Lithium Tin Phosphorous SulfideCAS #: N/A

Synonyms

 LSPS

Molecular Weight: 634.85 

Appearance: Gray powder 

Melting Point: N/A 

Boiling Point: N/A 

Density: N/A 

Solubility in H2O: N/A 

Crystal Phase / Structure: Tetragonal 

True Density: 2-C.225 g/cm3 

Size Range: 7-8 µm 

Specific Surface Area: 1.45 m2/g 

Morphology: N/A

Product Introduction: Lithium Tin Phosphorous Sulfide

Lithium Tin Phosphorous Sulfide (LTPS) is a promising class of inorganic solid electrolytes that has garnered significant attention in the field of next-generation battery technology. Comprising lithium (Li), tin (Sn), phosphorous (P), and sulfur (S) in varying stoichiometric ratios—often represented as LiₓSnᵧP_zS_w—this material combines the advantages of high ionic conductivity, chemical stability, and compatibility with lithium metal anodes, making it a key candidate for advancing solid-state battery (SSB) performance.

Chemical & Physical Properties

LTPS exhibits a set of properties that distinguish it as a high-performance solid electrolyte:

Ionic Conductivity: Typically ranges from 10⁻⁴ to 10⁻³ S/cm at room temperature, a value comparable to liquid electrolytes, enabling efficient lithium-ion transport within battery cells.

Crystal Structure: Often adopts a argyrodite-like or thiophosphate-based structure, characterized by a rigid framework with mobile lithium ions, facilitating fast ion diffusion.

Mechanical Stability: Possesses good mechanical strength, allowing it to form stable interfaces with both cathode and anode materials without cracking or delamination during charge-discharge cycles.

Electrochemical Stability: Demonstrates a wide electrochemical window (up to ~5 V vs. Li⁺/Li), making it compatible with high-voltage cathodes (e.g., nickel-rich oxides) used in high-energy-density batteries.

Non-Flammability: Unlike liquid electrolytes, LTPS is solid and non-volatile, eliminating the risk of leakage or combustion, thus enhancing battery safety.

Key Applications in Battery Technology

The unique properties of Lithium Tin Phosphorous Sulfide position it as a critical material in the development of advanced energy storage systems:

Solid-State Batteries (SSBs): As a solid electrolyte, LTPS replaces flammable liquid electrolytes in SSBs, addressing safety concerns while enabling the use of lithium metal anodes. This combination significantly increases energy density (potentially exceeding 500 Wh/kg) compared to conventional lithium-ion batteries.

Electric Vehicles (EVs) and Portable Electronics: SSBs incorporating LTPS offer longer driving ranges for EVs and extended runtime for devices like smartphones and laptops, thanks to their higher energy density. The non-flammable nature also reduces the risk of thermal runaway, a critical safety feature for consumer and automotive applications.

Grid Energy Storage: LTPS-based batteries show promise for stationary energy storage, where long cycle life (thousands of charge-discharge cycles) and stability under varying temperatures are essential. Their robustness makes them suitable for integration into renewable energy systems (e.g., solar and wind storage).

Advantages Over Traditional Electrolytes

LTPS outperforms conventional liquid electrolytes and other solid electrolytes in several key areas:

Safety: Eliminates the risk of fire or explosion associated with liquid electrolytes, which are prone to leakage and thermal decomposition.

Energy Density: Enables the use of lithium metal anodes (which have a much higher theoretical capacity than graphite), paired with high-voltage cathodes, to achieve significantly higher energy densities.

Cycle Life: Reduces interfacial resistance between electrolyte and electrodes, minimizing capacity fade over repeated cycles and extending battery lifespan.

Temperature Tolerance: Maintains stable performance across a broad temperature range (-40°C to 80°C), making it suitable for extreme environments.

Synthesis & Quality Control

LTPS is typically synthesized through high-energy ball milling or solid-state reaction methods:

Precursor Mixing: High-purity lithium sulfide (Li₂S), tin sulfide (SnS or SnS₂), phosphorus pentasulfide (P₂S₅), and elemental sulfur (S) are mixed in precise ratios to achieve the desired stoichiometry.

Reaction Process: The mixture is either ball-milled under inert atmosphere to form an amorphous or nanocrystalline product, or heated at elevated temperatures (300–600°C) to induce crystallization and improve ionic conductivity.

Purification: Post-synthesis processing removes impurities and ensures uniform particle size distribution, critical for consistent electrolyte performance in battery cells.

Each batch undergoes rigorous testing, including X-ray diffraction (XRD) for structural analysis, impedance spectroscopy for ionic conductivity measurement, and electrochemical cycling tests to validate performance.

Safety & Handling

While LTPS itself is non-toxic and non-flammable, proper handling is essential to maintain its integrity:

Moisture Sensitivity: Reacts with water vapor to form toxic hydrogen sulfide (H₂S) gas; store and handle in a dry, inert atmosphere (e.g., argon-filled glove boxes).

Mechanical Protection: Avoid excessive grinding or impact, as this may alter particle size and reduce ionic conductivity.

Disposal: Dispose of waste material in accordance with local regulations, as decomposition products may be hazardous.

Packaging & Availability

We offer Lithium Tin Phosphorous Sulfide in sealed, moisture-proof containers (10g–1kg) for laboratory research and pilot-scale production. Custom formulations with tailored stoichiometries and particle sizes are available to meet specific battery design requirements.

For technical specifications, sample requests, or bulk pricing, please contact our research and development team, which specializes in advanced electrolyte materials for energy storage applications.

Health & Safety Information 

Signal Word: Danger 

Hazard Statements: H206-H228-H301-H314-H332-H400 

Hazard Codes: N/A 

Risk Codes: N/A 

Safety Statements: N/A 

RTECS Number: N/A 

Transport Information: UN 3131 4.3/PG II 

WGK Germany: 3

Chemical Identifiers

 Linear Formula: Li10SnP2S12

Packing of Standard Packing: 

Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 735 gallon liquid totes Special package is available on request.