Flexible supercapacitors based on free-standing polyaniline/single-walled carbon nanotube films

Advances in supercapacitor performance are boosted both by material design helping to improve specific capacitance and by tailoring of device architecture, often addressing flexibility to enable rolling-up packaging to reach high nominal values. This keeps attention to flexible lightweight materials...

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Veröffentlicht in:Journal of power sources Jg. 541; S. 231691
Hauptverfasser: Panasenko, Iurii V., Bulavskiy, Mikhail O., Iurchenkova, Anna A., Aguilar-Martinez, Yenanny, Fedorov, Fedor S., Fedorovskaya, Ekaterina O., Mikladal, Bjørn, Kallio, Tanja, Nasibulin, Albert G.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Elsevier B.V 01.09.2022
Schlagworte:
Composite
Cyclic voltammetry
Electrodeposition
Engineering Science with specialization in Nanotechnology and Functional Materials
Polyaniline
Single-walled carbon nanotubes
Supercapacitor
Teknisk fysik med inriktning mot nanoteknologi och funktionella material
Cyclic voltammetry
Supercapacitor
Electrodeposition
Composite
Polyaniline
Single-walled carbon nanotubes
ISSN:0378-7753, 1873-2755, 1873-2755
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Zusammenfassung:Advances in supercapacitor performance are boosted both by material design helping to improve specific capacitance and by tailoring of device architecture, often addressing flexibility to enable rolling-up packaging to reach high nominal values. This keeps attention to flexible lightweight materials, such as single-walled carbon nanotubes (SWCNTs), and conducting polymers, such as polyaniline (PANI). In this work, we design and study unique “dead-weight” free supercapacitors based on PANI electrochemically deposited on free-standing SWCNT films. Depending on the carbon nanotube film characteristics, we adjusted polymer inclusion into the nanotube films and evaluated its structure by TEM, SEM, XPS and Raman spectroscopy. Electrochemical methods were used to investigate the relationship between the morphology of initial SWCNT films, deposited PANI, and the electrochemical properties of the composite materials, including specific gravimetric capacitance and self-discharge processes. We show that thin free-standing films of SWCNTs with deposited PANI are less prone to self-discharge due to higher resistance arising from the lower density of the nanotubes in the film. Yet, such films enable better and more uniform deposition allowing to reach the maximum gravimetric capacitance value of 541 F g−1. This synergistic performance allows the creation of an electrode material for flexible ultra-light and powerful supercapacitors. [Display omitted] •“Dead-weight” free flexible supercapacitor is designed.•The supercapacitor is based on free-standing SWCNT film and PANI composite.•Thin SWCNT films serve as a substrate for PANI in situ deposition.•SWCNTs provide high capacitance retention for PANI/SWCNT composite.•The highest achieved specific gravimetric capacitance is 541 F g−1.
ISSN:0378-7753
1873-2755
1873-2755
DOI:10.1016/j.jpowsour.2022.231691