Super capacitor characteristics of novel rare earth perovskite nanomaterials of Sr0.5, Cu0.4, Y0.1

Abstract

In the present study incorporates inorganic nanocomposites of Sr0.5, Cu0.4 and Y0.1 the nanomaterials were synthesized by co precipitation method. These materials were prepared at low temperature and has better characteristics of super capacitor. The nano-powders were investigated by their initial studies using cyclic voltammetry (CV), scanning electron microscopy (SEM) and XRD (X-ray difractometer), UV-visible spectroscopy and FT-IR (Fourier Transform Infrared) spectroscopy confirmed the ELDS (Electrochemical double layer super capacitor) of the granular morphology of Sr based substrates which increases the high interfacial resistance between the electrode materials. Generally, specific capacitance reduces with increasing in the scan rate having the range in between 10–100 mV s−1. The specific capacitance values also increases with increase in the percentage of doping of the Y to the nano matrix and is measured by galvanostatic charge-discharge methods found to be 35KW/h. The synthesised nanomaterials showed high specific capacitance of the value 208W/h at 1000 mA/g it is almost two times higher than that of MnO2 (163 F/g) and high stability during charge–discharge process indicating it can be used as super capacitor material electrodes. The introduction of the yttrium leads to synergistic improvement in specific capacitance and electrochemical impedance spectrometry (EIS). These composites possesses long cycle life with ∼93% the capacitance of the sample was retained after 3000 cycle test. The present study paves the way for the application of inorganic hybrid nanocomposite materials in super capacitors for energy storage applications