Recent Advances of LATP and Their NASICON Structure as a Solid‐State Electrolyte for Lithium‐Ion Batteries

The organic electrolyte in commercial liquid lithium‐ion batteries is volatile, prone to low‐temperature failure, has a declining safety performance at high temperatures, and is susceptible to serious side reactions with electrodes. The current research hotspots are solid‐state electrolytes with high energy densities and high safety performance. The next‐generation lithium metal solid‐state battery electrolyte is expected to be Li 1+ x Al x Ti 2− x (PO 4 ) 3 (LATP) with a sodium superionic conductor structure due to its high ionic conductivity, high energy density, and good stability in air. In this article, a review of the crystal structure of LATP, lithium‐ion diffusion channels, synthesis methods, factors affecting high ionic conductivity, and regulation and application of interfacial stability is presented. This effectively addresses the problems of LATP in current applications and facilitates the promotion of all‐solid‐state batteries in future applications.