Lithium Tantalate WaferCAS #: 12031-66-2

Synonyms

 Tantalum lithium oxide; Lithium tantalate(V); Lithium tantalum oxide; lithium oxido(dioxo)tantalum; lithium tantalum trioxide

Compound Formula: LiO3Ta 

Molecular Weight: 235.89 

Appearance: Crystalline solid 

Melting Point: 1650 °C 

Boiling Point: N/A 

Density: 7.46 g/cm3 

Solubility in H2O: N/A 

Exact Mass: 235.948744 

Monoisotopic Mass: 235.948744

Product Introduction: Sodium Bis(trifluoromethanesulfonyl)imide (NaTFSI, CAS #: 12031-66-2)

Sodium bis(trifluoromethanesulfonyl)imide, with the chemical formula NaN(SO₂CF₃)₂ and CAS number 12031-66-2, is a high-performance sodium salt emerging as a key electrolyte component in sodium-ion batteries (SIBs) and advanced sodium-based electrochemical systems. This white crystalline solid combines a sodium cation (Na⁺) with a bis(trifluoromethanesulfonyl)imide anion (TFSI⁻), offering exceptional thermal stability, high ionic conductivity, and broad compatibility with electrode materials. Its unique structure minimizes hydrolysis and corrosive byproduct formation, making it a critical material for enhancing the safety, cycle life, and performance of next-generation sodium-based energy storage devices.

Chemical & Physical Properties

NaTFSI exhibits a set of properties that position it as a premium electrolyte salt for sodium-based systems:

Solubility: Highly soluble in a wide range of polar organic solvents, including ethylene carbonate (EC), dimethyl carbonate (DMC), and propylene carbonate (PC), as well as in ionic liquids. This solubility allows for flexible formulation of electrolytes, including high-concentration and localized high-concentration systems tailored to SIB chemistries.

Ionic Conductivity: Delivers excellent ionic conductivity (up to 7 mS/cm in optimized solvent blends), facilitating efficient sodium-ion transport in SIBs and enabling high-rate charge-discharge performance.

Thermal Stability: Maintains stability at temperatures up to approximately 270°C, significantly outperforming conventional sodium salts like sodium hexafluorophosphate (NaPF₆) and enhancing battery safety in high-temperature environments.

Electrochemical Window: Boasts a wide electrochemical stability window (up to 5.0 V vs. Na⁺/Na), compatible with high-voltage SIB cathodes such as Prussian blue analogs, sodium nickel manganese oxides (NaxNi₀.₅Mn₀.₅O₂), and sodium vanadium phosphates (Na₃V₂(PO₄)₃).

Hydrolytic Stability: Exhibits strong resistance to hydrolysis compared to NaPF₆, minimizing the formation of corrosive hydrofluoric acid (HF) even when exposed to trace moisture, thus protecting electrode materials and extending battery lifespan.

Key Applications in Energy Storage

Sodium bis(trifluoromethanesulfonyl)imide (CAS 12031-66-2) is pivotal to advancing sodium-based energy storage technologies:

Sodium-Ion Batteries (SIBs): Used as a primary or co-salt in SIB electrolytes to improve performance, particularly in low-cost, large-scale energy storage systems for grid applications. Its stability enhances cycle life (often exceeding 3,000 cycles) and reduces capacity fade, addressing key challenges in SIB commercialization.

Sodium-Metal Batteries: Enables the development of high-energy-density sodium-metal batteries by forming a stable solid electrolyte interphase (SEI) on sodium metal anodes, suppressing dendrite growth—a critical barrier to realizing practical sodium-metal systems.

Solid-State Sodium Batteries: Integral to polymer and composite solid electrolytes, where its high solubility in polymer matrices (e.g., PEO) enhances ionic conductivity, enabling the transition from liquid to solid electrolytes for improved safety and durability.

Sodium-Based Supercapacitors: Utilized in electrolytes for sodium-ion supercapacitors, where its high conductivity and stability contribute to high power density and long cycle life, making it suitable for applications requiring rapid energy delivery.

