Activated graphene oxide/reduced graphene oxide electrodes and low viscous sulfonium cation based ionic liquid incorporated flexible gel polymer electrolyte for high rate supercapacitors
| Autor: | Mohd Suleman, Ramli Omar, S. A. Hashmi, M. R M Jasni, Mohamad Deraman, Yogesh Kumar, Mohd. Amir Radhi Othman |
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| Rok vydání: | 2017 |
| Předmět: |
Supercapacitor
Materials science Graphene Mechanical Engineering Inorganic chemistry Metals and Alloys Oxide 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Capacitance 0104 chemical sciences law.invention chemistry.chemical_compound chemistry Mechanics of Materials law Ionic liquid Materials Chemistry Specific energy Plastic crystal 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 695:3376-3392 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.12.023 |
| Popis: | High rate performance of symmetrical electrical-double layer capacitors (EDLCs) constructed with activated graphene oxide (ac-GO)/activated reduced graphene oxide (ac-RGO) electrodes and ionic liquid (triethylsulfonium bis(trifluoromethylsulfonyl)imide, incorporated plastic crystal succinonitrile (SN) based flexible gel polymer electrolytes (GPE) have been reported. The 3D architecture with predominantly meso-porous character of the ac-RGO, in combination with SN-based high ion conducting GPE, renders it a high rate electrode with high value of knee frequency, fk (∼966 Hz), low response time τ0 (∼20 ms) and high pulse power P0 (∼111 kW kg−1) as compared to the ac-GO-electrode that exhibits the corresponding values: fk (∼215 Hz), τ0 (∼60 ms) and P0 (∼58 kW kg−1). The ac-RGO based EDLCs offer higher specific power (∼118 kW kg−1) than that for ac-GO-based EDLC (∼41 kW kg−1), as evaluated from GCD studies. However, due to the additional pseudo-capacitance arising from leftover oxygen functional groups, the ac-GO-electrodes exhibit higher values of specific capacitance and specific energy (∼88–96 F g−1 and 25 Wh kg−1, respectively) as compared to the ac-RGO based EDLCs with specific capacitance ∼66–72 F g−1 and specific energy ∼18 Wh kg−1). Both the EDLC cells exhibit stable capacitive performance up to ∼11,000–13,000 GCD cycles. |
| Databáze: | OpenAIRE |
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