Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance Supercapacitors
Carbon nanomaterials derived from Acacia auriculiformis pods as electrodes for the electrochemical double-layer capacitors were explored. Four pyrolysis temperatures were set (400, 600, 800, and 1,000°C) to understand the role of temperature in biomass pyrolysis via a possible “self-activation” mech...
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Frontiers Media S.A.
2021-09-01
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| Series: | Frontiers in Energy Research |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fenrg.2021.744133/full |
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| author | Vinay S. Bhat Vinay S. Bhat Titilope John Jayeoye Thitima Rujiralai Uraiwan Sirimahachai Kwok Feng Chong Gurumurthy Hegde Gurumurthy Hegde |
| author_facet | Vinay S. Bhat Vinay S. Bhat Titilope John Jayeoye Thitima Rujiralai Uraiwan Sirimahachai Kwok Feng Chong Gurumurthy Hegde Gurumurthy Hegde |
| author_sort | Vinay S. Bhat |
| collection | DOAJ |
| description | Carbon nanomaterials derived from Acacia auriculiformis pods as electrodes for the electrochemical double-layer capacitors were explored. Four pyrolysis temperatures were set (400, 600, 800, and 1,000°C) to understand the role of temperature in biomass pyrolysis via a possible “self-activation” mechanism for the synthesis of carbon materials. The carbon materials synthesized at 800°C (AAC800) were found to exhibit a well-organized hierarchical porous structure, quantified further from N2 adsorption/desorption isotherms with a maximum specific surface area of 736.6 m2/g. Micropores were found to be contributing toward enhancing the specific surface area. AAC800 exhibited a maximum specific capacitance of 176.7 F/g at 0.5 A/g in 6.0 M KOH electrolyte in a three-electrode setup. A symmetric supercapacitor was fabricated using AAC800 as an active material in an organic electrolyte composed of 1.0 M tetraethylammonium tetrafluoroborate (TEABF4) as a conducting salt in the acetonitrile (ACN) solvent. The self-discharge of the cell/device was analyzed from fitting two different mathematical models; the cell also exhibited a remarkable coulombic efficiency of 100% over 10,000 charge/discharge cycles, retaining ∼93% capacitance at 2.3 V. |
| first_indexed | 2024-12-19T16:30:12Z |
| format | Article |
| id | doaj.art-8a1fcedc5cf24aa0b88c38a8468e7182 |
| institution | Directory Open Access Journal |
| issn | 2296-598X |
| language | English |
| last_indexed | 2024-12-19T16:30:12Z |
| publishDate | 2021-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Energy Research |
| spelling | doaj.art-8a1fcedc5cf24aa0b88c38a8468e71822022-12-21T20:14:13ZengFrontiers Media S.A.Frontiers in Energy Research2296-598X2021-09-01910.3389/fenrg.2021.744133744133Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance SupercapacitorsVinay S. Bhat0Vinay S. Bhat1Titilope John Jayeoye2Thitima Rujiralai3Uraiwan Sirimahachai4Kwok Feng Chong5Gurumurthy Hegde6Gurumurthy Hegde7Centre for Nano-materials and Displays (CND), B.M.S. College of Engineering, Bangalore, IndiaDepartment of Materials Science, Mangalore University, Mangalore, IndiaDivision of Physical Science, Faculty of Science, Prince of Songkla University, Songkhla, ThailandDivision of Physical Science, Faculty of Science, Prince of Songkla University, Songkhla, ThailandDivision of Physical Science, Faculty of Science, Prince of Songkla University, Songkhla, ThailandFaculty of Industrial Sciences and Technology, Universiti Malaysia Pahang, Gambang, MalaysiaCentre for Nano-materials and Displays (CND), B.M.S. College of Engineering, Bangalore, IndiaCHRIST (Deemed to be University), Bengaluru, IndiaCarbon nanomaterials derived from Acacia auriculiformis pods as electrodes for the electrochemical double-layer capacitors were explored. Four pyrolysis temperatures were set (400, 600, 800, and 1,000°C) to understand the role of temperature in biomass pyrolysis via a possible “self-activation” mechanism for the synthesis of carbon materials. The carbon materials synthesized at 800°C (AAC800) were found to exhibit a well-organized hierarchical porous structure, quantified further from N2 adsorption/desorption isotherms with a maximum specific surface area of 736.6 m2/g. Micropores were found to be contributing toward enhancing the specific surface area. AAC800 exhibited a maximum specific capacitance of 176.7 F/g at 0.5 A/g in 6.0 M KOH electrolyte in a three-electrode setup. A symmetric supercapacitor was fabricated using AAC800 as an active material in an organic electrolyte composed of 1.0 M tetraethylammonium tetrafluoroborate (TEABF4) as a conducting salt in the acetonitrile (ACN) solvent. The self-discharge of the cell/device was analyzed from fitting two different mathematical models; the cell also exhibited a remarkable coulombic efficiency of 100% over 10,000 charge/discharge cycles, retaining ∼93% capacitance at 2.3 V.https://www.frontiersin.org/articles/10.3389/fenrg.2021.744133/fullself-activationpyrolysisporous carbonsupercapacitorsorganic electrolyte |
| spellingShingle | Vinay S. Bhat Vinay S. Bhat Titilope John Jayeoye Thitima Rujiralai Uraiwan Sirimahachai Kwok Feng Chong Gurumurthy Hegde Gurumurthy Hegde Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance Supercapacitors Frontiers in Energy Research self-activation pyrolysis porous carbon supercapacitors organic electrolyte |
| title | Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance Supercapacitors |
| title_full | Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance Supercapacitors |
| title_fullStr | Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance Supercapacitors |
| title_full_unstemmed | Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance Supercapacitors |
| title_short | Acacia auriculiformis–Derived Bimodal Porous Nanocarbons via Self-Activation for High-Performance Supercapacitors |
| title_sort | acacia auriculiformis derived bimodal porous nanocarbons via self activation for high performance supercapacitors |
| topic | self-activation pyrolysis porous carbon supercapacitors organic electrolyte |
| url | https://www.frontiersin.org/articles/10.3389/fenrg.2021.744133/full |
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