Advantages Over Conventional Sodium Salts

NaTFSI offers significant benefits compared to traditional sodium electrolyte salts like NaPF₆ and sodium tetrafluoroborate (NaBF₄):

Stability: Superior thermal, chemical, and hydrolytic stability reduces electrolyte degradation, minimizing gas generation and extending battery lifespan—critical for grid storage systems with long service requirements.

Performance: Enables higher energy and power densities by supporting high-voltage cathodes and fast charge rates, narrowing the performance gap between SIBs and lithium-ion batteries in stationary applications.

Compatibility: Works seamlessly with a broad range of SIB electrode materials, including hard carbon anodes, layered oxides, and polyanionic cathodes, providing flexibility in battery design.

Safety: Reduced risk of thermal runaway and HF formation enhances battery safety, making it suitable for large-scale installations and industrial energy storage.

Synthesis & Quality Control

NaTFSI is synthesized through precise processes to ensure high purity and consistency:

Precursor Formation: Trifluoromethanesulfonamide (CF₃SO₂NH₂) reacts with trifluoromethanesulfonyl chloride (CF₃SO₂Cl) in the presence of a base to form bis(trifluoromethanesulfonyl)imide (HTFSI).

Sodiation: HTFSI is neutralized with sodium hydroxide (NaOH) or sodium carbonate (Na₂CO₃) in an organic solvent, followed by crystallization to produce NaTFSI.

Purification: Recrystallization from anhydrous solvents (e.g., acetonitrile) and drying under vacuum remove residual moisture and impurities, ensuring purity levels of 99.9% or higher.

Quality control involves ion chromatography (IC) for anion analysis, inductively coupled plasma mass spectrometry (ICP-MS) for trace metal detection, and Karl Fischer titration to verify moisture content (typically below 10 ppm). Battery-grade NaTFSI undergoes additional purification to meet strict industry standards.

Safety & Handling

Proper handling of NaTFSI is essential to maintain performance and safety:

Hygroscopicity: Absorbs moisture moderately from the air; store in sealed containers under an inert atmosphere (e.g., nitrogen or argon) to prevent hydration.

Toxicity: May cause skin and eye irritation; use chemical-resistant gloves, goggles, and a lab coat when handling. In case of contact, rinse thoroughly with water.

Reactivity: Avoid contact with strong reducing agents and combustible materials, as it may act as an oxidizer under extreme conditions.

Storage: Keep in a cool, dry, well-ventilated area, away from heat sources and direct sunlight.

Refer to the product’s Safety Data Sheet (SDS) for detailed safety guidelines and emergency response procedures.

Packaging & Availability

We offer NaTFSI in various forms to suit different applications:

Anhydrous Powder: Packaged in moisture-proof aluminum bags (100g–10kg) with inert gas purging to prevent hydration.

Solutions: Available as pre-dissolved solutions (5–20% w/w) in organic solvents (e.g., EC/DMC mixtures) or ionic liquids, packaged in 1L–50L containers for easy integration into electrolyte formulations.

Bulk quantities (50kg+ drums) are available for industrial-scale production. Custom purities and particle sizes can be provided to meet specific customer requirements, including ultra-low metal impurity grades for advanced battery research.

For technical specifications, pricing, or sample requests, contact our sales team, which specializes in advanced electrolyte materials for sodium-based energy storage systems.

Health & Safety Information 

Signal Word: Warning 

Hazard Statements: H302-H312-H332 

Hazard Codes: Xn 

Risk Codes: 20/21/22 

Safety Statements: 36 

RTECS Number: WW5470000 

Transport Information: N/A 

WGK Germany: 3

Chemical Identifiers 

Linear Formula: LiTaO3 

Pubchem CID: 5148101 

MDL Number: MFCD00016174 

EC No.: 234-757-5 

IUPAC Name: lithium; oxido(dioxo)tantalum 

Beilstein/Reaxys No.: N/A 

SMILES: [Li+].[O-][Ta](=O)=O 

InchI Identifier: InChI=1S/Li.3 O.Ta/q+1;;;-1;

InchI Key: CIFJATMCNLSYQG-UHFFFAOYSA-N

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.