In Situ Fabrication of Activated Carbon from a Bio-Waste Desmostachya bipinnata for the Improved Supercapacitor Performance
| Autor: | Amit Srivastava, Anchal Srivastava, Gopal Krishna Gupta, Sumit Kumar Pandey, Jai Govind Singh, Monika Srivastava, Ashwani Kumar Singh, Pinky Sagar, S.K. Srivastava |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Desmostachya bipinnata Activated carbon Nanochemistry 02 engineering and technology 010402 general chemistry 01 natural sciences Capacitance Electrochemical double-layer capacitance medicine General Materials Science Porosity Materials of engineering and construction. Mechanics of materials Power density Supercapacitor Bio-waste material biology 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification 0104 chemical sciences Chemical engineering TA401-492 Kusha grass Cyclic voltammetry 0210 nano-technology medicine.drug |
| Zdroj: | Nanoscale Research Letters, Vol 16, Iss 1, Pp 1-12 (2021) |
| Popis: | Herein, we demonstrate the fabrication of highly capacitive activated carbon (AC) using a bio-waste Kusha grass (Desmostachya bipinnata), by employing a chemical process followed by activation through KOH. The as-synthesized few-layered activated carbon has been confirmed through X-ray powder diffraction, transmission electron microscopy, and Raman spectroscopy techniques. The chemical environment of the as-prepared sample has been accessed through FTIR and UV–visible spectroscopy. The surface area and porosity of the as-synthesized material have been accessed through the Brunauer–Emmett–Teller method. All the electrochemical measurements have been performed through cyclic voltammetry and galvanometric charging/discharging (GCD) method, but primarily, we focus on GCD due to the accuracy of the technique. Moreover, the as-synthesized AC material shows a maximum specific capacitance as 218 F g−1 in the potential window ranging from − 0.35 to + 0.45 V. Also, the AC exhibits an excellent energy density of ~ 19.3 Wh kg−1 and power density of ~ 277.92 W kg−1, respectively, in the same operating potential window. It has also shown very good capacitance retention capability even after 5000th cycles. The fabricated supercapacitor shows a good energy density and power density, respectively, and good retention in capacitance at remarkably higher charging/discharging rates with excellent cycling stability. Henceforth, bio-waste Kusha grass-derived activated carbon (DP-AC) shows good promise and can be applied in supercapacitor applications due to its outstanding electrochemical properties. Herein, we envision that our results illustrate a simple and innovative approach to synthesize a bio-waste Kusha grass-derived activated carbon (DP-AC) as an emerging supercapacitor electrode material and widen its practical application in electrochemical energy storage fields. |
| Databáze: | OpenAIRE |
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