Fast Li+-conducting Zr4+-based oxychloride electrolyte with good thermal and solvent stability

Li2ZrCl6 with a trigonal structure is low-cost Li+-conducting chloride electrolyte, which stable at high voltages up to 4.2 V and compatible high-voltage cathodes. However, its relatively low room-temperature ionic conductivity, poor stability in different solvents temperatures limit application for next-generation all-solid-state batteries. Herein, we prepared new oxychloride electrolytes molar ratios of Li2O, ZrCl4, LiCl, replacing Cl− O2− anion optimize the electrolyte performance. The results showed that increasing Li2O content reduced crystallization degree induced monoclinic electrolyte. general formula Li2.22Zr1.11Cl5.33O0.67 had conductivity above 10−3 S cm−1. Moreover, introducing considerably increased thermal solvent Good enable cycling Li-In/LiCoO2