Ion transport and structural design of lithium-ion conductive solid polymer electrolytes: a perspective

Abstract Solid polymer electrolytes (SPEs) possess several merits including no leakage, ease in process, and suppressing lithium dendrites growth. These features are beneficial for improving the cycle life safety performance of rechargeable metal batteries (LMBs), as compared to conventional non-aqueous liquid electrolytes. Particularly, superior elasticity polymeric material enables employment SPEs building ultra-thin flexible batteries, which could further expand application scenarios high-energy LMBs. In this perspective, recent progresses on ion transport mechanism structural designs electrolyte components (e.g. conductive salts, matrices) scrutinized. addition, key achievements field single lithium-ion also outlined, aiming provide status quo those with high selectivity cationic transport. Finally, possible strategies their LMBs discussed.