The product is High Quality lithium bis(fluorosulfonyl)imide with the CAS number 171611-11-3. Lithium bis(fluorosulfonyl)imide, also known as LiFSI, is a white crystalline powder. It has a high solubility in various organic solvents and good thermal stability.
Some of its key parameters include:
This product has a wide range of uses, especially in the field of energy storage.
1. Lithium - ion Batteries: LiFSI is an excellent electrolyte salt for lithium - ion batteries. It can improve the battery's conductivity, cycling performance, and safety. Compared with traditional lithium salts, LiFSI can reduce the formation of a solid - electrolyte interface (SEI) layer on the electrode surface, which helps to improve the battery's charge - discharge efficiency and lifespan.
2. Supercapacitors: In supercapacitors, LiFSI can be used as an electrolyte additive. It can enhance the energy density and power density of supercapacitors, and improve their electrochemical performance.
3. Other Applications: It can also be used in some special electrochemical devices, such as lithium - sulfur batteries and lithium - air batteries, to improve their performance.
1. Handling Precautions: When handling LiFSI, it is necessary to wear appropriate personal protective equipment, such as gloves, goggles, and a lab coat. Avoid inhalation of dust and contact with skin and eyes.
2. Storage Conditions: The product should be stored in a cool, dry, and well - ventilated place. It should be kept away from moisture, heat, and sources of ignition. It is recommended to store it in a sealed container to prevent moisture absorption.
3. Preparation of Electrolyte: To prepare an electrolyte solution, accurately weigh the required amount of LiFSI and add it to a suitable organic solvent under stirring. The concentration of LiFSI in the electrolyte can be adjusted according to the specific application requirements. Usually, the concentration ranges from 0.5 mol/L to 2 mol/L.
Case 1: A lithium - ion battery manufacturer replaced the traditional lithium hexafluorophosphate (LiPF₆) with LiFSI in their battery electrolyte. They found that the battery's cycling performance was significantly improved. After 500 charge - discharge cycles, the capacity retention rate of the battery using LiFSI was 85%, while that of the battery using LiPF₆ was only 75%. In addition, the battery using LiFSI showed better high - temperature performance, with less self - discharge at high temperatures.
Case 2: A research team used LiFSI as an electrolyte additive in a supercapacitor. They found that the energy density of the supercapacitor increased from 10 Wh/kg to 15 Wh/kg, and the power density also increased by 20%. The supercapacitor also showed better stability during long - term cycling tests.
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