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Article

Jackfruit Seed-Derived Nanoporous Carbons as the Electrode Material for Supercapacitors

1
Amrit Campus, Tribhuvan University, Kathmandu 44613, Nepal
2
International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Ibaraki, Tsukuba 305-0044, Japan
3
Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
*
Author to whom correspondence should be addressed.
Received: 16 October 2020 / Revised: 30 October 2020 / Accepted: 5 November 2020 / Published: 6 November 2020
Hierarchically porous activated carbon materials from agro-waste, Jackfruit seeds are prepared by a chemical activation method involving the treatment with zinc chloride (ZnCl2) at different temperatures (600–1000 °C). The electrochemical supercapacitance performances of the prepared materials were studied in an aqueous electrolyte (1 M sulfuric acid, H2SO4) in a three-electrode system. Jackfruit seed carbons display nanoporous structures consisting of both micro- and mesopore architectures and they are amorphous in nature and also contain oxygenated surface functional groups, as confirmed by powder X-ray diffraction (pXRD), Raman scattering, and Fourier-transformed infrared (FTIR) spectroscopy, respectively. The surface areas and pore volumes were found to be 1216.0 to 1340.4 m2·g−1 and 0.804 to 1.144 cm3·g−1, respectively, demonstrating the better surface textural properties compared to the commercial activated carbons. Due to the high surface area, large pore volume, and well developed hierarchical micro- and mesoporosity, the optimal sample achieved a high specific capacitance of 292.2 F·g−1 at 5 mV·s−1 and 261.3 F·g−1 at 1 A·g−1 followed by outstanding high rate capability. The electrode sustained 71.6% capacity retention at a high current density of 20 A·g−1. Furthermore, the electrode displayed exceptional cycling stability with small capacitance loss (0.6%) even after 10,000 charging–discharging cycles, suggesting that Jackfruit seed would have potential in low-cost and scalable production of nanoporous carbon materials for supercapacitors applications. View Full-Text
Keywords: agricultural waste; Jackfruit seed; chemical activation; nanoporous carbon; supercapacitors agricultural waste; Jackfruit seed; chemical activation; nanoporous carbon; supercapacitors
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MDPI and ACS Style

Chaudhary, R.; Maji, S.; Shrestha, R.G.; Shrestha, R.L.; Shrestha, T.; Ariga, K.; Shrestha, L.K. Jackfruit Seed-Derived Nanoporous Carbons as the Electrode Material for Supercapacitors. C 2020, 6, 73. https://0-doi-org.brum.beds.ac.uk/10.3390/c6040073

AMA Style

Chaudhary R, Maji S, Shrestha RG, Shrestha RL, Shrestha T, Ariga K, Shrestha LK. Jackfruit Seed-Derived Nanoporous Carbons as the Electrode Material for Supercapacitors. C. 2020; 6(4):73. https://0-doi-org.brum.beds.ac.uk/10.3390/c6040073

Chicago/Turabian Style

Chaudhary, Rashma, Subrata Maji, Rekha G. Shrestha, Ram L. Shrestha, Timila Shrestha, Katsuhiko Ariga, and Lok K. Shrestha 2020. "Jackfruit Seed-Derived Nanoporous Carbons as the Electrode Material for Supercapacitors" C 6, no. 4: 73. https://0-doi-org.brum.beds.ac.uk/10.3390/c6040073

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