A dual aliovalent ion doped NASICON ceramic filler embedded in the PEO–NaTFSI polymer matrix for high-performance solid-state sodium-ion batteries

Demonstrating a high-performance all-solid-state sodium-ion battery system, with a maximum discharge capacity of ∼105 mA h g −1 at 0.1C, achieved for NVP symmetric cells enabled via polymer–ceramic composite electrodes and electrolytes.