Ionic and Electronic Conductivities of Lithium Argyrodite Li₆PS₅Cl Electrolytes Prepared via Wet Milling and Post-Annealing.

ABSTRACT: Lithium argyrodite Li₆PS₅Cl powders are synthesized from Li₂S, P₂S₅, and LiCl via wet milling and post-annealing at 500°C for 4 h. Organic solvents such as hexane, heptane, toluene, and xylene are used during the wet milling process. The phase evolution, powder morphology, and electrochemical properties of the wet-milled Li₆PS₅Cl powders and electrolytes are studied. Compared to dry milling, the processing time is significantly reduced via wet milling. The nature of the solvent does not affect the ionic conductivity significantly; however, the electronic conductivity changes noticeably. The study indicates that xylene and toluene can be used for the wet milling to synthesize Li₆PS₅Cl electrolyte powder with low electronic and comparable ionic conductivities. The all-solid-state cell with the xylene-processed Li₆PS₅Cl electrolyte exhibits the highest discharge capacity of 192.4 mAh·g^-1 and a Coulombic efficiency of 81.3% for the first discharge cycle.

SUBMITTER: Lee JM 

PROVIDER: S-EPMC8717468 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature