Focused on enabling high-energy-density solid-state batteries, this research addresses the optimization of high-voltage Lithium Nickel Manganese Oxide (LNMO) cathodes operating up to 5 V. To replace non-conductive conventional binders like PVDF, functional single-ion conducting polymer binders were investigated, highlighting the copolymer P(MTFSILi-co-AN), which exhibited superior anodic stability and lower resistivity.
In sum, the inclusion of nitrile functionality in the P(MTFSILi-co-AN) binder improved voltage stability, binding strength, and cathode morphology. Cathodes formulated with this binder demonstrated high discharge capacities and excellent reversibility, establishing a key benchmark for 5 V solid-state lithium metal battery design.