Improving the ionic conductivity of polymer electrolytes for batteries while maintaining stability and durability can be achieved through several approaches:1. Optimization of polymer structure: Designing polymers with a high concentration of polar groups, such as ether or ester groups, can enhance the solvation of ions and facilitate ion transport. Additionally, creating polymers with a flexible backbone can improve segmental motion, which is crucial for ionic conductivity.2. Incorporation of inorganic fillers: Adding inorganic fillers, such as nano-sized ceramic particles or metal-organic frameworks MOFs , can improve the ionic conductivity of polymer electrolytes. These fillers can create new pathways for ion transport and enhance the mechanical properties of the electrolyte, leading to improved stability and durability.3. Use of plasticizers: Incorporating plasticizers into the polymer electrolyte can increase the free volume and enhance the segmental motion of the polymer chains, resulting in improved ionic conductivity. However, the choice of plasticizer is crucial, as it should not compromise the mechanical properties or electrochemical stability of the electrolyte.4. Design of block copolymers: Block copolymers with both conductive and mechanically robust segments can be synthesized to achieve a balance between ionic conductivity and mechanical stability. The conductive segments can facilitate ion transport, while the mechanically robust segments can provide the necessary mechanical strength and durability.5. Crosslinking: Crosslinking the polymer electrolyte can improve its mechanical properties and dimensional stability, which can be beneficial for maintaining durability. However, the degree of crosslinking should be optimized to avoid hindering the segmental motion of the polymer chains, which is essential for ionic conductivity.6. Optimization of salt concentration: The concentration of the salt in the polymer electrolyte can significantly influence the ionic conductivity. A higher salt concentration can increase the number of charge carriers, but it can also lead to ion aggregation and reduced conductivity. Therefore, an optimal salt concentration should be determined to achieve the best balance between these factors.7. Use of ionic liquids: Incorporating ionic liquids into the polymer electrolyte can improve the ionic conductivity by providing additional charge carriers and enhancing the solvation of ions. Moreover, ionic liquids can improve the thermal and electrochemical stability of the electrolyte.In summary, improving the ionic conductivity of polymer electrolytes for batteries while maintaining stability and durability requires a combination of approaches, including polymer design, incorporation of additives, and optimization of salt concentration. These strategies should be tailored to the specific requirements of the battery application to achieve the best performance.