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Electrochemical performance of nanofibrous highly flexible electrodes enhanced by different structural configurations
Amirkabir Univ Technol, Iran.
Amirkabir Univ Technol, Iran.
Amirkabir Univ Technol, Iran.
Linköping University, Department of Physics, Chemistry and Biology, Biosensors and Bioelectronics. Linköping University, Faculty of Science & Engineering. Hacettepe Univ, Turkey.
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2018 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 155, p. 81-90Article in journal (Refereed) Published
Abstract [en]

Due to their unique physicomechanical properties, one dimensional (1D) nanostructured conductive materials offer remarkable potential as a flexible electroactive medium for developing miniaturized electronic devices such as supercapacitors, sensors and actuators. In this work, thin films composed of nanocomposite nanofibers with two different architectures, i.e. whiskered nanofibers (WNFs) and hierarchical-structured nanofibers (H-SNFs), were fabricated and their capability to serve as flexible and bendable electrodes were evaluated. The main difference of these two architectures is how the distributions of the nano-fillers (carboxylated multiwalled carbon nanotubes, CMWCNTs) through the nanofibers, i.e. the isotropic and anisotropic arrangements, lead to WNFs and H-SNFs, respectively. The percolation threshold of conduction for the H-SNFs (composed of 0.5 wt% CMWCNTs) and the WNFs (composed of 5 wt% CMWCNTs) were 0.13 S cm(-1) and 0.07 S cm(-1), respectively. Moreover, according to the electrochemical characterizations, although the WNFs had ten orders of magnitude higher nanotube content, the electroactivity and electron transfer rate of H-SNFs was considerably higher than those of WNFs, so that the cyclic voltammetric peak currents of H-SNFs was approximately 1.6 times higher than that of WNFs. As a proof-of-concept, our results indicate that the structural configuration is a major determinative factor, which can largely dictate the final electrical and electrochemical properties of the nanocomposite nanofibers. The bending durability results showed good electrochemical performance even upon 100 bending cycles with 120 bending angles (retained 93.4% and 83.3% of the initial peak currents for H-SNFs and WNFs, respectively). These two flexible nanocomposite nanofibrous structures could be promising materials for the development of flexible electrodes for biosensing to energy storage applications. (C) 2017 Elsevier Ltd. All rights reserved.

Place, publisher, year, edition, pages
ELSEVIER SCI LTD , 2018. Vol. 155, p. 81-90
Keyword [en]
Nanocomposite nanofibers; Flexible electrodes; Whiskered nanofibers; Hierarchical architectures; Electrospinning
National Category
Composite Science and Engineering
Identifiers
URN: urn:nbn:se:liu:diva-145235DOI: 10.1016/j.compscitech.2017.11.031ISI: 000424186800010OAI: oai:DiVA.org:liu-145235DiVA, id: diva2:1188350
Note

Funding Agencies|Ministry of Science, Research and Technology of Iran; Linkoping University; European Commission [PIEF-GA-2013-629251]

Available from: 2018-03-07 Created: 2018-03-07 Last updated: 2018-03-23

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The full text will be freely available from 2019-12-02 15:53
Available from 2019-12-02 15:53

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