Preparation of porous agro-waste-derived carbon from onion peel for supercapacitor application

Mehare, M. D.; Deshmukh, Abhay D.; Dhoble, S.J.

doi:10.1007/s10853-019-04236-7

Cited by 81 publications

(32 citation statements)

References 67 publications

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“…This leads to the complexity of the experimental set-up resulting in an increase in production cost. [72] To overcome these complications, Mehare et al used onion peels collected from local farms to prepare porous carbon electrodes for supercapacitor through a cost-effective simple double crucible method without the incorporation of any activation step. The electrode possessed a high specific capacitance of 127 F g −1 at 0.75 A g −1 and a capacitance retention of 109% over 2000 cycles with 1 m H 2 SO 4 electrolyte in a three-electrode system with Ag/ AgCl and Pt as the reference and counter electrodes, respectively.…”

Section: Agricultural and Food Waste-derived Biomass In Supercapacitomentioning

confidence: 99%

“…This leads to the complexity of the experimental set‐up resulting in an increase in production cost. [ 72 ] To overcome these complications, Mehare et al. used onion peels collected from local farms to prepare porous carbon electrodes for supercapacitor through a cost‐effective simple double crucible method without the incorporation of any activation step.…”

Section: Solid Waste Materials In Supercapacitor Fabricationmentioning

confidence: 99%

“…The fabricated symmetric supercapacitor exhibited a maximum energy density of 13.61 W h kg −1 and a maximum power density of 2020.5 W kg −1 with capacitance retention over 100% beyond 14 000 cycles. [ 72 ] Similarly, Diya and Rajalakshmi developed supercapacitor electrodes from Solanum lycopersicum leaves without any external activation. The electrode possessed a surface area of 325.05 m 2 g −1 and a specific capacitance of 345 F g −1 at 0.5 A g −1 .…”

Section: Solid Waste Materials In Supercapacitor Fabricationmentioning

confidence: 99%

“…Therefore, of late, due emphasis has also been laid on the evolution of eco‐friendly supercapacitors. Benign materials retrieved from carbon‐rich agricultural and food biowaste, [ 9,52–75,105,115,116 ] industrial waste, [ 76–79 ] paper, [ 74,80,81 ] and cotton [ 82 ] have been used in their fabrication. Additionally, carbon acquired from discarded polymers [ 83–95 ] as well as valuable metals and metal composites recuperated from electronic waste including spent batteries [ 96–102 ] have been utilized in the preparation of supercapacitor electrodes.…”

Section: Introductionmentioning

confidence: 99%

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Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Dutta

Mahanta

Banerjee

2020

Advanced Sustainable Systems

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Supercapacitors store electrical energy on the basis of electrostatic attraction between opposite charges as a result of the formation of an electric double layer (EDL) at the electrolyte/electrode interface. Carbon-derived materials are commonly used to fabricate supercapacitor electrodes owing to their high electrical conductivity, high capacitance, excellent porosity, good electrochemical stability, and large specific surface area. [131-136] Predominantly, these materials include carbon nanotubes (CNTs), graphene, carbon spheres, hollow carbon spheres, carbon nanoparticles (CNPs), etc. [62,137-145] Nevertheless, they fail to demonstrate the desirable performance in practical applications after a certain threshold owing to their short durability and low energy density. Although, metal-organic frameworks (MOFs) have proven to be better electrode candidates in certain aspects, [142,143,146-148] however, these materials incur high cost, low yield of porous carbon, high consumption of metallic nitrate, [62] and hence higher waste generation. Due to the rising concerns of waste production and its management and hence the need for sustainable and cheap resources, reusing and/or converting waste from various sources such as industrial, agricultural, food, and spent electronic devices efficiently into usable carbon has attracted much interest since recently.

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Section: Agricultural and Food Waste-derived Biomass In Supercapacitomentioning

confidence: 99%

Section: Solid Waste Materials In Supercapacitor Fabricationmentioning

confidence: 99%

Section: Solid Waste Materials In Supercapacitor Fabricationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Dutta

Mahanta

Banerjee

2020

Advanced Sustainable Systems

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“…Chemical acids are used as intercalating agents to obtain exfoliated graphite by different processes [10][11][12][13] . This activated carbon can be obtained from various agricultural wastes 14,15 .…”

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confidence: 99%

Comparison of acid exfoliators in carbon nanosheets synthesis from stinging nettle (Urtica dioica) for electrochemical applications

Nuilek

Wongwiriyapan

Sattayarut

et al. 2020

Sci Rep

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Carbon nanosheets (CNs) were successfully synthesized from nettle stem (NS) which is an inexpensive material with a high carbon content that is abundantly available in nature. CNs were produced using chemical (potassium hydroxide activation and acid exfoliation) and thermal treatments. Sulfuric (H2SO4), phosphoric (H3PO4) and nitric (HNO3) acid solutions were used for exfoliation. CNs exfoliated by H3PO4 have higher specific surface area (789 m2 g−1) compared to CNs exfoliated by H2SO4 (705 m2 g−1) and HNO3 (106 m2 g−1). In this work, NSCNs were found to be a potential candidate for electrode material in electrochemical capacitors. The maximum specific capacitance of the NSCNs exfoliated by H3PO4 is found to be 27.3 F g−1 at a current density of 0.05 A g−1, while the specific capacitance of NSCNs exfoliated by H2SO4 and HNO3 is 9.34 F g−1 and 1.71 F g−1, respectively. Energy density (0.06–0.95 Wh kg−1) and power density (20.9–26.7 W kg−1) of NSCNs are confirmed to be supercapacitor materials and can be applied in energy storage devices.

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A Low‐Temperature Dehydration Carbon‐Fixation Strategy for Lignocellulose‐Based Hierarchical Porous Carbon for Supercapacitors

Chen

Yang

et al. 2021

ChemSusChem

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Lignocellulose-based hierarchical porous carbon is a very promising electrode material for supercapacitors, but lower volumetric energy density and yield have hindered its practical applications. Herein, a low-temperature dehydration carbonfixation method using NH 4 Cl as modification reagent was developed to prepare rice husk-based hierarchical porous carbon (RHPC) with high volumetric performance and yield. The RHPC-N electrode exhibited a higher volumetric specific capacitance of 134.4 F cm À 3 than that of the RHPC electrode (98.4 F cm À 3 ) in 1 m Et 4 NBF 4 /propylene carbonate electrolyte.The volumetric energy density (28.8 Wh L À 1 ) of the RHPC-N electrode was 37.1 % higher than that of the RHPC electrode (21.0 Wh L À 1 ), which greatly enhanced the practical application potential of RHPC in supercapacitors. Moreover, the yield of RHPC increased 1.2 times by this method, which greatly improved the production capacity and reduced the cost. This research establishes a simple and highly efficient method to improve the volumetric energy density and the yield of lignocellulose-based hierarchical porous carbon.

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Preparation of porous agro-waste-derived carbon from onion peel for supercapacitor application

Cited by 81 publications

References 67 publications

Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Supercapacitors in the Light of Solid Waste and Energy Management: A Review

Comparison of acid exfoliators in carbon nanosheets synthesis from stinging nettle (Urtica dioica) for electrochemical applications

A Low‐Temperature Dehydration Carbon‐Fixation Strategy for Lignocellulose‐Based Hierarchical Porous Carbon for Supercapacitors

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