Ionic conductivity enhancement for PVA/ 20wt.% CuSO4 gel polymer electrolyte by using glycerin

Gel polymer electrolyte based on PVA+20wt.%CuSO4 was plasticized with (1,2 and 3) mL glycerin and prepared by casting method. Ionic conductivity for gel electrolytes enhancement occurs primarily as a result of increased carrier concentration and secondarily as a result of increased carrier mobility. Using X-ray diffraction (XRD) characterization, they observed that the glycerin-free electrolyte matrix has a regular arrangement with the crystalline phase. After adding glycerin, the observed orderly organization and crystalline phase fully transformed to amorphous. Fourier transform infrared spectroscopy (FTIR) result shows that the stretching vibration region of the O–H at 3261 cm−1 The hydrogen bonds formed by the hydroxyl groups of both PVA and glycerol structures explanation for the hydrophilic behavior of glycerol and the increased area. The new intense and strong peak that emerged at 2359.62 cm-1 is related to the aromatic Cu-O stretching of the salt CuSO4, The interaction of the PVA with the electrolyte elements increases its intensity with increasing glycerol.