Preparation of capacitor’s electrode from cassava peel waste

Ismanto, Andrian Evan; Wang, Steven; Soetaredjo, Felycia Edi; Ismadji, Suryadi

doi:10.1016/j.biortech.2009.12.123

Cited by 229 publications

(109 citation statements)

References 23 publications

(27 reference statements)

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“…The KOH reacted carbon in this process creates porous structure. [33,34] The porosity of the carbon can be controlled by varying the concentration of the activating agent.…”

Section: Resultsmentioning

confidence: 99%

Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

et al. 2017

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energy supply are required. Hence, an efficient local energy storage/production system plays a vital role for such applications. [1] The supercapacitor is one of the efficient energy storage systems which can store energy via electric double layer and faradic reactions. [2,3] The electric double layer capacitor (EDLC) stores the charge over the active surface area of the material and shows very durable performance over long period. [3,4] Thus, creating carbon with a high surface area could be one of the ways to improve the performance of EDLC-based supercapacitor devices. There are several publications documenting the utilization of waste-derived carbon source such as seeds, seed shells, leaves, bagasse, waste paper, and tyre. [5][6][7][8][9][10][11][12] Waste tea is an additional exciting source for carbon. [13] Most of the time, an activation step is required to achieve the high surface area to enhance the performance of the carbon. Activation of waste-derived carbon can be done using various methods including chemical, steam, and CO 2 -based activation. [14][15][16][17] For example, steam activated carbon from fir wood showed an activated surface area of 1131 m 2 g −1 while, CO 2 activated empty fruit bunches of palm showed a surface area of 1704 m 2 g −1 . [12,13] KOH activation is the most popular way to create high surface area and Used tea leaves are utilized for preparation of carbon with high surface area and electrochemical properties. Surface area and pore size of tea leaves derived carbon are controlled by varying the amount of KOH as activating agent. The maximum surface area of 2532 m 2 g −1 is observed, which is much higher than unactivated tea leaves (3.6 m 2 g −1 ). It is observed that the size of the electrolyte ions has a profound effect on the energy storage capacity. The maximum specific capacitance of 292 F g −1 is observed in 3 m KOH electrolyte with outstanding cyclic stability, while the lowest specific capacitance of 246 F g −1 is obtained in 3 m LiOH electrolyte at 2 mV s −1 . The tea leaves derived electrode shows almost 100% capacitance retention up to 5000 cycles of study. The symmetrical supercapacitor device shows a maximum specific capacitance of 0.64 F cm −2 at 1 mA cm −2 and about 95% of specific capacitance is retained after increasing current density to 12 mA cm −2 , confirming the high rate stability of the device. An improvement over 35% in the charge storage capacity is seen when increasing device temperature from 10 to 80 °C. The study suggests that used tea leaves can be used for the fabrication of environment friendly high performance supercapacitor devices at a low cost.

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“…The KOH reacted carbon in this process creates porous structure. [33,34] The porosity of the carbon can be controlled by varying the concentration of the activating agent.…”

Section: Resultsmentioning

confidence: 99%

Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

et al. 2017

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“…It the case of an electrochemical application, the activated carbon modified by dry methods is most frequently used. Mostly KOH, NaOH, H 3 PO 4 and ZnCl 2 are used with high temperature and inert atmosphere, in order to develop the surface area of the carbon material [7,[17][18][19]. However, the application of steam, oxygen or plasma treatment can also incorporate the heteroatoms into the structure of carbon, which also has an influence on the electrochemical properties of the active material [2,20,21].…”

Section: Introductionmentioning

confidence: 99%

Persulfate treatment as a method of modifying carbon electrode material for aqueous electrochemical capacitors

Kopczyński

Pęziak-Kowalska

Lota

et al. 2016

J Solid State Electrochem

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The activated carbon was modified by the wet method with a solution of ammonium persulfate at room temperature with different times. Kinetics studies showed that the modification took place mostly during the first 60 min of the process. The physicochemical properties of the obtained carbon were evaluated by thermogravimetric studies, Raman and FTIR spectroscopy, elementary and BET analyses. Furthermore, the fabricated material was applied in symmetric capacitors operated on the three aqueous electrolytes (1 M H 2 SO 4 , 6 M KOH and 1 M Na 2 SO 4 ). Mild conditions of the modification process are optimal to obtain electroactive groups on the carbon surface, which make this material useful in a supercapacitor application. In our studies, we noticed that this type of functional groups mainly appears on the surface of the activated carbon, in the first oxidation stage. With prolonged oxidation, they may transform into undesirable groups. The results show that this kind of modification improves the capacity of all the tested supercapacitors. It was connected mainly with an increase of the carbon material's wettability and in the case of capacitor operated in acid and base electrolytes due to a redox reaction of oxygen functional groups.

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“…The materials displayed an extraordinarily high capacitance (368 F/g) at a current density of 0.05 A/g in two-electrode cell and an excellent stability after 10,000 chargedischarge cycles [8]. An attempt was made by Ismanto et al for the preparation of activated carbon derived from agricultural waste (i.e., cassava peel) through KOH-chemical activation and CO 2 physical activation approaches [10]. The material was used as an electrode to configure a supercapacitor device, which displayed a capacitance of 153 F/g [10].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, the specific surface area and pore size play key roles in determining the electrocapacitive properties [6][7][8][9][10]. Rufford and co-workers developed a nanoporous carbon from waste coffee beans with pore sizes ranging from less than 1 nm (narrow micropores) to 4 nm (mesopores) [8].…”

Section: Introductionmentioning

confidence: 99%

“…An attempt was made by Ismanto et al for the preparation of activated carbon derived from agricultural waste (i.e., cassava peel) through KOH-chemical activation and CO 2 physical activation approaches [10]. The material was used as an electrode to configure a supercapacitor device, which displayed a capacitance of 153 F/g [10]. Recently, sugars (e.g., xylose, fructose, glucose, and sucrose) have been utilized as a carbon precursor to synthesize porous carbon materials via activation [6,[11][12][13], template [14][15][16], and hydrothermal methods [5,17,18].…”

Section: Introductionmentioning

confidence: 99%

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Preparation of nanoporous carbon microspheres by subcritical water carbonization and electrocapacitive study

Kurniawan

Effendi

Ong

et al. 2013

Electrochimica Acta

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Preparation of capacitor’s electrode from cassava peel waste

Cited by 229 publications

References 23 publications

Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

Eco‐Friendly and High Performance Supercapacitors for Elevated Temperature Applications Using Recycled Tea Leaves

Persulfate treatment as a method of modifying carbon electrode material for aqueous electrochemical capacitors

Preparation of nanoporous carbon microspheres by subcritical water carbonization and electrocapacitive study

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