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Abstract
In present work, microrod structured La2O3 thin films are grown on to the stainless steel substrate using a binder free single step hydrothermal method. The structural, morphological and active surface area properties of La2O3 thin film are studied by scanning electron microscope (SEM), X-ray diffraction (XRD), contact angle, X-ray photoelectron spectroscopy (XPS), Fourier transformation spectroscopy (FT-IR), and Brunauer-Emmer-Teller (BET) techniques. The La2O3 thin film electrode showed the maximum specific capacitance of 250 F g−1 at a scan rate of 5 mV s−1 with an excellent cycling performance (81%) up to 1000 cycles. The La2O3 thin film electrode shows maximum specific energy and specific power of 80 Wh kg−1 and 1.5 kW kg−1, respectively. The symmetric solid state supercapacitor devices (SSSD) with La2O3 thin film have been fabricated using gel electrolyte (PVA-LiClO4).
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