In addition, the pore distribution after carbonization and activation decreases from 8-10 nm to 3-8 nm. A substantial reduction in the amount of mesopores is caused by loss or destruction of the walls of the activated carbon [7]. The high specific surface area and the amount of mesopores provide a convenient adsorption of ions, which diffuse into the surface of the electrode [9].…”

Section: Surface Characteristicsmentioning

confidence: 99%

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The Effect of Carbon Nanotube Composite Addition on Biomass-Based Supercapacitor

Widiatmoko

Devianto

Nurdin

et al. 2016

J. Eng. Technol. Sci.

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Abstract. Electric vehicles are set to become a most attractive alternative transportation mode due to their high efficiency and low emission. Electric vehicles require an efficient energy storage system, e.g. a supercapacitor. Coconut shells have high lignocellulosic content and are not being fully utilized in Indonesia. The lignocellulose could be converted into activated carbon for use as the electrode on a hybrid supercapacitor. This research focused on studying the effect of the addition of carbon nanotube (CNT) composite to porous graphene-like nanosheets (PGNS) as the electrode on a hybrid supercapacitor. The PGNS and CNT composite were synthesized via simultaneous activation and carbonization. Nickel oxide was used as the counter electrode. The CNT composite had a large surface area of 1374.8 m 2 g -1 , pore volume of 1.1 cm 3 g, and pore size of 3.2 nm. On the other hand, the PGNS had a surface area of 666.1 m 2 g -1 , pore volume of 0.47 cm 3 g , and pore size of 2.8 nm. The electrode pair between the NiO and the activated carbon achieved 5.69 F/g and 94.1% cycle durability after 10 charging and discharging cycles. The composite had an energy density of 0.38 W h kg -1 . The aim of this research was to provide an alternative formula for producing high-performance supercapacitor materials.

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“…Collapse of the pore wall is evidenced by an average pore size for PGNS that is lower than that of CNT composite. Damage to the pore wall causes burst pores to become smaller [7].…”

Section: Modification Activated Carbonmentioning

confidence: 99%

Section: Surface Characteristicsmentioning

confidence: 99%

The Effect of Carbon Nanotube Composite Addition on Biomass-Based Supercapacitor

Widiatmoko

Devianto

Nurdin

et al. 2016

J. Eng. Technol. Sci.

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Section: Resultsmentioning

confidence: 99%

“…A high synthesis yield (37.78%) was observed for the BC, probably due to the high content (72.23%) of lignocellulosic components of the precursor material, pupunha palm sheath. 31 According to Yahya et al 32 higher yields are related to several factors, including the lignocellulosic component, the type of activation and the activating agent used in the synthesis. The chemical activation using phosphoric acid presents higher yields when compared to other activation methods, because acidic agents can lead to a depolymerization, dehydration and redistribution of the constituent biopolymers, favouring the conversion of aliphatic compounds to aromatic compounds.…”

Section: Synthesis Yield and Characterization Of Bcmentioning

confidence: 99%

Pepsin immobilization on biochar by adsorption and covalent binding, and its application for hydrolysis of bovine casein

Santos

Brito

Evaldo

et al. 2019

J of Chemical Tech & Biotech

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BACKGROUND The objective of this research was to compare the efficiency of pepsin immobilization by adsorption and covalent binding on biochar obtained from pupunha palm processing residue, and to use the immobilized enzyme in the hydrolysis of bovine casein. RESULTS The surface modification of biochar with glutaraldehyde was effective, as shown by Fourier transform infrared analyses and the texture properties of the carbons. Both activated and functionalized biochar showed high immobilization efficiency (>95%) and high enzyme‐support binding capacity (>96 mg g–1). During the activity assays, the functionalized carbon showed a higher casein hydrolysis rate when compared to the enzyme immobilized by adsorption, with values of 39.17 U and 32.67 U, respectively, and c. 95% of the activity of the free enzyme, after 60 min. CONCLUSION The functionalization of the biochar led to a surface modification of biochar by the insertion of amine‐aldehyde groups, which was responsible for the formation of strong interactions between the support material and the enzyme, thus providing a greater proteolytic activity when compared to immobilization by adsorption. The immobilized enzymes were able to maintain their proteolytic activity for more than seven cycles of reuse. © 2019 Society of Chemical Industry

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“…An activated charcoal electrode based on coconut shells was produced by a highly chemical intensive and a multi‐step process by Jain et al . giving 356.2 F g −1 as the specific capacitance, whereas an aerogel derived from whole fruit watermelon, from a chemical intensive process gave a specific capacitance of 333.1 F g −1 in 6 M KOH . While these hard coconut shells have the disadvantage of having the need to be pre‐processed and broken down in to fine powders before they can be used, the fruit remains have the practical problem of a short shelf‐life as they might decay and may prove to be unfit for use for large scale applications ,.…”

Section: Introductionmentioning

confidence: 99%

A Coconut Leaf Sheath Derived Graphitized N‐Doped Carbon Network for High‐Performance Supercapacitors

2017

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A highly graphitized nitrogen‐doped carbon network is synthesized from biomass, obtained from coconut tree leaf sheath and successfully demonstrates high energy storage properties for use in supercapacitors. A simple thermal physical activation in carbon dioxide atmosphere also enables the electrochemical activity of the carbon to be improved. A detailed study is carried out to understand the dependence of the electrochemical performance on parameters such as the concentration of urea used for doping, the activation temperature, and time of activation. An optimized sample is obtained to give a very high electrochemical performance. Our best sample, obtained by using a 0.5 M urea solution for doping, annealed at 700 °C under a N2 atmosphere and activated at an activation temperature of 800 °C under a CO2 atmosphere, named 0.5 M‐700 N‐800C, gave a very high specific capacitance of 360.9 F g−1 in 2 M KOH in the potential window of 0 to −1.1 V. This performance as a negative electrode exceeds the specific capacitance of graphene hydrogels (305 F g−1) that we prepared and is more than that of commercially available activated carbon 218.18 F g−1. Thus, it brings to light the possibility of using our material as an efficient, cheap substitute for negative electrode materials like graphene, carbon nanotubes, and activated carbon. This process is facile, extremely cheap, and environmental friendly, which utilizes urea, a non‐hazardous nitrogen dopant.

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Fabrication and characterization of energy storing supercapacitor devices using coconut shell based activated charcoal electrode

Cited by 72 publications

References 26 publications

The Effect of Carbon Nanotube Composite Addition on Biomass-Based Supercapacitor

The Effect of Carbon Nanotube Composite Addition on Biomass-Based Supercapacitor

Pepsin immobilization on biochar by adsorption and covalent binding, and its application for hydrolysis of bovine casein

A Coconut Leaf Sheath Derived Graphitized N‐Doped Carbon Network for High‐Performance Supercapacitors

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