Flexible symmetric and asymmetric supercapacitors based in nanocomposites of carbon cloth/polyaniline - carbon nanotubes
| Autor: | Marcela Alejandra Bavio, Teresita Kessler, Arnaldo Visintin, Gerardo G. Acosta |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Recubrimientos y Películas 020209 energy chemistry.chemical_element Nanotechnology 02 engineering and technology Carbon nanotube INGENIERÍAS Y TECNOLOGÍAS ASYMMETRIC Industrial and Manufacturing Engineering law.invention chemistry.chemical_compound law Ingeniería de los Materiales Polyaniline 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering Ingeniería Eléctrica Ingeniería Electrónica e Ingeniería de la Información Civil and Structural Engineering Ingeniería de Sistemas y Comunicaciones Mechanical Engineering Building and Construction SYMMETRIC Pollution General Energy chemistry FLEXIBLE SUPERCAPACITORS Humanities Carbon ENERGY STORAGE |
| Popis: | This paper describes the construction of flexible symmetric and asymmetric supercapacitors made of carbon cloth, polyaniline and carbon nanotubes. The electrode materials (nanostructures of polyaniline-carbon nanotubes, PANI-CNT) were supported on carbon cloth acting as current collector. PANI-CNT nanostructures were synthesized through an oxidative polymerization process in the monomer (aniline) acid solution with the presence of a surfactant and the addition of multi-walled CNT. The CNT were used with and without pretreatment. The cells electrolyte was H2SO4 0.5 M and the selected potential range was 1 V. In order to test their behavior, the different cells configurations were evaluated by electrochemical techniques. Polyaniline nanostructures and polyaniline-carbon nanotubes nanocomposites were used to make the negative and/or positive electrodes of the cell. The cathode in the asymmetric supercapacitors was always carbon cloth/carbon black. The behavior of the arrayed supercapacitors was evaluated by cyclic voltammetry, between 0.0 and 1.0 V at different scan rates (10–100 mVs−1), as well as with galvanostatic charge/discharge runs at current densities between 0.3 and 6.7 mAcm−2. At a constant current density of 0.3 mA cm−2, a specific capacitance value of 1275 Fg−1 was obtained for a symmetric assembly using both electrodes prepared with polyaniline and carbon nanotubes nanocomposites. When the set was asymmetric, being the positive electrode made of polyaniline and carbon nanotubes nanocomposites, the specific capacitance value was 1566 Fg−1. For the latter array, the specific power and energy density values were 125 Wkg−1 and 217 Whkg−1 at 0.25 Ag−1, and 2502 Wkg−1 and 71 Whkg−1 at 5.0 Ag−1. These results suggest a good energy transfer capacity. Moreover, symmetric and asymmetric supercapacitors demonstrated a high stability over 1000 cycles obtaining a capacitance retention of more than 85%. Fil: Bavio, Marcela Alejandra. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina Fil: Acosta, Gerardo Gabriel. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. - Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ingeniería Olavarría. Departamento de Electromecánica. Grupo INTELYMEC; Argentina Fil: Kessler, Teresita. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ingeniería Olavarría; Argentina Fil: Visintin, Arnaldo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentina |
| Databáze: | OpenAIRE |
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