LPSC (Li6PS5Cl) Sheet (100*80 mm) as Solid-State Electrolyte for Lithium-Ion Battery, 1 pcs/pack, CLIBSSESLPCS

Li6PS5Cl (LPSC), belonging to the lithium argyrodite family of sulfide solid electrolytes (SSEs), is one of the most promising solid-state electrolyte materials for high-energy-density All-Solid-State Lithium Batteries (ASSLBs). It features exceptionally high room-temperature ionic conductivity (~ 10^{-3} to 10^{-2) S/cm, favorable mechanical softness (which aids in cold-sintering and interfacial contact), and good compatibility with lithium metal anodes compared to oxide-based counterparts.

To manufacture thin, pinhole-free, and mechanically robust solid electrolyte sheets for scalable pouch or planar cell assembly, two primary fabrication routes are used: Slurry Tape Casting and Dry Powder Pressing/Extrusion. (1) Slurry Tape Casting (Wet Method): Tape casting is preferred for producing large-area, thin electrolyte sheets (typically ~20-50 um thick) compatible with industrial roll-to-roll processing. (i) Slurry Preparation: Inside an argon-filled glovebox, combine the LPCS powder, binder, and non-polar solvent in a vial or planetary mixer. Ball-mill or vortex the slurry to ensure homogeneous distribution. (ii) Doctor Blade Coating: Cast the prepared slurry onto a release liner (e.g., fluoropolymer-coated PET or aluminum foil) using a doctor blade coater with adjustable gap height. (iii) Drying: Evaporate the solvent in a controlled, dry environment or vacuum chamber at mild temperatures (40-60 °C) to yield a flexible, self-standing green electrolyte tape. (iv) Calendering: Pass the dried sheet through a roll press or warm press to increase density and eliminate internal micro-pores, maximizing ionic conductivity. (2) Solvent-Free Dry Film Processing: To avoid binder-solvent interactions or residual solvent traps, dry-film manufacturing is increasingly adopted. LPCS powder mixed with a small fraction (1-3 wt%) of high-molecular-weight fibrous binder (such as PTFE powder). Mechanically knead or fibrillate the powder mixture to create a spider-web-like binder matrix, then roll-mill or calendar the composite directly into a self-standing solid electrolyte membrane.

Notes: Please try to store the LPSC sheet in glovebox before use. 

References: 

1. C. Yu, et al. Facile Synthesis toward the Optimal Structure-Conductivity Characteristics of the Argyrodite Li6PS5Cl Solid-State Electrolyte, ACS Appl. Mater. Interfaces 2018, 10, 39, 33296–33306.
2. D. H. S. Tan, et al. Elucidating Reversible Electrochemical Redox of Li6PS5Cl Solid Electrolyte, ACS Energy Lett. 2019, 4, 10, 2418–2427.