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Springer Science and Business Media LLC Scientific Reports 14(1)
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    초록·키워드

    Perovskite oxide materials, specifically MgTiO<sub>3</sub> (MT) and Li-doped MgTiO<sub>3</sub> (MTxLi), were synthesized via a sol-gel method and calcination at 800 °C. This study explores the impact of varying Li doping levels (x = 0, 0.01, 0.05, and 0.1) on the crystalline structure and properties of MgTiO<sub>3</sub>. X-ray diffraction analysis revealed a well-defined rhombohedral MgTiO<sub>3</sub> phase. Optical diffuse reflectance measurements provided insights into energy gap values, refractive index, and dielectric constant. Li<sup>+</sup> doping enhanced the electrical properties of MgTiO<sub>3</sub>, with a notable phase transition observed at 50 °C. The study investigated impedance and AC conductivity under varying temperature and frequency conditions (25-120 °C, 4 Hz to 8 MHz). Electrochemical analysis through cyclic voltammetry and electrochemical impedance spectroscopy confirmed highly electrocatalytic properties for MTxLi, particularly when modified onto screen-printed electrodes. This work not only advances the understanding of Li-doped MgTiO<sub>3</sub> nanostructures but also highlights their significant potential for direct electrochemical applications, particularly in the realm of energy storage.

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