Cobalt-iron spinel/reduced graphene oxide composite material for supercapacitor applications

2021 ◽  
Vol 717 (1) ◽  
pp. 60-71
Author(s):  
M. A. Hodlevska ◽  
R. I. Zapukhlyak ◽  
V. M. Boychuk ◽  
V. O. Kotsyubynsky ◽  
A. I. Kachmar ◽  
...  
Keyword(s):  
Composite Material ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Oxide Composite ◽  
Reduced Graphene ◽  
Cobalt Iron ◽  
Oxide Composite Material ◽  
Supercapacitor Applications

scholarly journals Electrophysical and Morphological Properties of a Hydrothermally Synthesized CuFe2O4 and CuFe2O4 / Reduced Graphene Oxide Composite

2021 ◽  
Vol 22 (2) ◽  
pp. 372-379
Author(s):  
V.O. Kotsyubynsky ◽  
V.M. Boychuk ◽  
R.I. Zapukhlyak ◽  
M.A. Hodlevskyi ◽  
I.M. Budzulyak ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Composite Material ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Morphological Properties ◽  
Copper Ferrite ◽  
Spectroscopy Data ◽  
Oxide Composite ◽  
Reduced Graphene ◽  
Transfer Mechanisms

The aim of this paper is to compare the structural, morphological and electrical properties of the CuFe2O4 and CuFe2O4 / reduced graphene oxide composite. XRD and Mossbauer studies have shown that joint hydrothermal synthesis of cubic copper ferrite and reduction of graphene oxide leads to a decrease in ferrite particles from 14 to 8 nm. Based on the impedance spectroscopy data, a model of the obtained composite material has been prepared as a system consisting of contacting spinel particles covered with rGO clusters and separated by porous rGO. For CuFe2O4 / rGO composite material, the predominance of hopping charge transfer mechanisms has been shown, and the activation energies of electrical conductivity of grains and grain boundaries have been calculated.

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