<i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor Applications
The electrical double-layer supercapacitance performance of the nanoporous carbons prepared from the <i>Phyllanthus emblica</i> (Amala) seed by chemical activation using the potassium hydroxide (KOH) activator is reported. KOH activation was carried out at different temperatures (700–100...
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MDPI AG
2022-11-01
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| Online Access: | https://www.mdpi.com/1996-1944/15/23/8335 |
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| author | Lok Kumar Shrestha Sabina Shahi Chhabi Lal Gnawali Mandira Pradhananga Adhikari Rinita Rajbhandari Bhadra P. Pokharel Renzhi Ma Rekha Goswami Shrestha Katsuhiko Ariga |
| author_facet | Lok Kumar Shrestha Sabina Shahi Chhabi Lal Gnawali Mandira Pradhananga Adhikari Rinita Rajbhandari Bhadra P. Pokharel Renzhi Ma Rekha Goswami Shrestha Katsuhiko Ariga |
| author_sort | Lok Kumar Shrestha |
| collection | DOAJ |
| description | The electrical double-layer supercapacitance performance of the nanoporous carbons prepared from the <i>Phyllanthus emblica</i> (Amala) seed by chemical activation using the potassium hydroxide (KOH) activator is reported. KOH activation was carried out at different temperatures (700–1000 °C) under nitrogen gas atmosphere, and in a three-electrode cell set-up the electrochemical measurements were performed in an aqueous 1 M sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) solution. Because of the hierarchical pore structures with well-defined micro- and mesopores, <i>Phyllanthus emblica</i> seed-derived carbon materials exhibit high specific surface areas in the range of 1360 to 1946 m<sup>2</sup> g<sup>−1</sup>, and the total pore volumes range from 0.664 to 1.328 cm<sup>3</sup> g<sup>−1</sup>. The sample with the best surface area performed admirably as the supercapacitor electrode-material, achieving a high specific capacitance of 272 F g<sup>−1</sup> at 1 A g<sup>−1</sup>. Furthermore, it sustained 60% capacitance at a high current density of 50 A g<sup>−1</sup>, followed by a remarkably long cycle-life of 98% after 10,000 subsequent charging/discharging cycles, demonstrating the electrode’s excellent rate-capability. These results show that the <i>Phyllanthus emblica</i> seed would have significant possibilities as a sustainable carbon-source for the preparing high-surface-area activated-carbons desired in high-energy-storage supercapacitors. |
| first_indexed | 2024-03-09T17:42:25Z |
| format | Article |
| id | doaj.art-3ff3b36a49974cc2b452d955d30d91d1 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T17:42:25Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-3ff3b36a49974cc2b452d955d30d91d12023-11-24T11:26:25ZengMDPI AGMaterials1996-19442022-11-011523833510.3390/ma15238335<i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor ApplicationsLok Kumar Shrestha0Sabina Shahi1Chhabi Lal Gnawali2Mandira Pradhananga Adhikari3Rinita Rajbhandari4Bhadra P. Pokharel5Renzhi Ma6Rekha Goswami Shrestha7Katsuhiko Ariga8International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, JapanCentral Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu 44613, NepalDepartment of Applied Sciences and Chemical Engineering, Pulchowk Campus, Institute of Engineering (IOE), Tribhuvan University, Lalitpur, Kathmandu 44700, NepalCentral Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu 44613, NepalDepartment of Applied Sciences and Chemical Engineering, Pulchowk Campus, Institute of Engineering (IOE), Tribhuvan University, Lalitpur, Kathmandu 44700, NepalDepartment of Applied Sciences and Chemical Engineering, Pulchowk Campus, Institute of Engineering (IOE), Tribhuvan University, Lalitpur, Kathmandu 44700, NepalInternational Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, JapanInternational Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, JapanInternational Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba 305-0044, Ibaraki, JapanThe electrical double-layer supercapacitance performance of the nanoporous carbons prepared from the <i>Phyllanthus emblica</i> (Amala) seed by chemical activation using the potassium hydroxide (KOH) activator is reported. KOH activation was carried out at different temperatures (700–1000 °C) under nitrogen gas atmosphere, and in a three-electrode cell set-up the electrochemical measurements were performed in an aqueous 1 M sulfuric acid (H<sub>2</sub>SO<sub>4</sub>) solution. Because of the hierarchical pore structures with well-defined micro- and mesopores, <i>Phyllanthus emblica</i> seed-derived carbon materials exhibit high specific surface areas in the range of 1360 to 1946 m<sup>2</sup> g<sup>−1</sup>, and the total pore volumes range from 0.664 to 1.328 cm<sup>3</sup> g<sup>−1</sup>. The sample with the best surface area performed admirably as the supercapacitor electrode-material, achieving a high specific capacitance of 272 F g<sup>−1</sup> at 1 A g<sup>−1</sup>. Furthermore, it sustained 60% capacitance at a high current density of 50 A g<sup>−1</sup>, followed by a remarkably long cycle-life of 98% after 10,000 subsequent charging/discharging cycles, demonstrating the electrode’s excellent rate-capability. These results show that the <i>Phyllanthus emblica</i> seed would have significant possibilities as a sustainable carbon-source for the preparing high-surface-area activated-carbons desired in high-energy-storage supercapacitors.https://www.mdpi.com/1996-1944/15/23/8335<i>Phyllanthus emblica</i> seedchemical activation (KOH)hierarchically porous carbonelectrochemical energy storagesupercapacitor |
| spellingShingle | Lok Kumar Shrestha Sabina Shahi Chhabi Lal Gnawali Mandira Pradhananga Adhikari Rinita Rajbhandari Bhadra P. Pokharel Renzhi Ma Rekha Goswami Shrestha Katsuhiko Ariga <i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor Applications Materials <i>Phyllanthus emblica</i> seed chemical activation (KOH) hierarchically porous carbon electrochemical energy storage supercapacitor |
| title | <i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor Applications |
| title_full | <i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor Applications |
| title_fullStr | <i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor Applications |
| title_full_unstemmed | <i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor Applications |
| title_short | <i>Phyllanthus emblica</i> Seed-Derived Hierarchically Porous Carbon Materials for High-Performance Supercapacitor Applications |
| title_sort | i phyllanthus emblica i seed derived hierarchically porous carbon materials for high performance supercapacitor applications |
| topic | <i>Phyllanthus emblica</i> seed chemical activation (KOH) hierarchically porous carbon electrochemical energy storage supercapacitor |
| url | https://www.mdpi.com/1996-1944/15/23/8335 |
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