High-performance solid-state zinc-ion batteries enabled by flexible and highly Zn2+ conductive solid-polymer electrolyte

PVA-inter-PEG 30% /IL 70% SPE not only demonstrates high Zn 2+ conductivity (2.264 mS cm −1 ), high flexibility, and high thermal stability (>200 °C), but also provides wide ESW (up to 2.8 V) and a stable interface to electrodes.