High Purity Solid electrolytes material Lithium Sulfide 99.9% for batteries or as a cathode material in lithium-sulfur batteries

Advantages of High Purity Lithium Sulfide(Li2S) 99.9%

Lithium sulfide (Li₂S) is a key functional material in the development of next-generation all-solid-state batteries (ASSBs). As a solid electrolyte or a critical component in sulfur-based cathodes, it primarily serves to enable high-energy-density and enhanced-safety energy storage.

Its core functions and applications include:

1.Solid Electrolyte/Precursor: Li₂S can be processed into sulfide-based solid electrolytes (e.g., Li₂S–P₂S₅ glasses or Li₃PS₄-type argyrodites), which exhibit high ionic conductivity (up to 10⁻² S·cm⁻¹ at room temperature), negligible electronic conductivity, and good mechanical deformability. This facilitates stable lithium-ion transport while suppressing dendrite growth.

2.Cathode Active Material: In sulfur-based all-solid-state batteries, Li₂S serves as a lithium-source cathode material paired with lithium-metal anodes. It delivers a high theoretical capacity of 1166 mAh·g⁻¹ and operates without the formation of soluble polysulfides—a common issue in liquid electrolyte systems—thus minimizing capacity fade and shuttle effects.

3.Interface Stabilizer: When integrated into composite cathodes, Li₂S helps form stable interphases with sulfide solid electrolytes, reducing interfacial resistance and improving cycling stability.

4.Enabler for Lithium-Metal Anodes: By replacing flammable liquid electrolytes, Li₂S-based solid electrolytes allow the safe use of lithium-metal anodes, pushing battery energy density beyond 500 Wh·kg⁻¹.

Key advantages of Li₂S in solid-state batteries include:

• Enhanced Safety: Non-flammable and eliminates leakage risks.
• High Energy Density: Enables Li–S chemistry with theoretical specific energy >2500 Wh·kg⁻¹.
• Extended Cycle Life: Inhibits polysulfide dissolution and electrode degradation.

Current research focuses on optimizing Li₂S-electrolyte interfaces, scaling up synthesis, and reducing production costs for commercial applications in electric vehicles and grid storage.