CENTRO DE INVESTIGACIONES EN FISICA E INGENIERIA DEL CENTRO DE LA PROVINCIA DE BUENOS AIRES
Unidad Ejecutora - UE
Polyaniline and polyaniline-carbon black nanostructures as electrochemical capacitor electrode materials
BAVIO, MARCELA; ACOSTA, GERARDO G.; KESSLER, TERESITA
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
PERGAMON-ELSEVIER SCIENCE LTD
Lugar: Amsterdam; Año: 2014 vol. 39 p. 8582 - 8582
Polyaniline (PANI) and polyaniline-carbon black (PANI-CB) nanostructures were developed and their behavior in relation to supercapacitors properties was tested. Different nanostructures were prepared by a simple chemical method of self-organization. SEM and TEM images revealed PANI nanotubes of ca. 95 nm in diameter; nanoparticles, nanobelts, nanosheets and/or nanotubes could be recognized in PANI-CB nanocomposites as a result of the use of CB particles with and without chemical pretreatment, CBf and CBnf, respectively. From EDS, XRD, UVeVis and FTIR characterization techniques, the development of the various nanostructures was attributed to the chemical polymerization process that provoked a doped PANI state and hydrogen links that stabilized the changes in the structures. The resulted morphologies influenced the capacitance, specificpower and specific energy values.PANI-CBf nanocomposites displayed improved capacitive properties in H2SO4 solutions, namely 1486 F g1 at 2 A g1. The chargeedischarge tests indicated that the loss of capacitance during the charge/discharge cycles was lower than 18% for the checked materials.