Journal
NANOSCALE
Volume 14, Issue 6, Pages 2266-2276Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1nr06914d
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Funding
- CoordenacAo de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [88887.310585/2018-0]
- FundacAo de Amparo a Pesquisa do Estado do Rio Grande do Sul [Fapergs/PqG 2017 17/2551-0001157-0]
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Brazilian Government FAPESP BEPE
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A flexible supercapacitor with state-of-the-art performance is fabricated using carbon nanotube arrays and polyaniline/polydimethylsiloxane electrodes. The supercapacitor exhibits excellent energy storage properties and mechanical agility performance.
The fabrication of a flexible supercapacitor with state-of-the-art performance is described, based on a facile and low-cost fabrication method that encompasses aligned carbon nanotube arrays (ACNTA)-polyaniline/polydimethylsiloxane electrodes (ACNTA-PANI/PDMS). The ACNTA were partially embedded in PDMS to ensure excellent adhesion and integration whilst PANI was electrodeposited on its surface to improve energy storage properties. The supercapacitor structure and morphology were investigated by Raman spectroscopy and scanning electron microscopy (SEM), respectively. The energy storage properties of the electrodes were evaluated in two and three-electrode configurations. The maximum value of specific capacitance was 408 mF cm(-2) (265 F g(-1)) at 1 mA cm(-2), and a high energy density of 20 mu W h cm(-2) (25.5 W h kg(-1)) was achieved at a power density of 100 mu W cm(-2) (126.6 W kg(-1)) for a symmetric two-electrode device. The device showed a good capacitance retention of 76% after 5000 cycles and was able to maintain 80% of its electrochemical properties while being measured at different bending angles, demonstrating excellent mechanical agility performance under extreme conditions and some of the highest carbon-based energy storage properties.
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