Lithium Sulfide (Li₂S, CAS No. 12136-58-2) is a high-purity lithium-containing inorganic sulfide material and a key precursor widely used in solid-state batteries, lithium–sulfur batteries, electrolyte materials, energy storage research, and advanced materials development. Lithium sulfide is considered one of the most important sulfur-containing lithium compounds because it provides both lithium and sulfur sources for next-generation battery technologies.
With its high theoretical sulfur content and compatibility with sulfide-based solid electrolytes, Li₂S plays a critical role in the development of all-solid-state lithium batteries, particularly sulfur-based cathode systems and sulfide electrolyte synthesis. It is also investigated as a precursor for lithium-containing ceramics, functional materials, and electrochemical applications.
| Property | Value |
|---|---|
| Chemical Name | Lithium Sulfide |
| Synonyms | Lithium Sulphide; Dilithium Sulfide; Li₂S |
| CAS Number | 12136-58-2 |
| Molecular Formula | Li₂S |
| Molecular Weight | 45.95 g/mol |
| Appearance | White to yellow powder |
| Crystal Structure | Cubic (anti-fluorite type) |
| Melting Point | >900°C |
| Density | Approximately 1.66 g/cm³ |
| Sensitivity | Moisture sensitive |
Lithium Sulfide possesses several properties that make it valuable for advanced energy materials:
Lithium Sulfide is a critical sulfur-containing material for the development of next-generation lithium–sulfur batteries.
Typical applications include:
Li₂S can serve as a sulfur source and lithium source in sulfur-based cathode systems, helping overcome challenges associated with elemental sulfur cathodes.
Lithium Sulfide is widely investigated as a precursor for sulfide-based solid electrolytes used in all-solid-state lithium batteries.
Typical applications include:
Common sulfide electrolytes, such as lithium phosphorus sulfide materials and related glass-ceramic systems, often utilize Li₂S as a starting material.
Li₂S is an essential raw material in preparing lithium-ion conducting sulfide ceramics.
Typical applications include:
Lithium Sulfide is used as a model compound for studying lithium–sulfur chemistry and sulfur conversion reactions.
Typical applications include:
Li₂S is also used as a precursor in the preparation of sulfur-containing inorganic materials.
Typical applications include:
| Parameter | Recommended Conditions |
|---|---|
| Storage Temperature | Room temperature or 2–8°C according to supplier specification |
| Atmosphere | Dry inert atmosphere recommended |
| Moisture Protection | Required |
| Handling Environment | Glove box recommended for battery research |
| Solvents | Anhydrous solvents only |
Lithium sulfide is moisture sensitive and can generate hazardous gases when exposed to water or acidic conditions; appropriate precautions are required.
Lithium Sulfide is mainly used as a precursor for lithium–sulfur batteries and sulfide solid electrolytes, as well as in advanced inorganic materials research.
Li₂S provides both lithium and sulfur sources required for synthesizing sulfide-based solid electrolytes, which are important materials for high-performance all-solid-state lithium batteries.
Li₂S participates in sulfur conversion chemistry and can be used as an active sulfur-containing material or precursor for sulfur cathode development.
Yes. Li₂S is one of the primary starting materials for preparing sulfide-based lithium-ion conducting electrolytes.
Lithium Sulfide should be stored in a dry environment, protected from moisture and air exposure. For battery material research, handling inside an inert atmosphere glove box is recommended.
Yes. High-purity Li₂S is widely used in battery research, especially for lithium–sulfur batteries and all-solid-state lithium batteries.
Yes. This product is supplied for laboratory research, battery material development, analytical studies, and industrial R&D applications only.
