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<p>Ytterbium tellurite (YbTeO<sub>6</sub>) was synthesized by hydrothermal process. The particles were spherical like tiny beads. Particle size was 105&#xa0;nm. It showed amorphous nature. It can be used as ultraviolet filters and useful in optoelectronic applications. Optical studies confirmed the presence of native point defects, and surface defects with 4.13&#xa0;eV energy gap, 0.309&#xa0;eV urbach energy and 1.549 refractive index. Finger print region confirmed the presence Yb in oxide matrix. Magnetic behavior of YbTeO<sub>6</sub>, revealed phase transition between 50 and 120&#xa0;K. At 300&#xa0;K, it showed feeble ferromagnetic behavior. Half-cell cyclic voltammogram exhibited pseudo-capacitor behavior in potassium hydroxide electrolyte having good symmetry with 0.8&#xa0;V potential window and 149.66 F/g specific capacitance. Chraonopotentiometry delivered 134.13 F/g at current density 1A/g. Full-cell symmetric supercapacitor device using ytterbium tellurite electrode exhibited 76.73 F/g, specific capacitance, 13.64 Wh/kg energy density and high 800 W/kg power density at 1 A/g. The cyclic stability was 96.7% after 10,000 cycles. Asymmetric supercapacitor device with positive ytterbium tellurite electrode and negative activated carbon electrode exhibited specific capacitance of 88.36 F/g, energy density of 49.09 Wh/kg, and power density of 1000 W/kg at 1 A/g. It showed 80% retention and good columbic efficiency after 10,000 cycles. In applications of energy storage, the current research created a fresh avenue in order to produce new materials with high storage capacity energy and suggested a flexible, asymmetric supercapacitor with higher performance.</p> Graphical abstract <p></p>

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Probing ytterbium tellurite (YbTeO6) electrode for high energy and power density supercapacitors

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • S. Shanmugha Soundare,
  • S. Ariponnammal,
  • M. Arivanandhan,
  • R. Jayavel

摘要

Ytterbium tellurite (YbTeO6) was synthesized by hydrothermal process. The particles were spherical like tiny beads. Particle size was 105 nm. It showed amorphous nature. It can be used as ultraviolet filters and useful in optoelectronic applications. Optical studies confirmed the presence of native point defects, and surface defects with 4.13 eV energy gap, 0.309 eV urbach energy and 1.549 refractive index. Finger print region confirmed the presence Yb in oxide matrix. Magnetic behavior of YbTeO6, revealed phase transition between 50 and 120 K. At 300 K, it showed feeble ferromagnetic behavior. Half-cell cyclic voltammogram exhibited pseudo-capacitor behavior in potassium hydroxide electrolyte having good symmetry with 0.8 V potential window and 149.66 F/g specific capacitance. Chraonopotentiometry delivered 134.13 F/g at current density 1A/g. Full-cell symmetric supercapacitor device using ytterbium tellurite electrode exhibited 76.73 F/g, specific capacitance, 13.64 Wh/kg energy density and high 800 W/kg power density at 1 A/g. The cyclic stability was 96.7% after 10,000 cycles. Asymmetric supercapacitor device with positive ytterbium tellurite electrode and negative activated carbon electrode exhibited specific capacitance of 88.36 F/g, energy density of 49.09 Wh/kg, and power density of 1000 W/kg at 1 A/g. It showed 80% retention and good columbic efficiency after 10,000 cycles. In applications of energy storage, the current research created a fresh avenue in order to produce new materials with high storage capacity energy and suggested a flexible, asymmetric supercapacitor with higher performance.

Graphical abstract