Page 12 - Book of Abstracts 2020

th
8 Biannual Conference on Chemistry - CHEM 08

Development of Efficient Cobalt Hydroxide Nanoparticle

Modified Graphite Felts for Supercapacitor Applications
Ahmed M. Abdelrahim*, Muhammad G. Abd El-Moghny, Mohamed
E. El-Shakre, Mohamed S. El-Deab

Chemistry Department, Faculty of Science, Cairo University, Cairo 12613,
Egypt.
Email: amabdelrahim@sci.cu.edu.eg

ABSTRACT

In this study, cobalt hydroxide nanoparticles are electrodeposited onto
high surface area graphite felt (GF), in the presence of several additives,
and has been proposed as a positive electrode for supercapacitor

applications. Three films were prepared (A1, A2 and A3) from different
deposition baths (additive-free, chlorate- or iodate-containing baths,
respectively). The various films were characterized employing SEM, EDX,

XPS, XRD and contact angle measurements. Film A3 (prepared in the
presence of iodate) showed the best performance as a positive electrode in
supercapacitor applications as evident from the relevant electrochemical

measurements. Additionally, this film is the best among the investigated
-1
films in terms of specific capacitance (567.6 F g at current density 5
2
mA/cm ) which is ratentiend at 82% at high current density of
30 mA/cm indicating the excellent rate capability of this film. The
2
observed high performance could be attributed to the simultaneous
-
generation of OH with high rate during iodate reduction enabling better
distribution of Co(OH)2 throughout the GF matrix.

Keywords: Cobalt hydroxide film, Energy storage, Iodate-additives, Porous
carbon, Supercapacitors.

BOOK OF ABSTRACTS CHEM 08 (2020) Page 11