The study of ion transport parameters using two models in plasticized sodium ion conducting polymer blend electrolytes

In the current work two models has been utilized to determine ion transport parameters. Solid polymer electrolytes (SPEs) are prepared with chitosan (CS), poly(vinyl alcohol) (PVA) for blending, sodium chloride (NaCl) salt, and glycerol with solution cast method by varying the glycerol from (10 to 40) wt%. EIS tests are used to measure the conductivity of ions of the samples and the CSPVNAIG4 system has maximum conductivity of 3.1 x 10(-5) S cm(-1). The systems non-Debye behavior is proved by the depressed semicircles of EIS and asymmetry of tan phi plots. The relaxation time (tau(r)) for the samples are decreased with loading glycerol and the CSPVNAIG4 has the least tau(r) of 2.41 x 10(-6) s. Transport parameters (number density (n), mobility (mu), viscosity (eta), and diffusion coefficient (D) of ions) are measured by two methods (Bandara-Mellander (B.-M.) and EIS) and compared agreeably and it is also consistent with the ions conductivity results. Both dielectric constant and loss (epsilon ' and epsilon '') are high and low at the low- and high-frequency (fr) window, respectively. Ion species are the majority in the CSPVNAIG4 film as measured by TNM.