Synthesis and electrochemical performance evaluation of La doped TiO2/reduced graphene oxide nanocomposites for supercapacitor application

Lanthanum (La) doped titania (TiO2)/reduced graphene oxide (RGO) nanocomposites with varying amounts of lanthanum have been synthesized as promising electrode materials for supercapacitors. TiO2/RGO, 0.5 wt% La doped TiO2/RGO, 1 wt% La doped TiO2/RGO, and 2 wt% La doped TiO2/RGO nanocomposites are synthesized using the facile hydrothermal method. The prepared nanocomposites were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, and energy dispersive spectroscopy. The effect of the increasing amount of lanthanum as a dopant on the electrochemical performance of nanocom-posites has been studied. The 2 wt% La doped TiO2/RGO composite exhibits the highest specific capacitance of 117.6F/g at 10 mV s-1 and also shows better supercapacitive behavior in terms of cyclic stability (91.42 % after 10,000 cycles), energy density, and power density as compared to other nanocomposites.

Automated summary

Lanthanum (La) doped titania (TiO2)/reduced graphene oxide (RGO) nanocomposites with varying amounts of lanthanum were synthesized as electrode materials for supercapacitors. The nanocomposites were characterized and the effect of lanthanum doping on their electrochemical performance was studied. The 2 wt% La doped TiO2/RGO composite demonstrated the highest specific capacitance of 117.6 F/g at 10 mV/s, as well as better cyclic stability, energy density, and power density compared to other nanocomposites.