Nano Research & Applications

Electrochemical Capacitive Behaviour of Carbon based and /or NT-CoFe2O4 Nanocomposites

Joint Event on 22^nd International Conference on Advanced Materials and Simulation & 22^nd Edition of International Conference on Nano Engineering & Technology
December 10-12, 2018 Rome, Italy

Aicha Harat

Dr, LEREC Laboratory, Physics Department, Badji Mokhtar-Annaba University, BP.12, Annaba 23000, Algeria O. Guellati, H. Kennaz, and M. Guerioune, LEREC Laboratory, Physics Department, Badji Mokhtar- Annaba University, BP.12, Annaba 23000, AlgeriaN. Manyala, Department of Physics, Institute of Applied Materials, SARCHI Chair in Carbon Technology and Materials, University of Pretoria, Pretoria 0028, South Africa

Posters & Accepted Abstracts: Nano Res Appl

DOI: 10.21767/2471-9838-C7-028

Abstract

Cobalt ferrite nanoparticles CoFe2O4 and their carbon based and /or NT nanocomposites : CoFe2O4-CoCO3 , CoFe2O4- CoCO3/NT have been successfully synthesized by a simple one step hydrothermal method, using NaOH, and urea surfactants. The X-ray diffraction confirms the presence of cobalt ferrite and cobalt ferrite-carbonate phases, the SEM and TEM analyzes reveals the nanosized particles. The electrochemical performances of these products were investigated by cyclic voltammetry, charge– discharge and electrochemical impedance spectroscopy in 6M KOH aqueous electrolyte, in a three-electrode system. A maximum specific capacitances (capacities) of 246 F.g-1 (27 mAh.g-1), 285 F.g-1 (31 mAh.g-1) and 277 F.g-1 (30 mAh.g-1) were obtained respectively for CoFe2O4 , CoFe2O4-CO3 and CoFe2O4-CoCO3/ NT at a current density of 0,5 A/g. The Cobalt ferrite-carbonate shows an excellent capacitance retention of 97,8% after 1000 cycles at a current density of 5A/g. Recent Publications 1. O. Guellati, A. Harat, D. Momodu, J. Dangbegnon, T. Romero, D. Begin, C. Pham-Huu, N. Manyala, M. Guerioune (Electrochemical measurements of 1D/2D/3DNi-Co bi-phase mesoporous nanohybrids synthesized using free-template hydrothermal method) Electrochimica Acta 275 (2018) 155-171, doi: 10.1016/j. electacta.2018.04.112. 2. H. Kennaz, A. Harat, O. Guellati, D. Y. Momodu, F. Barzegar, J. K. Dangbegnon, N. Manyala and M. Guerioune (Synthesis and electrochemical investigation of spinel Cobalt ferrite magnetic nanoparticles for supercapacitor application) Journal of Solid State Electrochemistry 22 (3) (2018), 835-847, https://doi.org/10.1007/s10008- 017-3813-y 3. T. M. Masikhwa, M. J Madito, D. Y Momodu, J. K. Dangbegnon, O. Guellati, A. Harat, M. Guerioune, F. Barzegar, N. Manyala (High performance asymmetric supercapacitor based on CoAl-LDH/GF and activated carbon from expanded graphite) RSC Advances 6 (52), (2016), 46723-46732. 4. Farshad Barzegar, Abdulhakeem Bello, Ouanassa Guellati, Damilola Y. Momodu, Aicha Harat, Julien K. Dangbegnon, Mohamed Guerioune, Ncholu Manyala, (Effect of addition of different carbon materials on hydrogel derived carbon material for high performance electrochemical capacitors) Electrochimica Acta 186 (2015), 277-284. 5. F Chouit, O Guellati, S Boukhezar, A Harat, M Guerioune, N Badi (Synthesis and characterization of HDPE/N-MWNT nanocomposite films) Nanoscale research letters 9 (1), (2014) 1.

Biography

Dr. Aicha Harat is a teacher-researcher and head of a team research on LEREC laboratory (University of Annaba, Algeria). Her principal research topic is magnetic and high Tc superconducting materials. Now she deals with magnetic nanoparticles and their carbon based nanocomposites synthesized by various methods (co-precipitation, hydrothermal, combustion…) and their application in supercapacitors for energy storage. (orcid.org/0000- 0002-1748-9290 )

E-mail: harat_aicha@yahoo.fr / aicha.harat@univ-annaba.dz