High-Purity Lithium Sulfide (Li₂S) Powder for Sulfide Solid Electrolyte Synthesis
SKU: XN-Li2S
High-Purity Lithium Sulfide (Li₂S) Powder — battery-grade precursor for sulfide solid electrolyte synthesis (LPSC, LGPS, Li₃PS₄). >99.9% purity, fine particle size (D₅₀ = 1.7 μm), ultra-low moisture (<50 ppm). Available in 200 g / 1 kg / 5 kg / 25 kg pack sizes for R&D to pilot-scale production.
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Name: High-Purity Lithium Sulfide (Li₂S) Powder for Sulfide Solid Electrolyte Synthesis
Material Form: White powder
Product Code: XN-Li2S
Description:
Lithium sulfide (Li₂S) is a critical and irreplaceable raw material for the synthesis of sulfide-based solid electrolytes such as Li₆PS₅Cl (LPSC), Li₁₀GeP₂S₁₂ (LGPS), and Li₃PS₄. As a result, Li₂S purity directly determines the achievable upper limit of ionic conductivity, target phase formation, and electrochemical performance in finished sulfide electrolytes. Xnergy’s battery-grade Li₂S powder delivers >99.9% purity with stringent impurity control, supporting reproducible solid electrolyte synthesis from laboratory R&D to pilot-scale production.
Left: XRD pattern of Xnergy Li₂S powder vs reference PDF 00-023-0369. Right: SEM image showing fine, uniform particle morphology at 10 μm scale.
Application:
This material serves as a high-purity precursor for synthesizing sulfide solid-state electrolytes including LPSC argyrodite, LGPS, Li₃PS₄, and emerging sulfide chemistries. Furthermore, it is also used in lithium-sulfur (Li-S) battery research, sulfur-based composite cathodes, and pre-lithiation studies.
Specifications:
| Property | Specification | Test Method |
|---|---|---|
| Purity | Li₂S > 99.9% | ICP |
| Appearance | White powder | Visual |
| Particle Size | D₅₀ = 1.7 μm; D₉₀ = 6.4 μm | Laser diffraction |
| Blue Light Whiteness | > 90% | Blue light whiteness meter |
| Moisture Content | < 50 ppm | Karl Fischer titration |
| Bulk Density | 0.34 g/cm³ | — |
| Package | 200 g / 1 kg / 5 kg / 25 kg | — |
| Storage | Argon-packaged, vacuum-sealed; store in glovebox | — |
Impurity Profile:
| Element | Spec Limit (ppm) | Test Method |
|---|---|---|
| Na | < 100 | ICP |
| Si | < 50 | ICP |
| K | < 30 | ICP |
| Al | < 30 | ICP |
| Cu | < 30 | ICP |
| Ca | < 30 | ICP |
Values measured by Xnergy. Typical values for reference; not guaranteed unless otherwise specified.
Characteristics:
Battery-grade purity (>99.9%)
Stringent ICP-validated purity control ensures reproducible target phase formation in downstream sulfide electrolyte synthesis. Moreover, low metal impurities prevent parasitic reactions and reduce ionic conductivity loss in the finished electrolyte.
Fine, uniform particle size
D₅₀ of 1.7 μm and D₉₀ of 6.4 μm support efficient mechanochemical synthesis (ball-milling) and rapid solid-state reaction kinetics. As a result, customers achieve consistent batch-to-batch sulfide electrolyte performance.
Ultra-low moisture (<50 ppm)
Because Li₂S is highly moisture-sensitive, ultra-low residual moisture is essential. Xnergy’s Karl Fischer-validated <50 ppm spec preserves material integrity from synthesis to delivery.
Scalable supply for pilot and production
Available in pack sizes from 200 g samples to 25 kg bulk drums. Therefore, the same high-purity material supports both early-stage R&D and pilot-scale electrolyte manufacturing without requalification.
Packaging & Storage:
The material ships argon-packaged in vacuum-sealed bags. Therefore, customers should store sealed in an Ar or N₂ glovebox, protected from moisture. Because Li₂S is highly moisture-sensitive and reactive, handle exclusively in a controlled dry environment. Reseal promptly after opening.
Safety:
GHS Signal Word: Danger. Hazards: toxic if swallowed; causes severe skin burns; causes serious eye damage. Wear full PPE (chemical-resistant gloves, lab coat, safety goggles, respirator). Handle in a fume hood or glovebox. Refer to SDS for complete safety information.
Note: Values listed above are typical and for reference only. Performance of downstream electrolytes will depend on synthesis conditions, ball-milling parameters, and target electrolyte composition. Pair with our sulfide and halide solid-state electrolytes for complete ASSLB material solutions.
