Site-Occupation-Tuned Superionic Li x ScCl 3+ x Halide Solid Electrolytes for All-Solid-State Batteries

The enabling of high energy density of all-solid-state lithium batteries (ASSLBs) requires the development of highly Li+-conductive solid-state electrolytes (SSEs) with good chemical and electrochemical stability. Recently, halide SSEs based on different material design principles have opened new opportunities for ASSLBs. Here, we discovered a series of LixScCl3+x SSEs (x = 2.5, 3, 3.5, and 4) based on the cubic close-packed anion sublattice with room-temperature ionic conductivities up to 3 × 10–3 S cm–1. Owing to the low eutectic temperature between LiCl and ScCl3, LixScCl3+x SSEs can be synthesized by a simple co-melting strategy. Preferred orientation is observed for all the samples. The influence of the…

• NS
  National Science Foundation

  Award: 1550423
• CF
  Canada Foundation for Innovation
• CR
  Canada Research Chairs
• WU
  Western University
• M
  Mitacs
• NS
  Natural Sciences and Engineering Research Council of Canada