Molecular Tailoring of Succinonitrile Reshapes Na+ Solvation and Interfacial Chemistry in High-Voltage Solid-State Polymer Electrolytes for Sodium Metal Batteries.
Solid-state polymer electrolytes based on poly(ethylene oxide) are pivotal for high-safety, high-energy-density sodium metal batteries, yet suffer from inadequate room-temperature ionic conductivity and unstable electrode interfaces. Here, molecular tailoring of succinonitrile yields a novel plasticizer (SGa) featuring...