Abstract
This article presents the effect of nickel as dopant on the structural, morphological, and capacitance behaviors of SrTiO3 for supercapacitor application. Pure and Ni-doped SrTiO3 was synthesized via ball milling method. The phase structure and purity of the synthesized samples were confirmed by powder X-ray diffraction (XRD). The surface morphology showed the role of dopants in fixing the grain size of SrTiO3. The electrochemical performance of pure and Ni-doped SrTiO3 was investigated using cyclic voltammetry (CV) and Galvanostatic charge–discharge (GCD) in a 3-M KOH electrolyte solution. It was found that Ni-doped SrTiO3 exhibited the maximum specific capacity of 142 F/g at 1 A/g, which was significantly higher than that of pure SrTiO3 (105 F/g at 1 A/g). Electrochemical impedance spectroscopy (EIS) evidenced that there is the smallest charge transport resistance value for Ni-doped SrTiO3 sample.
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Priyadharsini, C.I., Marimuthu, G., Pazhanivel, T. et al. Electrochemical supercapacitor studies of Ni2+-doped SrTiO3 nanoparticles by a ball milling method. Ionics 26, 3591–3597 (2020). https://doi.org/10.1007/s11581-019-03412-8
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DOI: https://doi.org/10.1007/s11581-019-03412-8