Enhancing Ionic Conductivity and Interface Compatibility in Li₃YBr₆ for Solid-State Lithium Batteries by Structural Modifications

Authors: Mario Reyes, Jack Simonson

SUNY Campus: Stony Brook University

Presentation Type: Poster

Location: Old Union Hall

Presentation #: 34

Timeslot: Session C 1:45-2:45 PM

Abstract: We present an exploration of the potential of La as a substitute for Y in Li3YBr6, which is known for high ionic conductivity and potential application in solid-state Li batteries. However, it was necessary to determine whether Li3LaBr6 exists, as it has not been reported. We attempted to grow single crystals from near-eutectic salt solutions while performing in situ measurements using a custom-built differential thermal analysis instrument. We observed under optical microscope resulting crystals that grow in plate-like and rod-like habits. We determined the lattice parameters of these crystals using a benchtop single crystal x-ray diffractometer. Based on our data, we conclude that Li3LaBr6 either does not exist or is not thermodynamically stable at temperatures near the eutectic melting point. We also discuss similar experiments with Y and Gd and the implications of alternative synthetic routes.