Abstract
Cobalt nanoparticles were deposited on multi-wall carbon nanotubes (CNT) and graphene oxide (GO) carbon supports and evaluated as a potential supercapacitor electrodes. The structure and morphology of the cobalt nanoparticles deposited on carbon supports were studied using XRD, TGA, and Raman spectroscopy. Cyclic voltammetry was used to measure the electrical charge of the electrode based on the materials and their specific capacitance (Csp) were calculated. GO based electrode showed a higher Csp than CNT electrode which is attributed to a larger surface area of the GO carbon support. Interestingly, the deposition of Co nanoparticles promoted an enhanced Csp in the both GO and multi-wall CNT supports.
Highlights
Energy demand has always been a primary area of interest around the world and its claim has grown very fast in recent years
We propose the use of graphene oxide (GO) and carbon nanotubes (CNT) modified deposited with Co nanoparticles in order to obtain a non-expensive and efficient material for SCs
The deposition of Co nanoparticles was performed by reverse microemulsion method which starts with the preparation of a microemulsion solution of isopropanol/CTAB/ H2O (56 mL/2 g/4 mL). 40 mL of microemulsion solution were taken in order to disperse the support under sonication
Summary
Energy demand has always been a primary area of interest around the world and its claim has grown very fast in recent years. The bulk of energy storage research has been focused on two types of electrochemical devices: batteries and capacitors. Supercapacitors (SCs) are efficient devices that have exceeded the energy storage capacity with respect to conventional capacitors. The SCs have great advantages including their high-power density, long service life, wide operating temperature range, flexibility, and their ecofriendly nature. Some applications for these devices are in areas like consumption electronic, hybrid vehicles, and industrial power/energy managements [2]. (GO) and multi-wall carbon nanotubes (CNT) can provide a synergistic effect on capacitance and thereby energy density and the deposition of nanoparticles is expected to increase this synergic effect.
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