Polypyrrole-carbon nanotube-cellophane composite plate with homogeneous network structure for flexible symmetric superca
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Polypyrrole‑carbon nanotube‑cellophane composite plate with homogeneous network structure for flexible symmetric supercapacitor device Masoud Faraji1 · Rezvan Rostami1 Received: 8 April 2020 / Accepted: 12 August 2020 © Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract A conceptually simple route has been designed for the preparation of flexible plate by utilization of biodegradable cellophane film through addition of N aHCO3 powder into structure of Polypyrrole-Multiwalled carbon nanotube-Cellophane (PMC) composite and then by chemical treatment in acidic solution. A homogeneous conductive-porous structure was formed as a O2 (g) evolution. The porous PMC plate result of release of N aHCO3 from the composite bulk in acidic solution as well as C exhibited a specific capacitance of 244 mF cm−2 at a current density of 0.5 mA cm−2 and favorite rate capability. The assembled symmetric supercapacitor device showed a high areal capacitance of 309 mF cm−2 at 2.5 mA cm−2, excellent flexibility and a long cycle lifetime (89% capacitance retention after 5000 cycles). The strategy presented in this work opens a new door for environmentally friendly preparation of flexible-biodegradable supercapacitor devices with high mechanical strength.
1 Introduction In the past decades, remarkable attentions have been given to the development of supercapacitors (SCs) since they have high charge/discharge rates, long-term stability, moderate energy density and wide working temperature range [1–3]. Due to rapid development of high-performance transportable and wearable electronic devices, flexible supercapacitors (FSCs) with high charge/discharge stability under bending, folding and even twisting situations during practical application have been introduced over the last several years [4–6]. FSCs usually contain three main components: separator, electrolyte and flexible electrodes. In general, the separator and electrolyte are usually flexible. Flexible electrodes are often obtained by mixing active capacitive materials with conductive binders and then coating of obtained composites Electronic supplementary material The online version of this article (doi:https://doi.org/10.1007/s10854-020-04241-6) contains supplementary material, which is available to authorized users. * Masoud Faraji [email protected] 1
Electrochemistry Research Laboratory, Department of Physical Chemistry, Chemistry Faculty, Urmia University, Urmia, Iran
onto flexible current collectors such as carbon paper, carbon cloth and metallic foils. The type of capacitive materials and morphology structure play important roles to obtain favorite capacitive activity [7]. Various types of binary/ternary composites including carbon nanomaterials, metal oxides and conductive polymers have been employed for supercapacitor applications [8–10]. Among them, the polypyrrole-carbon nanotube composite has been introduced as a promising electroactive material for FSC electrodes due to its favorite bendability and high electrochemical stability
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