Hierarchical doped gelatin-derived carbon aerogels: Three levels of porosity for advanced supercapacitors

Ayswarya Kandasamy; Tamilselvi Ramasamy; Ayesha Samrin; Padmanathan Narayanasamy; Ramesh Mohan; Olha Bazaka; Igor Levchenko; Kateryna Bazaka; Mandhakini Mohandas

doi:10.3390/nano10061178

Hierarchical doped gelatin-derived carbon aerogels: Three levels of porosity for advanced supercapacitors

Ayswarya Kandasamy, Tamilselvi Ramasamy, Ayesha Samrin, Padmanathan Narayanasamy, Ramesh Mohan, Olha Bazaka, Igor Levchenko, Kateryna Bazaka^*, Mandhakini Mohandas^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

17 Citations (Scopus)

Abstract

Nitrogen-doped graphene-based aerogels with three levels of hierarchically organized pores were prepared via a simple environmentally friendly process, and successfully tested in supercapacitor applications. Mesopores and macropores were formed during the aerogel preparation followed by carbonization and its chemical activation by potassium hydroxide (KOH). These mesopores and macropores consist of amorphous carbon and a 3D graphene framework. Thermal treatment at 700^◦C, 800^◦C, 900^◦C in N₂ atmosphere was done to etch out the amorphous carbon and obtain a stable N-doped 3D graphene. Specific capacitance values obtained from the electrochemical measurements are in the range of 232–170 F× g⁻¹ . The thus fabricated structures showed excellent cyclic stability, suggesting that these materials have potential as electrodes for solid asymmetric supercapacitors.

Original language	English
Article number	1178
Pages (from-to)	1-16
Number of pages	16
Journal	Nanomaterials
Volume	10
Issue number	6
DOIs	https://doi.org/10.3390/nano10061178
Publication status	Published - Jun 2020

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title = "Hierarchical doped gelatin-derived carbon aerogels: Three levels of porosity for advanced supercapacitors",

abstract = "Nitrogen-doped graphene-based aerogels with three levels of hierarchically organized pores were prepared via a simple environmentally friendly process, and successfully tested in supercapacitor applications. Mesopores and macropores were formed during the aerogel preparation followed by carbonization and its chemical activation by potassium hydroxide (KOH). These mesopores and macropores consist of amorphous carbon and a 3D graphene framework. Thermal treatment at 700◦C, 800◦C, 900◦C in N2 atmosphere was done to etch out the amorphous carbon and obtain a stable N-doped 3D graphene. Specific capacitance values obtained from the electrochemical measurements are in the range of 232–170 F× g−1 . The thus fabricated structures showed excellent cyclic stability, suggesting that these materials have potential as electrodes for solid asymmetric supercapacitors.",

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author = "Ayswarya Kandasamy and Tamilselvi Ramasamy and Ayesha Samrin and Padmanathan Narayanasamy and Ramesh Mohan and Olha Bazaka and Igor Levchenko and Kateryna Bazaka and Mandhakini Mohandas",

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year = "2020",

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doi = "10.3390/nano10061178",

language = "English",

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T1 - Hierarchical doped gelatin-derived carbon aerogels

T2 - Three levels of porosity for advanced supercapacitors

AU - Kandasamy, Ayswarya

AU - Ramasamy, Tamilselvi

AU - Samrin, Ayesha

AU - Narayanasamy, Padmanathan

AU - Mohan, Ramesh

AU - Bazaka, Olha

AU - Levchenko, Igor

AU - Bazaka, Kateryna

AU - Mohandas, Mandhakini

PY - 2020/6

Y1 - 2020/6

N2 - Nitrogen-doped graphene-based aerogels with three levels of hierarchically organized pores were prepared via a simple environmentally friendly process, and successfully tested in supercapacitor applications. Mesopores and macropores were formed during the aerogel preparation followed by carbonization and its chemical activation by potassium hydroxide (KOH). These mesopores and macropores consist of amorphous carbon and a 3D graphene framework. Thermal treatment at 700◦C, 800◦C, 900◦C in N2 atmosphere was done to etch out the amorphous carbon and obtain a stable N-doped 3D graphene. Specific capacitance values obtained from the electrochemical measurements are in the range of 232–170 F× g−1 . The thus fabricated structures showed excellent cyclic stability, suggesting that these materials have potential as electrodes for solid asymmetric supercapacitors.

AB - Nitrogen-doped graphene-based aerogels with three levels of hierarchically organized pores were prepared via a simple environmentally friendly process, and successfully tested in supercapacitor applications. Mesopores and macropores were formed during the aerogel preparation followed by carbonization and its chemical activation by potassium hydroxide (KOH). These mesopores and macropores consist of amorphous carbon and a 3D graphene framework. Thermal treatment at 700◦C, 800◦C, 900◦C in N2 atmosphere was done to etch out the amorphous carbon and obtain a stable N-doped 3D graphene. Specific capacitance values obtained from the electrochemical measurements are in the range of 232–170 F× g−1 . The thus fabricated structures showed excellent cyclic stability, suggesting that these materials have potential as electrodes for solid asymmetric supercapacitors.

KW - Graphene based aerogel

KW - Porosity

KW - Supercapacitors

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U2 - 10.3390/nano10061178

DO - 10.3390/nano10061178

M3 - Article

SN - 2079-4991

VL - 10

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EP - 16

JO - Nanomaterials

JF - Nanomaterials

IS - 6

M1 - 1178

ER -

Hierarchical doped gelatin-derived carbon aerogels: Three levels of porosity for advanced supercapacitors

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