Li halogen oxides/LLZO solid-state cathodes for high-energy-density Li-garnet solid-state batteries

Solid-state batteries based on Li-garnet Li7La3Zr2O12 (LLZO) electrolyte have seen rapid advances in recent years. These systems are poised to address the urgent need for safe, non-flammable, and temperature-tolerant energy storage batteries that concomitantly possess improved energy densities and the cycle life. Moreover, LLZO provides the fundamental basis for the exploration of new cathodes, which have never been envisioned for employment in conventional Li-ion batteries due to solubility issues. In this context, this project proposes a set of experiments that will advance the development of Li-garnet solid-state batteries by focusing on the unexplored family of cathode materials based on Li halogen oxides, LiXOn (X=Cl, Br, I; 1 ≤ n ≤ 4). The scientific impact of the project is seen as a comprehensive assessment of the chemical and electrochemical compatibility of LLZO with LiXOn using Synchrotron X-ray powder diffraction.