TY - JOUR

T1 - Flexible supercapacitors based on free-standing polyaniline/single-walled carbon nanotube films

AU - Panasenko, Iurii V.

AU - Bulavskiy, Mikhail O.

AU - Iurchenkova, Anna A.

AU - Aguilar-Martinez, Yenanny

AU - Fedorov, Fedor S.

AU - Fedorovskaya, Ekaterina O.

AU - Mikladal, Bjørn

AU - Kallio, Tanja

AU - Nasibulin, Albert G.

N1 - Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Prof. Ekaterina O. Fedorovskaya reports financial support provided by Russian Foundation for Basic Research. Dr. Fedor S. Fedorov reports financial support provided by Russian Science Foundation. Prof. Albert G. Nasibulin reports financial support provided by Council on grants of the President of the Russian Federation.We thank Dr. Timur Aslyamov (Skolkovo Institute of Science and Technology) and Prof. Leif Nyholm (Uppsala University) for fruitful discussions. This work was supported jointly by the Russian Foundation for Basic Research and the Royal Society of London for Improving Natural Knowledge (project 20-53-10004 KO_a). Aalto Nanomicroscopy Center is acknowledged for its support of SEM and TEM studies. F. F. acknowledges the Russian Science Foundation (project No. 21-73-10288). A. N. thanks the Council on grants of the President of the Russian Federation grant number НШ-1330.2022.1.3. Publisher Copyright: © 2022 Elsevier B.V.

PY - 2022/9/1

Y1 - 2022/9/1

N2 - 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.

AB - 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.

KW - Composite

KW - Cyclic voltammetry

KW - Electrodeposition

KW - Polyaniline

KW - Single-walled carbon nanotubes

KW - Supercapacitor

UR - http://www.scopus.com/inward/record.url?scp=85132426410&partnerID=8YFLogxK

U2 - 10.1016/j.jpowsour.2022.231691

DO - 10.1016/j.jpowsour.2022.231691

M3 - Article

AN - SCOPUS:85132426410

VL - 541

JO - Journal of Power Sources

JF - Journal of Power Sources

SN - 0378-7753

M1 - 231691

ER -