Optimized nano-perovskite lanthanum cuprate decorated PVA based solid polymer electrolyte

Solid polymeric electrolytes (SPEs) based on PVA/2wt% La2CuO4 with 5, 10 and 15 wt% of LiClO4 have been fabricated via solution intercalation technique. TEM result indicates that the size of nanoparticles (NPs) lies in the range 91-134 nm. The morphological behavior of PVA-SPEs probed by SEM; where the roughness of SPE films increased with increase in LiClO4 contents. The structural behaviors of SPEs have been elucidated by XRD, while ion-dipole interactions between components were evaluated by FTIR. The optical properties of SPEs investigated by UV-visible spectroscopy, where the outcomes showed increased refractive index from 1.74 to 2.41, whereas the band gap energy (E-g) is reduced from 5.26 to 3.32e V for PVA and PVA/2wt% La2CuO4 /15wt%LiClO4, respectively. Electrical properties of the SPEs evaluated using LCR-meter at room temperature in frequency range 50 Hz-5 MHz. The ac-conductivity (sigma(ac)) strongly depends on frequency and LiClO4 contents in SPEs and the maximum sigma(ac) achieved is 2.82X10(-5) Scm(-1) for 15wt% LiClO4 doped PVA/La2CuO4 film. The current-voltage (I-V) data indicated non-ohmic behaviors at higher potential voltage region (> 6 V) and dc-conductivity (sigma(dc)) increased with increase in dosage of LiClO4 in SPEs through hopping ions mechanism. Thermal properties of the SPEs have been evaluated using DSC and TGA. The reduction in T-g of flexible SPEs with increase in LiClO4 content was observed due to amorphous portion dominates in SPEs. [Graphics]