Wet chemical synthesis and electrochemical performance of novel double perovskite Y2CuMnO6 nanocrystallites

We report facile chemical synthesis of novel double perovskite Y2CuMnO6 nanocrystallites by a wet chemical sol gel process. The formation of Y2CuMnO6 has been confirmed by X-ray diffraction, Raman spectrum analysis and X-ray photoelectron spectroscopy. The Y2CuMnO6 exhibited monoclinic structure with P2(1)/n symmetry; lattice parameters being a = 5.2977 angstrom, b = 5.7561 angstrom, c = 7.5823 angstrom, and beta = 89.8766 degrees. The Raman spectrum revealed modes at 649 cm(-1), 436 cm(-1), 350 cm(-1), 326 cm(-1) for symmetry Ag, and at 616.04 cm(-1) and 513.5 cm(-1) for symmetry Bg corresponding to monoclinic P2(1)/n space group. The X-ray photoelectron spectra exhibited presence of Y3+, Cu2+ and Mn4+ species at the surface of the Y2CuMnO6. The specific capacitance similar to 15.6 F g(-1), energy density similar to 0.43 W h/kg, and power density similar to 56.2 W/kg were obtained at the current density of 0.2 A/g. Further, Y2CuMnO6 nano-crystallites electrode has shown the specific capacitance retentivity of similar to 75% for 1000 cycles.