Low cost, catalyst free, high performance supercapacitors based on porous nano carbon derived from agriculture waste
| Autor: | Ganesan Sriram, Vinay S. Bhat, Neena S. John, Pandiyaraj Kanagavalli, Ramya Prabhu B, Gurumurthy Hegde, Mahaveer D. Kurkuri, Murugan Veerapandian |
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| Rok vydání: | 2020 |
| Předmět: |
Supercapacitor
Materials science Renewable Energy Sustainability and the Environment 020209 energy Energy Engineering and Power Technology Sorption 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology Electrochemistry Capacitance Chemical engineering 0202 electrical engineering electronic engineering information engineering Specific energy Electrical and Electronic Engineering 0210 nano-technology Pyrolysis Faraday efficiency |
| Zdroj: | Journal of Energy Storage. 32:101829 |
| ISSN: | 2352-152X |
| DOI: | 10.1016/j.est.2020.101829 |
| Popis: | The present work exhibits experimental results obtained from the analysis of porous nano carbon synthesized from agriculture waste for the evaluation of high-performance supercapacitors. The material has been prepared by pyrolysis at different temperatures. All the synthesized materials were characterized using EDS, FE-SEM, TEM, FTIR, XPS, and Raman spectroscopy. Porous nature was determined from N2 sorption experiments. The electrochemical studies were done in three and two electrode setups. The maximum specific capacitance obtained was 174 F/g at 0.1 A/g in 4.0 M KOH electrolyte. The symmetric supercapacitor exhibited a specific capacitance of 119.2 F/g at 0.1 A/g and a specific energy of 32.6 Wh/kg. The device exhibited impeccable stability for 25,000 charge-discharge cycles, with 97.8% coulombic efficiency. Capacitance retention of 93% was observed even at the end of 10000th cycles, suggesting the huge capacity of biomass-derived non-activated carbon nanomaterials for efficient, stable high-performance electrodes in electrochemical energy storage applications. |
| Databáze: | OpenAIRE |
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