Lithium Sulfide Powder

• High-purity lithium sulfide powder for advanced materials research

• Chemical formula Li₂S with a high theoretical lithium content

• Important precursor for sulfide-based solid-state electrolytes

• Used in lithium-sulfur battery and solid-state battery R&D

• Suitable for synthesis of lithium thiophosphate and other lithium-containing sulfides

• Available in research-grade and high-purity specifications

• Particle-size and impurity specifications may be customized

• Moisture-controlled packaging options may be available

• COA and material documentation available as applicable

Property	Typical Information
Product Name	Lithium Sulfide Powder
Chemical Formula	Li₂S
CAS Number	12136-58-2
Molecular Weight	45.95 g/mol
Lithium Content	~30.4 wt% theoretical
Sulfur Content	~69.6 wt% theoretical
Appearance	White to pale yellow powder; appearance may vary with purity and handling
Crystal Structure	Cubic, antifluorite-type
Density	Approximately 1.66 g/cm³
Melting Point	Approximately 938°C
Solubility	Reacts with water rather than behaving as a stable, inert aqueous solute
Typical Purity	99%–99.99%+, depending on grade
Particle Size	Fine powder; submicron or customized distributions may be available
Moisture Sensitivity	High; reacts with moisture and can release hydrogen sulfide
Packaging	Moisture-protected, tightly sealed packaging appropriate to the grade

• Battery-Grade Lithium Sulfide Powder

• High-Purity Lithium Sulfide Powder

• 99% Lithium Sulfide Powder

• 99.9% Lithium Sulfide Powder

• 99.99% Lithium Sulfide Powder

• Solid-State Electrolyte Precursor Grade

• Research-Grade Lithium Sulfide

• Custom-Specification Lithium Sulfide Powder

1. What is lithium sulfide powder used for?

Lithium sulfide powder is primarily used in advanced battery research, solid-state electrolyte synthesis, lithium-sulfur batteries, electrochemical materials development, and specialty inorganic chemistry.

2. Why is lithium sulfide important for solid-state batteries?

Li₂S is a key starting material for many sulfide-based solid electrolytes. It can be combined with other sulfide compounds, such as phosphorus sulfides, to produce lithium-ion-conducting materials for solid-state battery systems.

3. What purity levels are available?

Potential specifications include 99%, 99.9%, and 99.99% purity. For battery applications, buyers should also specify relevant impurities, moisture, oxygen content, and trace-metal limits rather than relying on the headline purity alone.

4. Is lithium sulfide sensitive to moisture?

Yes. Lithium sulfide reacts with water and moisture and may release toxic, flammable hydrogen sulfide gas. It requires suitable moisture-controlled handling, sealed packaging, and appropriate workplace safety procedures.

5. Can lithium sulfide powder be supplied with a controlled particle size?

Particle-size requirements may be specified for research and synthesis applications. Confirm the requested particle-size distribution, measurement method, and any agglomeration limits with the supplier.

6. Can REG Metals source lithium sulfide powder for battery research?

REG Metals can source lithium sulfide powder subject to availability and the requested specification. Buyers should provide the required purity, moisture and oxygen limits, particle size, quantity, packaging requirements, and intended application.