Reversible phase transformation-type electrolyte based on layered shape polyoxometalate

Reversible phase transformation-type electrolyte, consisting of 1-(3-sulfonic group) propyl-3-methyl imidazolium cation (MIMPS) and tungstovanadophosphoric anion with Keggin structure, [MIMPS](4)PW11VO40, is synthesized and characterized using elemental analysis, IR, UV, XRD, and TG-DTA. This product is in quasi-solid-state, a novel type of ionic liquid, with a layered type of structure. This compound can process the phase transition from a crystal phase to an isotropic phase below 100 degrees C. Moreover, the DTA and conductivity-temperature plot shows an observable increase in conductivity above 84.2 degrees C, which is caused by the phase transformation from crystal phase to isotropic phase. This novel electrolyte material exhibits high conductivity (8.60 x 10(-2) S cm(-1) at 83 degrees C and 80% relative humidity). In the range of the measured temperature, its conductivity increases with higher temperature, indicating that the conductive activation energy for this conduction step is 42.06 kJ mol(-1).