Multifunctional composite solid electrolyte enabling dendrite-free lithium metal batteries with enhanced ion transport and stable interfacial chemistry.

A zinc ion-exchanged zeolite is introduced into a polyvinylidene fluoride electrolyte, which achieves a high ionic conductivity at 25 °C and plays a multifunctional role in lithium metal batteries. A symmetric cell and NCM811 full cell with this multifunctional composite solid electrolyte exhibit excellent cycling stability at 25 °C.