CAS 171611-11-3
Product Overview
Lithium bis(fluorosulfonyl)imide, commonly shortened to LiFSI, is a white crystalline sulfonimide-based lithium salt with the molecular formula LiN(SO₂F)₂. This electrolyte-grade lithium salt exhibits high solubility in polar aprotic carbonate solvents, excellent thermal stability, and better hydrolysis resistance than traditional lithium salts. It can function as either a co-salt or the primary conductive salt for high-nickel, high-voltage and semi-solid lithium-ion-battery electrolyte systems.
Product Detailed Description
This advanced lithium-salt material achieves its distinctive electrochemical properties through its unique sulfonimide anion structure. The large, delocalized FSI⁻ anion weakens ion-pair interactions within carbonate-based solvents, bringing higher ionic conductivity and improved lithium-ion transference numbers in electrolyte formulations. Unlike lithium hexafluorophosphate, LiFSI remains thermally stable above 200 °C and generates far less corrosive hydrogen fluoride upon exposure to trace moisture. It facilitates the formation of thin, uniform LiF-rich SEI layers on graphite or silicon-based anodes. This stable interfacial film suppresses persistent parasitic side reactions and effectively extends battery cycle life.
Commercial-grade battery-grade LiFSI is supplied as free-flowing white crystalline powder. Tight control over moisture, free-fluoride content, sulfate residues and metallic impurities is essential for real-world battery applications. Even ppm-level contaminants can compromise interfacial stability and reduce cell capacity retention. In practical electrolyte development, LiFSI is often blended with LiPF₆ as a co-salt to enhance high-temperature resistance, low-temperature discharge performance and cycling durability for power-battery and large-format energy-storage cells. It also serves as the primary conductive salt for semi-solid batteries, lithium-metal cells and high-voltage-platform devices. Since LiFSI is hygroscopic, sampling, material transfer and packaging must be performed under inert-gas shielding to prevent performance degradation.
As a trusted chemical supply-chain provider, we implement strict quality-control protocols for lithium bis(fluorosulfonyl)imide. Our battery-grade material delivers high active-component assays with closely tracked moisture, anionic-impurity and trace-metal parameters. Closed-loop synthesis, purification and inert-atmosphere sealing procedures minimize batch-to-batch variation. Consistent physicochemical specifications prevent quality drift that would otherwise result in erratic electrolyte performance or shortened service life for downstream battery-material manufacturers.
Purchasers gain tangible practical benefits by selecting our supply. First, consistent product specifications reduce repeated incoming-material laboratory testing for your technical teams and cut raw-material waste during continuous large-scale electrolyte compounding. Second, we provide comprehensive export-oriented documentation including COA and MSDS to streamline cross-border customs clearance and corporate safety-audit workflows. Third, purpose-built inert-gas-sealed packaging supports small-scale trial-batch orders as well as high-volume bulk-industrial procurement. Our technical team can share practical guidance on anhydrous-handling and storage best practices when customers encounter real-world production challenges.
We fully understand overseas buyers' core concerns regarding product stability, document completeness and safe transportation. Store this hygroscopic lithium salt in hermetically-sealed containers within cool, dry, inert-atmosphere warehouse conditions. Isolate it from humid air, liquid water, protic solvents and strong oxidizing agents. Corrosion-resistant PPE and dry-box operating environments are mandatory for all material-handling operations. Every shipment undergoes pre-shipment inspection prior to dispatch. We have extensive export experience with high-purity new-energy lithium-series chemicals and maintain long-term stable partnerships with electrolyte and battery-material manufacturers worldwide. This proven track-record demonstrates our reliable supply capabilities.
CTA (Call-to-Action)
If you are sourcing qualified battery-grade Lithium Bis(fluorosulfonyl)imide (LiFSI) for high-voltage power-battery electrolytes, energy-storage-cell formulation or advanced-battery-research projects, please submit your inquiry. Kindly specify your impurity-level requirements, packaging specifications and order volume. Our sales-technical team will respond within 24 hours and provide a competitive quotation alongside complete supporting-document sets. Laboratory-evaluation samples are available upon request.
Contact us: E-mail：xima777@ximachem.com Tel：+8617356006695
FAQ
Q1: What are the major application fields of Lithium Bis(fluorosulfonyl)imide (LiFSI)?
A1: It is a high performance conductive salt, usable as either primary salt or co salt for lithium ion battery electrolytes. It is widely adopted in high nickel power batteries, large scale energy storage cells, high voltage platforms, semi solid batteries and lithium metal battery research.
Q2: What core advantages does LiFSI offer compared with conventional LiPF₆?
A2: LiFSI features superior thermal stability, higher ionic conductivity and better hydrolysis tolerance. It forms stable LiF rich SEI films to prolong cell cycle life and mitigates HF driven corrosion risks in electrolyte systems under harsh operating conditions.
Q3: What storage and handling precautions apply to LiFSI powder?
A3: Keep containers hermetically sealed in cool, dry, inert atmosphere storage areas. Avoid exposure to moist air and liquid water. Complete all material transfer procedures inside dry box facilities while wearing corrosion resistant PPE.
Q4: Can you supply lab test samples for performance assessment?
A4: Yes, small quantity laboratory assessment samples are available with proper inert gas protective packaging. Buyers are responsible for associated sample related costs and freight charges.
Q5: What export supporting documents can you provide for shipment?
A5: We can furnish COA, MSDS, packing list and commercial invoice to support your import customs clearance procedures.
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