Fast Lithium Ion Conduction in Lithium Phosphidoaluminates
T. M. F. Restle, Ch. Sedlmeier, H. Kirchhain, W. Klein, G. Raudaschl-Sieber, V. L. Deringer, L. van Wüllen, H. A. Gasteiger, T. F. Fässler
Angew. Chem. Int. Ed. 2020

https://doi.org/10.1002/ange.201914613

Fast lithium ion conduction at very low density: Solid electrolyte materials are crucial for the development of high‐energy‐density all‐solid‐state batteries (ASSB) using a nonflammable electrolyte. The new material Li₉AlP₄ combines a high lithium content and a high ionic mobility of 3 mS cm^-1 at 25 °C  with a very low theoretical density of 1.703 g·cm^-1. The new compound is available by a simple ball milling synthesis from the elements and subsequent annealing.