Fan, Yujia;
Wang, Tianlei;
Asrosa, Rica;
Li, Bing;
Naresh, Nibagani;
Liu, Xiaopeng;
Guan, Shaoliang;
... Boruah, Buddha Deka; + view all
(2024)
Synergistic contribution of activated carbon and PEDOT:PSS in hybrid electrodes for high-performance planar micro-supercapacitors.
Chemical Engineering Journal
, 488
, Article 150672. 10.1016/j.cej.2024.150672.
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Abstract
The high-performance miniaturized micro-supercapacitors exhibit great potential due to their inherent properties of high-power density, fast charge–discharge rates, long cycle life, and wide working temperature range. However, there is a need to further enhance the energy density of micro-supercapacitors. In this study, we investigate a hybrid electrode material combination comprising activated carbon (AC) and polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) to fabricate symmetric micro-supercapacitors (SMSCs) and employ the advanced Microplotter technique for the effective loading of active materials onto microelectrodes. The combination of AC and PEDOT:PSS is fine-tuned to attain optimal charge storage. This involves leveraging the synergistic impact of electrical double-layer capacitance from AC and pseudocapacitance from PEDOT:PSS, resulting in enhanced charge storage performance. Additionally, PEDOT:PSS acts as a mixed ion–electron conducting adhesive, effectively binding AC particles together and facilitating the rapid transport of both ions and electrons. As a result, the AC-PEDOT:PSS SMSCs demonstrate an impressive charge storage performance compared to AC SMSCs. At 1 mA/cm2, the measured areal capacitance (device areal capacitances) is 29.5 mF/cm2 (11.8 mF/cm2) for AC-PEDOT:PSS and 15.7 mF/cm2 (6.3 mF/cm2) for AC SMSCs. Furthermore, the areal energies and powers, considering active materials, are found to be 2.79 µWh/cm2 at 0.8 mW/cm2, and considering the device area of the SMSC, they are 1.12 µWh/cm2 at 0.32 mW/cm2. Notably, the AC-PEDOT:PSS SMSCs exhibit a stable long-term capacitance with 85% capacitance retention even after 5000 cycles. This work highlights the significant potential of hybrid materials in improving energy storage performance and showcases the innovative application of the Microplotter technique.
| Type: | Article |
|---|---|
| Title: | Synergistic contribution of activated carbon and PEDOT:PSS in hybrid electrodes for high-performance planar micro-supercapacitors |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.cej.2024.150672 |
| Publisher version: | http://dx.doi.org/10.1016/j.cej.2024.150672 |
| Language: | English |
| Additional information: | Copyright © 2024 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
| Keywords: | Micro-supercapacitors; Synergistic contributions; PEDOT:PSS; Activated carbon |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > MAPS Faculty Office > Institute for Materials Discovery |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10190056 |
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