Effect of Eu3+ on the Structural, Magnetic and Mössbauer Spectroscopy Studies of Copper Ferrite

Angadi, V. Jagadeesha; Yahia, Ibrahim S.; Zahran, H. Y.; Oliveira, Márcia Rozenfeld Gomes de; Longo, E.; Кубрин, С. П.; S.O, Manjunatha; Ribeiro, Rosane Aparecida; Ghozza, M. H.

doi:10.1016/j.jmmm.2022.169789

Cited by 10 publications

(1 citation statement)

References 55 publications

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“…Recently, spinel ferrite nanomaterials (SFNs) such as LiFe 2 O 4 [ 9 ], CoFe 2 O 4 [ 10 , 11 , 12 ], NiFe 2 O 4 [ 13 , 14 , 15 ], and CuFe 2 O 4 have been reported as better electrode materials for ASCs because of their superior electrochemical performance. CuFe 2 O 4 (Cu-ferrite) is considered as a better material for energy storage application because of its unique valence shell electronic configuration (3d 10 4s 1 ), higher theoretical capacity (895 mAh/g), and relatively low cost due to the abundance of Cu and Fe [ 16 , 17 , 18 , 19 ]. Its performance can be further enhanced by combining it with carbonaceous material leading to hybrid electrode configurations.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Mesoporous Carbon/Copper Ferrite Electrode for Asymmetric Supercapacitors

Huynh,

Maddipudi,

Shende

2023

Nanomaterials

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Asymmetric supercapacitors (ASCs) with two dissimilar electrodes are known to exhibit relatively moderate energy and power densities. If electrodes derived from earth-abundant materials or renewable resources such as lignocellulosic biomass (LCB) are used for fabrication, energy storage systems are expected to become less expensive and more sustainable. Hybrid electrode materials have advantages such as higher surface area, better chemical stability, and superior energy density. This study reports on the synthesis of a novel hybrid electrode material containing porous carbon (POC) and copper ferrite, which is designated as POC@Cu-ferrite, and its electrochemical performance in ASC configuration. Corn stover derived hydrochar is utilized for the sol–gel synthesis of POC@Cu-ferrite hybrid material using earth-abundant Cu and Fe-based precursors. This material is characterized using X-ray diffraction (XRD), Raman spectroscopy, Brunauer–Emmett–Teller (BET) surface area analyzer, and scanning and transmission electron microscopy (SEM/TEM). As-synthesized Cu-ferrite is found to contain 89.2% CuFe2O4 and 10.8% Fe2O3, whereas other phases such as Fe3O4, CuFeO2, and CuO are observed for the POC@Cu-ferrite. BET-specific surface area (SSA) and pore volume of POC@Cu-ferrite are observed as 1068 m2/g and 0.72 cm3/g, respectively. POC@Cu-ferrite hybrid electrode is used with POC opposite electrode to fabricate ASC, which is tested using Gamry G-300 potentiostat/galvanostat/ZRA to obtain cyclic voltammetry (CV) profiles and galvanostatic charge–discharge (GCD) plots. ASC is also prepared using Cu-ferrite and POC materials and its specific capacitance and stability are compared with ASCs prepared with POC@Cu-ferrite and POC or graphene nanoplatelets (GNPs) electrodes. POC@Cu-ferrite hybrid electrode is found to be superior with a 2-fold higher capacitance and significant electrochemical stability over 100 GCD cycles as compared to the Cu-ferrite electrode.

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