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Kandasamy A, Ramasamy T, Samrin A, Narayanasamy P, Mohan R, Bazaka O, Levchenko I, Bazaka K, Mohandas M. Hierarchical Doped Gelatin-Derived Carbon Aerogels: Three Levels of Porosity for Advanced Supercapacitors. NANOMATERIALS 2020; 10:nano10061178. [PMID: 32560290 PMCID: PMC7353417 DOI: 10.3390/nano10061178] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 06/09/2020] [Accepted: 06/10/2020] [Indexed: 02/06/2023]
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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Affiliation(s)
- Ayshuwarya Kandasamy
- Center for Nanoscience and Technology, Anna University, Chennai 600025, India; (A.K.); (T.R.); (A.S.)
| | - Tamilselvi Ramasamy
- Center for Nanoscience and Technology, Anna University, Chennai 600025, India; (A.K.); (T.R.); (A.S.)
| | - Ayesha Samrin
- Center for Nanoscience and Technology, Anna University, Chennai 600025, India; (A.K.); (T.R.); (A.S.)
| | | | - Ramesh Mohan
- Smart Sensors, CSIR-Central Electronics Engineering Research Institute, Pilani, Rajasthan 333031, India;
| | - Olha Bazaka
- School of Science, RMIT University, PO Box 2476, Melbourne, VIC 3001, Australia;
| | - Igor Levchenko
- Plasma Sources and Application Centre/Space Propulsion Centre Singapore, NIE, Nanyang Technological University, Singapore 637616, Singapore;
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Kateryna Bazaka
- Plasma Sources and Application Centre/Space Propulsion Centre Singapore, NIE, Nanyang Technological University, Singapore 637616, Singapore;
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
- Research School of Electrical, Energy and Materials Engineering, The Australian National University, Canberra, ACT 2601, Australia
- Correspondence: (K.B.); (M.M.)
| | - Mandhakini Mohandas
- Center for Nanoscience and Technology, Anna University, Chennai 600025, India; (A.K.); (T.R.); (A.S.)
- Correspondence: (K.B.); (M.M.)
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