Magnesium ion conducting PVB-based polymer electrolyte for solid-state magnesium batteries

Polymer electrolytes have attained prominence as a compelling paradigm in the realm of battery applications, heralding a new era of advanced energy storage systems. Considering the advantages and recent advancements, the primary objective of this investigation was directed towards formulating a solid-state polymer electrolyte film for magnesium-ion conducting batteries by employing solution-cast method with Polyvinyl Butyral (PVB) polymer doped with MgCl2 6H2O. The incorporation of MgCl2 6H2O into the PVB matrix induces discernible changes in structural characteristics, significant modification of the electronic band structure, and thermal stability in the resulting polymer electrolyte films. The optimized composition PVB:MgCl2 6H2O (70:30) demonstrates a moderate ionic conductivity of 1.8983 x 10-6 S/cm at ambient temperature, highlighting its potential for efficient ion conduction and charge transport. Electrochemical cell analysis under a constant 100 k omega load reveals an open circuit voltage of 2.3 V and a short circuit current of 1.3 mu A.