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Lithium Phosphorous Sulfur Chloride (LPSCl)
Sulfide-based Solid Electrolytes
Lithium Phosphorous Sulfur Chloride (Li6PS5Cl), commonly referred to as LPSCl, is an argyrodite-type superionic solid electrolyte widely used in all-solid-state lithium battery research and development. Its argyrodite crystal structure enables high room-temperature ionic conductivity (10-3 S/cm) along with broad electrochemical stability and favorable compatibility with lithium metal anodes, as well as lower cost compared to germanium-containing compositions.
LPSCl Solid Electrolyte Powder
Produced using NEI’s proprietary manufacturing process, our LPSCl powder delivers high ionic conductivity for solid-state separator layers and composite electrodes. Because sulfide-based materials are highly reactive and moisture-sensitive, LPSCl is synthesized, processed, and packaged under strict inert atmospheric conditions to preserve chemical purity and ion transport performance.
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To accommodate different processing needs, NEI offers LPSCl in two grades:
- Standard Grade: Suitable for standard solid-state cell fabrication and general research applications.
- Fine Grade: Mechanically processed for applications requiring smaller particle dimensions to improve packing density and dispersion.
NEI also offers custom synthesis to incorporate compositional modifications or substitute dopants into the argyrodite structure.
Select a category below to learn more about our LPSCl, including technical and safety information, download spec sheet & SDS files, review ordering information, or to request a quote.
Product SpecificationsSafety InformationTechnical DownloadsRelated ProductsOrdering InformationRequest a Quote
Product Specifications
LPSCl & Fine LPSCl
Key Product Specs:
- Chemical Formula: Li6PS5Cl
- CAS #: 1015037-41-8
- Crystal Structure: Argyrodite
- Crystal Density: 1.64 g/cm3
- Ionic Conductivity: 1 – 2 x 10-3 S/cm
(unsintered, cold-pressed pellet @ RT) - View Full Spec Sheet (pdf)
LPSCl XRD Pattern
Note: Due to the highly reactive and air-sensitive nature of sulfide electrolytes, particle size distribution testing is not performed, and custom particle size tailoring is not available for LPSCl or other sulfide-based materials.
Product Safety Information
LPSCl is a flammable solid that requires strict handling precautions due to its extreme reactivity with moisture. When exposed to ambient air or water, LPSCl rapidly hydrolyzes to generate hydrogen sulfide gas (H2S)—a toxic, flammable, and corrosive compound with a characteristic rotten-egg odor. LPSCl must be processed and stored exclusively under a dry inert atmosphere (such as an argon glovebox) while using appropriate personal protective equipment and continuous H2S gas monitoring. In the event of a fire, never use water or foam; only Class D dry powder or inert dry suppressants should be applied.
Precautions for Safe Handling
Handle in a controlled environment, under inert gas. Never allow product to come in contact with moisture or water. Appropriate personal protective equipment should be used at all times. Avoid contact with eyes and skin. Provide good ventilation or extraction and avoid breathing vapors.
Conditions for Safe Storage
Store under inert gas in a cool, dry, and well-ventilated place. Keep container tightly sealed and protect from moisture. Never allow product to get in contact with water during storage.
Refer to the Safety Data Sheet for complete information on the safe handling of this material.
Shipping Classification
LPSCl is classified as a Dangerous Goods (Hazmat) shipment due to its water-reactive and toxic properties, requiring regulated UN-certified packaging, proper hazard labeling, and strict compliance with air or ground transport regulations (small quantity exceptions of 30g or less may apply).
Technical Downloads
View and download (pdf) the latest technical information for NEI’s LPSCl powder.
Related Products
NANOMYTE® SSE-20
For researchers and manufacturers developing wet-processed electrolyte membranes or composite cathodes, LPSCl powder can be paired with NANOMYTE® SSE-20 dispersion fluid to prepare stable, uniform slurries for tape casting and coating applications on-site (sold separately).
Additional Products
Sulfide-based Solid Electrolytes – Choose from a variety of sulfide-compositions synthesized by NEI, such as LSPS, LPS, LPSCl, and more.
Oxide-based Solid Electrolytes – NEI produces a variety of oxide-based compositions, such as LLTO, LLZO, and LLZTO.
Polymer-based Solid Electrolytes – Our polymer electrolytes, complexed with highly conductive lithium salts, are made exclusively by NEI.
Phosphate-based Solid Electrolytes – NEI produces high phase purity phosphate-based solid electrolyte powders, such as LATP and LAGP.
Sodium-ion Solid Electrolytes – NEI offers “NATP” Sodium Aluminum Titanium Phosphate solid electrolyte powder for Na-ion batteries.
Halide-based Solid Electrolytes – NEI is now offering Lithium Indium Chloride (Li3InCl6) powder, a halide-based solid electrolyte.
Custom Solid Electrolyte Materials – NEI is well positioned to reproducibly synthesize small and large quantities of custom solid electrolyte compositions.
Ordering Information
To request pricing for any of our solid electrolyte materials, please complete our quote form. Additional details about our ordering process can be found below.
All of NEI’s materials are shipped directly to you from our facilities in Somerset, NJ (USA). For customers in South Korea and Japan, please send us your request and we will put you in touch with our local representatives.
Available Quantities
- Minimum Order Quantity: 10 grams
- Price Tier Quantities: 10g, 25g, 50g, 100g, 250g, 500g, and 1kg
- Bulk quantities are available upon request
- Unfortunately, we are unable to provide free samples.
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Updated August 5, 2026