In this work, cornstarch-based electrolytes are doped with ammonium bromide (NH4Br) and plasticized with glycerol. Starch-NH4Br complexation is evidenced from the Fourier transform infrared (FTIR) spectroscopy results. A room temperature conductivity of (5.57±1.88)×10 S cm obtained by 70wt% starch–30 wt% NH4Br electrolyte is enhanced to (1.80±0.26)×10 S cm with the addition of 30 wt% glycerol. ...