Solid polymer electrolytes based on starch as a polymer host and Magnesium Sulphate
(MgSO4) as an ionic dopant were successfully prepared by a single-solvent via solution casting
technique. As determined by XRD and FTIR analyses, the solid polymer electrolyte films
were in amorphous phase and the coexistence of peaks of the materials (starch and MgSO4)
confirming that the complex films were successfully obtained. The SEM observations showed
the films appeared to be rough and flat shape of surface. The highest ionic conductivity (σ)
of 8.52 ×10−5 S cm−1 was achieved at room temperature (303K) for the sample containing 35
wt.% MgSO4. The presented results revealed that the as-prepared solid polymer electrolyte
has the potential as dual functional compound in electrochemical storage application.