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Lithium Salt

Lithium bis(fluorosulfonyl)imide (LiFSI)

Lithium Salt available by request for quote from Winigen Materials.

Product Details

Lithium bis(fluorosulfonyl)imide

Lithium bis(fluorosulfonyl)imide (LiFSI) is widely screened as a primary salt or co-salt when electrolyte developers need high ionic transport and robust interphase formation.

Category
Lithium Salt
Abbreviation
LiFSI
CAS Number
171611-11-3
Availability
RFQ

Typical Specification

  • Grade: Battery grade
  • Purity: > 99.9%
  • Water: <= 50 ppm
  • Formula: LiN(SO2F)2
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Technical Selection Guide

Why is LiFSI evaluated for advanced electrolytes?

Lithium bis(fluorosulfonyl)imide (LiFSI) is widely screened as a primary salt or co-salt when electrolyte developers need high ionic transport and robust interphase formation. It is especially relevant to lithium-metal, silicon-rich anode, fast-charge, concentrated-electrolyte, and low-temperature programs. LiFSI can be used in carbonate, ether, fluorinated, or localized-high-concentration systems, but its value depends on the complete formulation rather than the salt alone.

Why developers evaluate it

  • High salt dissociation and useful low-temperature conductivity
  • Strong relevance to lithium-metal and silicon-anode interphase design
  • Flexible use as a primary salt or co-salt

Development considerations

  • Aluminum-current-collector corrosion must be evaluated
  • Cost and purity requirements may differ from LiPF6
  • Performance depends strongly on solvent coordination and concentration

How to compare it

Compared with LiPF6, LiFSI often supports different transport and interphase behavior but requires more deliberate current-collector and high-voltage validation. Compared with LiTFSI, it is frequently selected where a smaller imide anion and strong conductivity are useful.

Technical Profile

Lithium-Ion Electrolyte Applications

Lithium bis(fluorosulfonyl)imide (LiN(SO2F)2) is a lithium electrolyte salt for lithium-ion electrolyte formulation, additive screening, and battery materials research. This material is available by RFQ for programs where low moisture, purity, and compatibility with carbonate or specialty solvent systems are key selection criteria.

  • Lithium-ion electrolyte formulation and salt screening
  • Carbonate, ether, or fluorinated solvent blend evaluation
  • Cell-development studies where low water content is important
  • Comparison with LiFSI, LiTFSI, LiBF4, and other lithium salts

Product FAQ

Common Questions

What is Lithium bis(fluorosulfonyl)imide (LiFSI) used for?

Lithium bis(fluorosulfonyl)imide (LiFSI) is used or screened for lithium-ion electrolyte formulation, salt screening, and battery research workflows. Winigen Materials can support RFQ-based supply and related electrolyte or battery materials development discussions.

What is the CAS number for Lithium bis(fluorosulfonyl)imide (LiFSI)?

The CAS number shown for Lithium bis(fluorosulfonyl)imide (LiFSI) is 171611-11-3.

What specifications are shown for Lithium bis(fluorosulfonyl)imide (LiFSI)?

The target specifications currently shown are battery grade, purity > 99.9%, and water <= 50 ppm. Final specifications, documentation, and available quantity can be confirmed during RFQ.

Can I request a quote for Lithium bis(fluorosulfonyl)imide (LiFSI)?

Yes. Use the request quote button on this page to pre-fill the product interest, category, and target specifications for Lithium bis(fluorosulfonyl)imide (LiFSI).