Introduction of Al(III)-Ion-Based Solid Polymer Electrolyte Material for Energy Storage Device Applications

Solid phase electrolyte system PVIm-R-PEG-AlCl3 is introduced for Al(III) ion-based energy storage material. Here, we introduced [AlCl3Br](-) counter anion system with N-octyl-polyvinyl imidazolium polymer matrix supported by PEG. Electrolyte material shows good thermal stability with a Glass transition temperature (Tg similar to 148 degrees C), which provides a good working temperature range for material processing. PVIm-R-PEG-AlCl3 shows electrochemical stability of 1.5 V and redox properties, it has 96% of ionic conduction against the Al metal. The conductivity of electrolyte material is found in the range of 10(-5) S/cm at room temperatures and 10(-4) S/cm at higher temperature (>40 degrees C). The polymer electrolyte matrix shows the mobility of 1.37x10(-6) m(2)/Vs and drift ionic velocity of 3.42x10(-4) m/s at 30 degrees C. The ionic movement of Al(III) ions inside the matrix follows correlated type hopping with the activation energy of 0.266 eV. This Al(III) ion-based solid polymer electrolyte (SPE) is associated with a large amount of capacitance with a tiny electrode contribution.