Improving the conductivity of polymer electrolytes for better battery performance can be achieved through several approaches:1. Optimizing polymer structure: Designing polymers with high segmental mobility and flexible chains can enhance the ionic conductivity. This can be done by incorporating ether groups, such as poly ethylene oxide PEO , which is a widely studied polymer electrolyte.2. Blending polymers: Combining two or more polymers with complementary properties can result in a blend that exhibits improved conductivity. For example, blending PEO with other polymers like poly vinylidene fluoride PVDF or poly methyl methacrylate PMMA can enhance the overall ionic conductivity.3. Incorporating nanofillers: Adding inorganic nanofillers, such as metal oxides, silica, or clay, can improve the conductivity of polymer electrolytes. These nanofillers can create new pathways for ion transport and enhance the mechanical properties of the electrolyte.4. Using ionic liquids: Incorporating ionic liquids into polymer electrolytes can increase the ionic conductivity by providing additional charge carriers. Ionic liquids have low volatility and high thermal stability, which can also improve the overall performance of the battery.5. Salt concentration optimization: The concentration of the lithium salt in the polymer electrolyte can significantly affect its conductivity. An optimal salt concentration should be determined to maximize the number of charge carriers without compromising the mechanical properties of the electrolyte.6. Crosslinking: Crosslinking the polymer chains can improve the mechanical properties of the electrolyte, which can help maintain good contact between the electrolyte and the electrodes. However, excessive crosslinking may reduce the segmental mobility of the polymer chains and decrease the ionic conductivity.7. Copolymerization: Designing copolymers with tailored structures can help improve the ionic conductivity. For example, block copolymers with alternating hydrophilic and hydrophobic segments can self-assemble into nanostructures that facilitate ion transport.By employing these strategies, the conductivity of polymer electrolytes can be improved, leading to better battery performance in terms of energy density, power density, and cycle life.