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Nanomat 2019
Nano Research & Applications
ISSN: 2471-9838
Page 30
January 28-29, 2019
Barcelona, Spain
18
th
Edition of International Conference on
Emerging Trends in
Materials Science and
Nanotechnology
S
upercapacitor devices are of keen interest because of their high
energy density and quick charging and discharging potential
among other energy storage systems. Of the materials used in
this storage system, polyaniline is known for its monotical charge
delivery over discharging potential window. In this work, dedoped
polyaniline (dPANI) was modified with 30%, 32%, 34% and 40%
ammonium cobalt phosphate (ACP) denoted as dPANI-ACP for
improved capacitance performance in 1 M KOH. Results from FTIR
studies shows that there is bond between nitrogen of dPANI and
cobalt in ACP as confirmed by reduction in intensity of vibration
frequency of C–N bond of dPANI-ACP compared to unmodified
PANI as well as shift in vibration band of O–P–Ostr to high
frequency which is seen as an overlap and a doublet at 806–810
cm-1 on the composites. SEM images, HR-TEM and SAED images
show the dPANI as an amorphous strand with good porosity, the
ACP as stacked flat crystalline sheets and the dPANI-ACPs as
ACP embedded in the PANI strands. This is corroborated by the
SAED images in which a regular electron pattern from the ACP
crystal is embedded on the characteristic amorphous ring of the
dPANI. Specific capacitance (C¬sp) (Fig 1) of the dPANI and dPANI-
ACPs from cyclic voltammetry indicated the value of 0.24 Fg-1
for dPANI and 3.61, 0.58, 9.13, 3.67 Fg-1 for 30%, 32%, 36%, 40%
dPANI-ACP respectively at 10 mV/s scan rate. Impedance studies
corroborated the C¬sp values as the highest phase angle value of
73.6ᶿ (90ᶿ for ideal capacitor) was obtained for the 32% dPANI-ACP.
In conclusion, a modified form of dPANI with good capacitance
and ion exchange potential in 1 MKOH has been produced. Further
studies like cycling stability and charging-discharging profile of the
material is on-going.
Biography
Temitope E Bakare is a Lecturer at Caleb University, Lagos. He holds aMaster’s
degree in Inorganic Chemistry from University of Ibadan, Nigeria. He is a win-
ner of Caleb University capacity development fund and a member of research
team awarded a grant by Lagos State Research and Development Council
(LRDC) on Environmental Quality Improvements Incident upon Lagos State
Urbanization Programme - Projecting outcome of Urbanization Regeneration.
He has co-authored three papers. He is currently a PhD student at the Universi-
ty of Kwazulu-Natal, South Africa under the supervision of Professor Werner E
van Zyl, Chair of the Sustainable Water, Energy and Biomass (SUSWEB) group
at the School of Chemistry and Physics, University of Kwazulu-Natal, South
Africa.
baktemitope@gmail.comDedoped polyaniline/ammonium cobalt
phosphate (ACP) hybrid supercapacitor
Temitope E Bakare
and
Werner E van Zyl
University of Kwazulu-Natal, South Africa
Temitope E Bakare et al., Nano Res Appl 2019, Volume 5
DOI: 10.21767/2471-9838-C1-031