Revisiting lithium aluminium titanium phosphate chemistry: Unveiling advancements for all-solid-state batteries

Solid-state batteries (SSBs) will become indispensable for electronics and technological advancements. Currently, lithium-ion batteries (LIBs) utilize liquid electrolytes, leading to shorting and damaging the device. Solid-state electrolytes (SSEs) are advantageous due to their excellent chemical stability when in contact with the electrode materials, exceptional thermal and electrochemical stability window in the operation of SSBs, and they can diminish the use of a separator. The quest for safer electrolytes paved the way for developing phosphate-based electrolytes. Lithium Aluminium Titanium Phosphate (LATP) is favorable for scaling up to cell-level configurations on an industrial scale due to the low cost of raw materials, reasonable air and chemical stability, and outstanding electrochemical performance. This review traverses to the structure and conduction mechanisms of LATP after introducing and comparing various synthesis methods. The review also sheds light on the LATP-polymer composite electrolytes for improved ionic conductivity and manufacturability.