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• W4281659105 endingPage "109615" @default.
• W4281659105 startingPage "109615" @default.
• W4281659105 abstract "Metal oxide electrode material plays a vital role, particularly in supercapacitor applications and energy storage devices. The present study broadly focuses on the comparative research of the super-capacitive performance of hafnium oxide (HfO2) and sulfonated hafnium oxide (S-HfO2) nanomaterials. The simple precipitation technique has been used to synthesize HfO2 nanoparticles. Subsequently, sulfuric acid (H2SO4) has been used to functionalize the obtained HfO2 nanoparticles. Afterward, the crystalline phases and orientation of nanoparticles has been analyzed using X-Ray diffraction (XRD), the presence of functional group and possible vibration frequency of the material can be identified by Fourier transform infrared (FT-IR) spectroscopy, crystal structures, and lattice imperfections of the synthesis material were found by High-resolution transmission electron microscope (HR-TEM). Consequently, the nanoparticles' structure, thickness, and elemental composition have been analyzed using the Field-Emission scanning electron microscope (FE-SEM) and Energy Dispersive X-ray spectroscopy (EDS) techniques. To gain the knowledge of supercapacitor behavior of prepared nanomaterial, electrochemical properties, and ion transfer characteristics were investigated by various experiments, namely, the cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD). Moreover, the internal resistances of the material (HfO2 and S-HfO2) were analyzed using Electrochemical Impedance Spectroscopy (EIS) technique. Both the nanoparticles showed a good improvement in specific capacitance. The supercapacitor values were measured for HfO2 and S-HfO2 electrodes, which exhibit a specific capacitance value 126.0 Fg−1 and 210.0 Fg-,1 respectively, at the scan rate of 5 mVs−1. Hence, it is noted that Sulfonated HfO2 nanoparticle enhances the specific capacitance and is used as a promising substance for the energy storage device. Besides, this finding benefits the new researchers in developing different kinds of sulfonated metal oxide nanomaterials for energy applications." @default.
• W4281659105 created "2022-06-13" @default.
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• W4281659105 date "2022-07-01" @default.
• W4281659105 modified "2023-10-06" @default.
• W4281659105 title "Synthesis and characterization of sulfonated hafnium oxide nanoparticles for energy storage devices" @default.
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• W4281659105 doi "https://doi.org/10.1016/j.inoche.2022.109615" @default.
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