Abstract: The composite of ceria has been widely studied as an electrode material for supercapacitors
applications due to its high energy density. Herein, we synthesize CeO2/NiO nanocomposite via
a hydrothermal route and explore its different aspects using various characterization techniques.
The crystal structure is investigated using X-ray diffraction, Fourier transform infrared, and Raman spectroscopy. The formation of nanoflakes which combine to form flower-like morphology is
observed from scanning electron microscope images. Selected area scans confirm the presence of
all elements in accordance with their stoichiometric amount and thus authenticate the elemental
purity. Polycrystalline nature with crystallite size 8–10 nm having truncated octahedron shape is
confirmed from tunneling electron microscope images. Using X-ray photoelectron spectroscopy
the different oxidation states of Ce and Ni are observed which play the role of active sites in the
electrochemical performance of this nanocomposite material. Cyclic Voltammetry(CV) measurements
at different scan rates and Galvanic Charge Discharge (GCD) measurements at different current densities are performed to probe the electrochemical response which revealed the potential of CeO2/NiO
nanocomposite as an electrode material for energy storage devices.
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