In the current scenario, conventional liquid electrolyte batteries are the most accepted electrochemical storage devices in terms of cost, reliability, and performance. But one of the major drawbacks of such conventional batteries is the involvement of a flammable organic liquid electrolyte which possesses many safety issues. In comparison, the utilization of solid-state electrolytes (SSEs) in SSBs is much safer, capable of operating with the metal anode, and compatible with the high voltage cathodes as well.

The work aims to develop a sodium-ion conductor for all-solid-state Na-ion batteries. Among all the probable candidates suitable for sodium-ion conductors, NASICON-type electrolytes (NZSP) are the most promising in terms of their higher electrochemical stability, high ionic conductivity (~mS/cm), and wide electrochemical window. But there are still some interfacial and charge-kinetic issues to be resolved pertaining to ASSBs. Different elemental doping strategies are adopted to mitigate these issues related to SSEs and further improve their ion-transport properties.