Polymer electrolyte is favored in battery research because of its good flexibility, light weight and preferable interfacial contact. However, their ionic conductivity at room temperature, narrow electrochemical window, and electrode/electrolyte solid-solid interface compatibility are the key issues, which hinders their development for high-performance solid-state batteries (SSBs). By designing and modifying the polymer molecular structure, an integrated solid-state polymer electrolyte was synthesized in situ by free radical thermal initiation polymerization. The structural design of functional polymer electrolytes with high ionic conductivity/low electronic conductivity, high mechanical modulus, self-recovery/adaptive, and chemical/electrochemical stability, is an effective strategy for SSBs. However, the poor contacts at the solid/solid interface, severe volume changes during cycling of electrode materials, and inhibition of lithium dendrite growth are critical factors affecting cycling stability and capacity performance. In addition, the advanced in situ and non-in situ characterization techniques to explore the interfacial properties in depth will facilitate the design of high-performance solid-state polymer electrolytes and promote the development of high-energy-density solid-state battery systems.

Structural design and interfacial regulation of polymer electrolytes for solid-state batteries

ACS Spring Meeting 2021

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.