Structural, Optical, Morphological and Electrical Properties of Cu doped Calcium Stannate Nanoparticles for Electrochemical Performance

In this work, co precipitation method was adopted to synthesis Cu (0.01M, 0.02M, and 0.03M) doped CaSnO3 nanoparticles and the structural, optical, morphological and electrochemical characterization were studied using XRD, FTIR, UV–Visible, Photoluminescence, SEM and Cyclic voltammetry with Electrochemical impedance analysis. It is noticed from XRD patterns that the peaks shift towards higher angles attributed to the substitution of Cu2+ ions for Ca2+ ions, and confirms the orthorhombic structure of Cu2+ doped CaSnO3. The average crystallite size is found between 40 – 49 nm for Cu doping. FTIR analysis boosts the confirmation of Cu doping in to the CaSnO3 nanoparticles by the presence of vibrational peaks at 698 cm-1, 622 cm-1, and 581 cm-1 due to Cu-O stretching and the peak 483 cm-1 due to Sn-O stretching vibration. The calculated band gap values are 4.7 eV, 4.8 eV, and 4.9 eV for Cu doping. The PL emission study showed light emission towards the visible region. SEM analysis proved well-formed cubed particles about < 2µm. Specific capacitance values are highest for 0.02 M Cu doped CaSnO3 at about 1694F/g, compared to 572 F/g, 922 F/g, and 1626 F/g for pure, 0.01 M, and 0.03 M Cu doped CaSnO3 particles, respectively, at a scan rate of 10 mV/s. Overall, these findings indicate that 0.02 M and 0.03 M Cu doped CaSnO3 are promising candidates for energy storage applications.