NaSICON: A promising solid electrolyte for solid‐state sodium batteries

A surge of interest has been brought to all-solid-state batteries (ASSBs) as they show great prospects for enabling higher energy density and improved safety compared conventional liquid batteries. Na Super Ionic CONductors (NaSICONs) proposed by Goodenough Hong in 1976 are the most promising materials class Na-based ASSBs owing their excellent ion conductivity (>1 mS cm−1), high thermal chemical/electrochemical stability, well good compatibility with electrode materials. The major challenge facing NaSICON-type electrolytes is generally interfacial resistance thus sluggish charge transfer kinetics across NaSICON/cathode interface. Great endeavors past few years have led progress improvement ion-conducting property, a dramatic decrease NaSICON/electrode interface resistance. Excellent cycling performance rate capability achieved through engineering. In this review article, we summarize state-of-the-art findings various derivatives NaSICON structured solid electrolytes, aim providing deeper understanding underlying mechanism conductivity, intrinsic reasons enhanced kinetics. These strategies can be readily extended other electrolytes. We hope will inspire more work on solid-state