A Self-Healing Crease-Free Supramolecular All-Polymer Supercapacitor
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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Detail(s)
Original language | English |
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Article number | 2100072 |
Journal / Publication | Advanced Science |
Volume | 8 |
Issue number | 12 |
Online published | 1 May 2021 |
Publication status | Published - 23 Jun 2021 |
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DOI | DOI |
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Attachment(s) | Documents
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Link to Scopus | https://www.scopus.com/record/display.uri?eid=2-s2.0-85105196224&origin=recordpage |
Permanent Link | https://scholars.cityu.edu.hk/en/publications/publication(6e1e7ee1-87a9-47b4-b1e8-d7a4d1cd5d88).html |
Abstract
While traditional three-layer structure supercapacitors are under mechanical manipulations, the high-stress region concentrates, inevitably causing persistent structural problems including interlayer slippage, crease formation, and delamination of the electrode–electrolyte interface. Toward this, an all-polymeric, all-elastic and non-laminated supercapacitor with high mechanical reliability and excellent electrochemical performance is developed. Specifically, a polypyrrole electrode layer is in situ integrated into a silk fibroin-based elastic supramolecular hydrogel film with extensive hydrogen and covalent bonds, where a non-laminate device is realized with structural elasticity at the device level. The non-laminate configuration can avoid slippage and delamination, while the elasticity can preclude crease formation. Furthermore, under more severe mechanical damage, the supercapacitors can restore the electrochemical performance through non-autonomous self-healing capabilities, where the supramolecular design of host–guest interactions in the hydrogel matrix results in a superior self-healing efficiency approaching ≈95.8% even after 30 cutting/healing cycles. The all-elastic supercapacitor delivers an areal capacitance of 0.37 F cm−2 and a volumetric energy density of 0.082 mW h cm−3, which can well-maintain the specific capacitance even at −20 °C with over 85.2% retention after five cut/healing cycles.
Research Area(s)
- all-polymer approach, crease-free, self-healing capabilities, supercapacitors, supramolecular hydrogels
Citation Format(s)
A Self-Healing Crease-Free Supramolecular All-Polymer Supercapacitor. / Mo, Funian; Li, Qing; Liang, Guojin et al.
In: Advanced Science, Vol. 8, No. 12, 2100072, 23.06.2021.
In: Advanced Science, Vol. 8, No. 12, 2100072, 23.06.2021.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
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