Sodium-Ion-Conducting Polymer Nanocomposite Electrolyte of TiO2/PEO/PAN Complexed with NaPF6

TL;DR

This study develops a sodium-ion-conducting polymer nanocomposite electrolyte with TiO2 nanofiller, demonstrating enhanced ionic conductivity and electrochemical stability suitable for solid-state battery applications.

Contribution

It introduces a novel PEO/PAN-based nanocomposite electrolyte with TiO2 nanofiller, showing improved conductivity and stability over existing materials.

Findings

Maximum conductivity of ~10^-3 S/cm with 15% TiO2 filler

Electrochemical window of ~6V suitable for device use

Homogeneous surface confirmed by FESEM and FTIR analysis

Abstract

A free standing transparent film of solid state polymer electrolyte based on PEO/PAN + NaPF6 with different compositions of nano sized TiO2 in weight percent (x = 0, 1, 2, 5, 10, 15, 20 ) is synthesized by using standard solution cast technique. The homogeneous surface of above polymer composition is examined by FESEM. The microscopic interaction among polymer, salt and nanoceramic filler has been analyzed by Fourier Transformed Infra-Red (FTIR) spectroscopy. The reduction of ion pair formation in polymeric separator is clearly observed on addition of nanofiller in the polymer salt complex film. Electrical conductivity has been recorded of the prepared polymeric separator which is of the order of ~10-3 Scm-1 after addition of nanofiller (15% wt/wt) which support the FTIR results. Electrochemical potential window has been observed of the order of ~6V by the cyclic voltammetry results. The observed data of the prepared separator are at par with the desirable value for device applications.