Supercapacitor Performance and Characterization of La Doped V2O5 Nanoparticles

Supercapacitors as energy storage devices and their unique position within the spectrum of energy storage technologies. Lanthanum doped Vanadium oxide nanoparticles was prepared by using co-precipitation method. The Prepared samples were under gone various characterization such as X-Ray Diffraction, UV-vis spectroscopy, Photoluminescence, FT-IR, and SEM. X-Ray Diffraction (XRD) studies confirms the orthorhombic crystal structure of La doped V2O5 nanoparticles. UV-vis spectroscopy estimates as slight increase in band gap (Eg) from 3.28 eV (pure V2O5) to 3.47 eV (La doped V2O5). The Photoluminescence emission inters the increase in oxygen vacancies in La doped V2O5. From the results of FTIR spectra, it was observed that the peaks are shifted from lower to higher wavenumbers (right side) and lies between 555to 680nm. The size of the Pure V2O5 particles is from 41-54nm where the size of the La doped V2O5 Nanoparticle. It is 41-101nm estimated by Sem analysis. The elemental analysis of pure V2O5 nanoparticles predicted the chemical compositions of V and C are about 92.83 % and 7.17 % and in 5% La doped V2O5 nanoparticles the chemical compositions of V, La and C are about to be about 77.19%, 4.50% and 18.31% respectively. CV studies shows that 5% of La doped V2O5 nanoparticles have reached the highest discharge capability of 172.96 F/cm2 in 5mV with a good cyclic reversibility. The GCD studies estimated that obtained the specific capacitance of 5% La doped V2O5 nanoparticles about 119.96 F/g when the discharge current is 0.5 A/g.