Lithium Bis(fluorosulfonyl)imide LiFSI CAS 171611-11-3, for Lithium-Ion Battery

Product Specification

1. Product Overview

Lithium Bis(fluorosulfonyl)imide (LiFSI) is a high-performance lithium salt material and an important component of next-generation lithium-ion battery electrolytes. Compared with conventional lithium hexafluorophosphate (LiPF₆), LiFSI offers better thermal stability, higher ionic conductivity, and superior low-temperature performance, making it highly valuable for power batteries, energy storage batteries, high-voltage batteries, and next-generation lithium battery systems.

High-purity LiFSI requires strict control of moisture, free acid, metal ions, and anionic impurities, and is classified as a high-value-added battery material.

2. Product Specifications

Product Name: Lithium Bis(fluorosulfonyl)imide

English Name: Lithium Bis(fluorosulfonyl)imide

Abbreviation: LiFSI

CAS No.: 171611-11-3

Batch No.: JY2026032001

Net Weight: 500 kg

Production Date: March 20, 2026

Shelf Life: September 20, 2026

Product Form: White Powder

3. Product Quality Specifications

Appearance: White Powder

Melting Point: 143°C (Specification 140°C)

Thermal Decomposition Temperature: >200°C

Assay (Content): 99.98% (Specification >99.9%)

Moisture: 23 ppm (Specification <80 ppm)

Insoluble Matter: 82.11 ppm (Specification <300 ppm)

Free Acid: 54.2 ppm (Specification <100 ppm)

4. Key Impurity Control

Ionic and Metal Impurity Test Results:

F⁻: 2.69 ppm (<10 ppm)

Cl⁻: <1 ppm (<2 ppm)

SO₄²⁻: 1.81 ppm (<10 ppm)

Fe: 0.91 ppm (<2 ppm)

Na: 1.01 ppm (<10 ppm)

K, Ca, Cr, Ni, Pb, Zn, Cu, Cd, Mg: All <1 ppm

The product demonstrates excellent metal impurity control, meeting the requirements for battery material applications.

5. Product Structural Characteristics

① Bis(fluorosulfonyl)imide Anion Structure

The FSI⁻ anion exhibits strong electrochemical stability, enhancing electrolyte performance.

② High Thermal Stability

Thermal decomposition temperature exceeding 200°C contributes to improved battery safety.

③ Low Moisture Requirements

Battery electrolyte systems are highly sensitive to moisture; low ppm moisture control is critical.

6. Main Application Areas

① Lithium-Ion Battery Electrolytes

Used as a high-performance lithium salt, either as an additive or as the primary lithium salt.

② Power Batteries

Used in new energy vehicle power battery systems.

③ Energy Storage Batteries

Used in large-scale energy storage and high-cycle-life battery applications.

④ High-Voltage Lithium Battery Systems

Suitable for next-generation high-performance battery research and development.

7. Product Advantages

① High Purity

LiFSI content reaches 99.98%, meeting high-end battery material requirements.

② Low Moisture Content

Moisture content of 23 ppm, superior to the <80 ppm specification.

③ Low Impurity Levels

Metal ions and anionic impurities are effectively controlled.

④ Batch Supply Capability

This batch supplies 500 kg, suitable for industrial customer procurement.

8. Packaging and Supply Information

Supply Specification: 500 kg

Available Documentation:

-Certificate of Analysis (COA);

-Technical Data Sheet (TDS);

-Safety Data Sheet (SDS);

-Export-Related Documentation.

Suitable for lithium battery material enterprises and international customer procurement.

9. Russian Market Procurement Considerations

Customers typically focus on the following:

-LiFSI Purity;

-Moisture Content (ppm);

-Free Acid Content;

-Metal Impurities;

-Thermal Stability;

-Batch-to-Batch Consistency;

-Completeness of Export Documentation.

10. Frequently Asked Questions (FAQ)

Q: What are the main applications of LiFSI?

A: It is mainly used in lithium-ion battery electrolytes and new energy battery materials.

Q: What is the quality of this product?

A: According to the COA from Changzhou Jiayuan Chemical Co., Ltd., this batch of LiFSI has a content of 99.98% and moisture of 23 ppm, with a test conclusion of PASS.

Q: Why is LiFSI attracting attention?

A: LiFSI offers good thermal stability, electrochemical performance, and low-temperature performance, making it an important direction for new lithium salt development.