Sajid, Imran Haider and Aslfattahi, Navid and Salleh, Mohd Faiz Mohd and Ghazali, Nik Nazri Nik and Saidur, R. and Tahir, Muhammad and Bashir, Mohamed Bashir Ali and Sabri, Mohd Faizul Mohd (2024) High thermoelectric performance of multiwalled carbon nanotubes based ionogels. Materials Today Communications, 38. p. 108334. ISSN 2352-4928, DOI https://doi.org/10.1016/j.mtcomm.2024.108334.
Full text not available from this repository.Abstract
Ionogels have emerged as promising thermoelectric materials with Seebeck coefficient 2-3 orders of magnitude higher than Seebeck coefficient of their inorganic counter parts. However, they suffer from the problem of low ionic conductivity, which can be improved with the addition of inorganic nanofillers to the ionogels. In the present work, thermoelectric performance of multiwall carbon nanotubes (MWCNTs) based ionogels (IGs) has been investigated. IGs were synthesized via in situ radical polymerization of polyethylene glycol 200 dimethacrylate (PEG200DMA) difunctional monomer in the presence of 1-butyl-3-methyl imidazolium tetrafluoroborate (an ionic liquid) and MWCNTs. Three composites namely MWCNTs-0.25, MWCNTs-0.5 and MWCNTs-1 were prepared having the concentration of MWCNTs by 0.25, 0.5 and 1 wt% respectively. A remarkable 75.3% enhancement in ionic conductivity was achieved for the MWCNTs-1 wt% ionogel compared to the base IG at 40 degrees C. This substantial improvement can be attributed to the ``breathing polymer chain model,'' which describes the dissociation of ion aggregates due to the interaction between the ionic liquid and polymer chains. In terms of thermoelectric performance amongst the MWCNT ionogels, 0.25 wt% MWCNT-based ionogels was the optimized concentration with very high Seebeck coefficient of 1.70 mV/K and power factor of 4.1 mu W/m. K along with excellent thermal stability up to 386 degrees C. These high-performing ionogels hold great promise for efficient utilization of low-grade thermal energy.
| Item Type: | Article |
|---|---|
| Funders: | Sunway University (STR- RCTR-RCNMET-001-2019), Ministry of Education, Malaysia (FRGS/1/2016/TK10/UM/02/1), King Khalid University King Saud University (RGP.2/303/44) |
| Uncontrolled Keywords: | Ionic Seebeck coefficient; Ionic conductivity; Thermal conductivity; Multiwall carbon nanotubes; Ionogel |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | Faculty of Engineering > Department of Electrical Engineering Faculty of Engineering > Department of Mechanical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 06 Nov 2024 04:58 |
| Last Modified: | 06 Nov 2024 04:58 |
| URI: | http://eprints.um.edu.my/id/eprint/45614 |
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