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Enhanced electrochemical performance of lanthanum ferrite decorated reduced graphene oxide nanocomposite electrodes prepared by in situ microwave irradiation for energy storage applications
Author(s) -
Sivakumar Natarajan,
Nagaraju Perumal,
Alsalme Ali,
Alghamdi Abdulaziz,
Jayavel Ramasamy
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6146
Subject(s) - graphene , materials science , nanocomposite , oxide , supercapacitor , raman spectroscopy , chemical engineering , nanoparticle , electrochemistry , capacitance , ferrite (magnet) , electrode , orthorhombic crystal system , lanthanum , nanotechnology , composite material , inorganic chemistry , crystal structure , chemistry , metallurgy , crystallography , physics , engineering , optics
Summary Lanthanum ferrite decorated reduced graphene oxide (LaFeO3/rGO) nanocomposite is prepared by in‐situ microwave irradiation method. The X‐ray diffraction study reveals the single phase orthorhombic structure of LaFeO 3 nanoparticles and LaFeO 3 /rGO nanocomposites. The FTIR study reveals various vibrational modes and the characteristic D and G bands of the Raman spectrum confirms the formation of reduced graphene oxide. The SEM and HR‐TEM images demonstrate that spherical LaFeO 3 particles are decorated on 2D graphene sheets. From the HR‐TEM study, the average particle size of LaFeO 3 is estimated to be 23 nm. The synergistic effect of 3D LaFeO 3 nanoparticles and 2D graphene layers offers more active sites to achieve the enhanced electrochemical performance. The specific capacitance of LaFeO 3 /rGO composites is measured to be 170 Fg −1 at 10 mV s −1 . The composite electrode has admirable cyclic stability, better Columbic efficiency and improved capacitance retention with great potential for supercapacitor applications.

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