The addition of different plasticizers to polymer electrolytes for batteries can significantly affect the ionic conductivity of the electrolyte. Plasticizers are low molecular weight additives that are incorporated into the polymer matrix to improve the flexibility, processability, and overall performance of the electrolyte. They can influence the ionic conductivity through several mechanisms:1. Segmental motion enhancement: Plasticizers can increase the segmental motion of the polymer chains by reducing the intermolecular forces and increasing the free volume. This enhanced segmental motion facilitates the movement of ions through the polymer matrix, leading to higher ionic conductivity.2. Solvation of ions: Plasticizers can solvate the ions in the electrolyte, reducing the ion-ion interactions and promoting ion dissociation. This results in an increased number of mobile ions, which in turn increases the ionic conductivity.3. Formation of ion-conducting channels: Some plasticizers can form ion-conducting channels within the polymer matrix, providing pathways for the ions to move more easily. This can lead to a significant improvement in the ionic conductivity.4. Dielectric constant modulation: The dielectric constant of the plasticizer can influence the ionic conductivity by affecting the ion-polymer and ion-ion interactions. A higher dielectric constant can promote ion dissociation and improve the ionic conductivity.The effect of different plasticizers on the ionic conductivity of polymer electrolytes depends on their chemical structure, molecular weight, and compatibility with the polymer matrix. Some common plasticizers used in polymer electrolytes include ethylene carbonate EC , propylene carbonate PC , dimethyl carbonate DMC , and diethyl carbonate DEC . Each plasticizer can have a different impact on the ionic conductivity, and the optimal choice depends on the specific requirements of the battery application.In summary, the addition of different plasticizers can significantly affect the ionic conductivity of polymer electrolytes for batteries by enhancing segmental motion, solvating ions, forming ion-conducting channels, and modulating the dielectric constant. The choice of plasticizer depends on the desired properties and performance requirements of the electrolyte in the battery application.