Lithium Bis(fluorosulfonyl)imide, LiFSI

CAS Number: 171611-11-3

Lithium bis(fluorosulfonyl)imide, commonly referred to as LiFSI, has the chemical formula LiF₂NO₄S₂, appears to be white powder, with its molecular weight 187.07, melting point 124~128°C (255~262.4°F). LiFSI is thermally stable up to 200 °C. LiFSI has good electrochemical stability and high conductivity. LiFSI exhibits far superior stability towards hydrolysis, better low temperature performance, and is more environmentally friendly than LiPF₆.

LiFSI is a promising new electrolyte additive for power Li-ion batteries, showing increased conductivity over LiPF₆. Bis(fluorosulfonyl)imide has also been tested in next generation gel polymer electrolytes, as well as primary lithium battery electrolytes, with improved safety properties. LiFSI can also be used as a polymerization catalyst and as an antistatic agent in industrial fields.

Poworks manufactures and supplies lithium bis(fluorosulfonyl)imide for a variety of applications.