Electrochemical characterisations and ageing of ionic liquid/γ-butyrolactone mixtures as electrolytes for supercapacitor applications over a wide temperature range
| Autor: | Grégory Pognon, Pierre-Henri Aubert, Giao T. M. Nguyen, Sébastien Jus, Frédéric Vidal, Laure Dagousset |
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| Rok vydání: | 2017 |
| Předmět: |
Supercapacitor
Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology Buckypaper 02 engineering and technology Electrolyte Carbon nanotube Atmospheric temperature range 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Capacitance 0104 chemical sciences law.invention chemistry.chemical_compound Chemical engineering chemistry law Ionic liquid Organic chemistry Electrical and Electronic Engineering Physical and Theoretical Chemistry 0210 nano-technology |
| Zdroj: | Journal of Power Sources. 359:242-249 |
| ISSN: | 0378-7753 |
| DOI: | 10.1016/j.jpowsour.2017.05.068 |
| Popis: | Electrochemical properties in mesoporous media of three different ionic liquids (1-propyl-1-methylpyrrolidinium-bis(fluorosulfonyl)imide - Pyr13FSI, 1-butyl-1-methylpyrrolidinium-bis(trifluoromethanesulfonyl)imide - Pyr14TFSI and 1-ethyl-3-methylimidazolium-bis(trifluoromethanesulfonyl)imide - EMITFSI) are investigated from −50 °C to 100 °C and compared with binary mixtures with γ-butyrolactone (GBL). Buckypaper composed of Single-Wall Carbon Nanotubes (SWCNTs) are used to prepare and study coin-cell supercapacitors. Supercapacitor using Pyr13FSI/GBL present a rapid loss of capacitance after only a thousand cycles at 100 °C. On the contrary, EMITFSI/GBL and Pyr14TFSI/GBL prove to be very promising at high temperature (the capacitance loss after 10,000 cycles is 9% and 10%). More drastic ageing tests such as floating are also carried out for these two mixtures at 100 °C and −50 °C. 23% and 15% capacitance losses have been recorded after 500 h of floating at 100 °C for EMITFSI/GBL and Pyr14TFSI/GBL. The capacitance of supercapacitors based on Pyr14TFSI/GBL dropped by 20% after 200 h of floating at −50 °C rather than EMITFSI/GBL show a remarkable stability during floating at −50 °C, with 6.6% capacitance loss after 500 h (3 V at −50 °C). These results show that the mixture EMITFSI/GBL works properly all along the broad range of temperature [-50 °C to +100 °C] and thus proved that our approach is very promising for the development of high performances supercapacitors specifically adapted for extreme environment. |
| Databáze: | OpenAIRE |
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