Enhanced performance in a NASICON-incorporated solid polymer electrolyte

In the present work, a novel ‘doped ceramic-polymer composite’-based solid polymer electrolytes (SPEs) has been synthesized using Zr (LAZTP) and Nb (LANbTP)-doped LATP as a ceramic filler and polyacrylonitrile (PAN) as a host polymer via the solution cast method. A series of SPEs with different ceramic loadings ranging from 10, 20, 30, 40, and 80 wt. % have been investigated using XRD, SEM, and impedance analysis. XRD spectra show the presence of crystalline ceramic peaks in composite solid polymer electrolyte. Further, the homogeneous distribution of the filler has been confirmed by SEM images. For SPEs, the highest conductivity of 5.31 × 10⁻⁵ S cm⁻¹ has been obtained for PAN + LANbTP30 at room temperature. Whereas, the optimized conductivity for LATP-incorporated PAN shows 1.79 × 10⁻⁵ S cm⁻¹, and the LAZTP-incorporated sample shows a conductivity of 3.03 × 10⁻⁵ S cm⁻¹ at room temperature. Also, LANbTP-contained SPE shows excellent voltage stability of 4.90 V w.r.t. pure PAN.