This work demonstrates a new sodium-ion conductor for solid-state sodium-ion (SSSB) batteries that is stable when incorporated into higher-voltage oxide cathodes. A SSSB comprising a composite cathode, Na3PS4 electrolyte, and Na-Sn anode exhibits an exceptional first-cycle Coulombic efficiency of 97.1% at room temperature and can cycle over 1000 cycles with 89.3% capacity retention at 40 °C. See more details here.

Our work has been highlighted by EurekAlert! under AAAS. Check it out: https://www.eurekalert.org/pub_releases/2021-02/uoc–nmi022221.php