Preparation of Hierarchical Porous Activated Carbon from Banana Leaves for High‐performance Supercapacitor: Effect of Type of Electrolytes on Performance
| Autor: | Shakhawat H. Firoz, Akter Hossain Reaz, Al-Nakib Chowdhury, Hasan Zahir, Chanchal K. Roy, Sharmin Sultana, Mohammed Ameen Ahmed Qasem, Syed Shaheen Shah, Abdul Aziz |
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| Rok vydání: | 2021 |
| Předmět: |
Supercapacitor
1-Butyl-3-methylimidazolium hexafluorophosphate 010405 organic chemistry Organic Chemistry chemistry.chemical_element General Chemistry 010402 general chemistry 01 natural sciences Biochemistry 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Specific surface area Hexafluorophosphate Ionic liquid medicine Specific energy Carbon Activated carbon medicine.drug |
| Zdroj: | Chemistry – An Asian Journal. 16:296-308 |
| ISSN: | 1861-471X 1861-4728 |
| Popis: | We demonstrate a facile efficient way to fabricate activated carbon nanosheets (ACNSs) consisting of hierarchical porous carbon materials. Simply heating banana leaves with K2 CO3 produce ACNSs having a unique combination of macro-, meso- and micropores with a high specific surface area of ∼1459 m2 g-1 . The effects of different electrolytes on the electrochemical supercapacitor performance and stability of the ACNSs are tested using a two-electrode system. The specific capacitance (Csp ) values are 55, 114, and 190 F g-1 in aqueous 0.5 M sodium sulfate, organic 1 M tetraethylammonium tetrafluoroborate in acetonitrile, and pure ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6 ]) electrolytes, respectively. The ACNSs also shows the largest potential window of 3.0 V, the highest specific energy (59 Wh kg-1 ) and specific power (750 W kg-1 ) in [BMIM][PF6 ]. A mini-prototype device is prepared to demonstrate the practicality of the ACNSs. |
| Databáze: | OpenAIRE |
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