Villan, Mohammed Aslam and Chowdhury, Arnab and Parker, Bradyn J. and Bhardwaj, Bhupesh and Cameron, Neil R. and Subramaniam, Chandramouli (2024) Photothermally enhanced ion-transport in solid-state, non-Faradic energy storage devices for sub-freezing operability. Chemical Engineering Journal, 500. ISSN 1385-8947, DOI https://doi.org/10.1016/j.cej.2024.156617.
Full text not available from this repository.Abstract
The universal direct dependence of ionic mobility on temperature severely restricts the low-temperature operation of energy storage devices. We overcome this limitation by synergizing photothermal conversion with electrochemical energy storage, using non-graphitizable nanocarbon florets (NCF) as multi-functional electrodes. NCF-based supercapacitors leverage the photothermal energy, directing it to the High Internal Phase Emulsion polymer (poly-HIPE) infused ionic conductor BMIm]-TFSI], resulting in 15% increase in specific capacitance (Csp) at 30( degrees)C and a 45% at -30 C-degrees. This is the first solid-state energy storage device usable at sub-freezing conditions (< - 4 C-degrees) without compromising its performance. Importantly, the device exhibits identical characteristics at 10 C-degrees (with sunlight) and 30 C-degrees (in the dark), thereby offsetting a temperature difference of 20 C-degrees. Experimental evidences points to the reduction in electrolyte resistance by 86% and 34% in relaxation time constant as the origin of such improved functioning. Furthermore, the advantage of processability is translated to configurational form-factor to efficiently heat the ionic conductor and thereby realise a 15% increase in Csp.
| Item Type: | Article |
|---|---|
| Funders: | Australian Research Council [Grant No: IC190100026] |
| Uncontrolled Keywords: | Solar-thermal conversion; Hard-carbons; Photothermal supercapacitor; Non-Faradic energy storage; Ionic liquids; Low temperature tolerance |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering T Technology > TP Chemical technology |
| Divisions: | Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 03 Nov 2025 07:38 |
| Last Modified: | 03 Nov 2025 07:38 |
| URI: | http://eprints.um.edu.my/id/eprint/46348 |
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