@Article{PoliHilGamBalGon:2019:InHeTr,
author = "Poli, Anne Karoline dos Santos and Hil{\'a}rio, Rodrigo Barbosa
and Gama, Adriana Medeiros and Baldan, Maur{\'{\i}}cio Ribeiro
and Gon{\c{c}}alves, Emerson Sarmento",
affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Instituto de Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Tecnol{\'o}gico de Aeron{\'a}utica (ITA)}",
title = "Influence of heat treatment temperature of carbon fiber felt
substrate on polyaniline electrosynthesis and its properties",
journal = "Journal of Solid State Electrochemistry",
year = "2019",
volume = "23",
number = "1",
pages = "33--52",
month = "Jan.",
keywords = "Carbon fiber felt, Heat treatment, Polyaniline, Electrosynthesis,
Structure, EIS.",
abstract = "Polyaniline was electrosynthesized using three voltammetric cycles
on carbon fiber felts annealed at 1400, 1600, 2000, and 2300K.
Felts and composites was characterized by scanning electron
microscopy, X-ray diffraction, Raman and Fourier transform
infrared spectroscopy, and electrochemical impedance spectroscopy.
Annealing temperatures increasing provides more crystalline felts.
The increase of capacitance is due to presence of functional
groups that attract a lot of charge to double layer. Capacitance
found for felts treated in 1400K is larger compared to felts
treated in 2300K. The functional groups presence on annealed felts
at lower temperature implies polyaniline growth in several
orientations and regions, evidenced by the high heteroatoms ratios
which decrease with increasing annealing temperature. Therefore,
for higher temperatures, the polyaniline growth occurs at several
additional orientations. The polyaniline oxidation degree was
close to emeraldine allowing mobile charge presence.
Electrochemical impedance spectroscopy confirmed that as
temperature decreases, resistance of inner and outer double layer
decreases. To 1600K annealing, polyaniline showed an increase in
inner double layer capacitance which can be confirmed by lower
ratio between bipolarons and polarons. The tendency to increase
energy and power density is most prominent for polyaniline at
2300K felt.",
doi = "10.1007/s10008-018-4107-8",
url = "http://dx.doi.org/10.1007/s10008-018-4107-8",
issn = "1432-8488",
language = "en",
targetfile = "poli_influence.pdf",
urlaccessdate = "03 jun. 2024"
}