The application advantages of lithium bisfluorosulfonimide in the field of lithium batteries are highlighted, and the industry has entered a period of rapid development

Lithium bisfluorosulfonyl imide is called LiFSI in English and its chemical formula is F2NO4S2.Li. Because lithium bisfluorosulfonyl imide has good high temperature resistance (stable at temperatures below 200°C), good low temperature performance, is not easy to hydrolyze, and is more environmentally friendly, it can be used as the next generation secondary lithium ion to replace lithium hexafluorophosphate. Battery electrolyte lithium salt. For now, lithium bisfluorosulfonyl imide, as an electrolyte additive for lithium-ion batteries, is usually mixed with lithium hexafluorophosphate and used in the electrolyte of rechargeable lithium batteries to improve battery capacity and electrochemical performance of the battery. In addition, lithium bisfluorosulfonyl imide also has important industrial uses as a polymerization catalyst and industrial antistatic agent.

Currently, based on cost and safety considerations, lithium hexafluorophosphate is still the most widely used solute lithium salt for lithium batteries. However, with the widespread application of lithium hexafluorophosphate and people’s increasing requirements for lithium batteries, lithium hexafluorophosphate has the disadvantages of poor thermal stability and easy hydrolysis. Prominent, resulting in shorter life and reduced safety of lithium batteries. In comparison, lithium bisfluorosulfonyl imide has better performance in terms of low temperature resistance, high temperature performance, conductivity, safety, etc. The complex preparation process, higher cost and greater pollution during the production process of lithium bisfluorosulfonyl imide have become important obstacles to the widespread use of lithium bisfluorosulfonyl imide. In recent years, stimulated by the development of the new energy automobile industry, relevant companies and scientific research institutes have increased their research and development efforts on the production process of lithium bisfluorosulfonyl imide. Its production technology has continued to mature, production costs have also declined, and pollution emissions have further improved. control. More importantly, with the sharp increase in demand and price of lithium hexafluorophosphate, the cost-effectiveness of lithium bisfluorosulfonimide is highlighted, and the demand for lithium bisfluorosulfonimide is also rising.

With strong growth in downstream demand and good market expectations, the global lithium bisfluorosulfonimide industry has continued to expand its production capacity, with most of the production capacity located in China. According to the released “China Lithium Bisfluorosulfonimide (LiFSI) Industry Application Market Demand and Development Opportunities Research Report 2022-2025》shows that in 2021, the global production capacity of lithium bisfluorosulfonyl imide industry will exceed 8,000 tons, of which China’s production capacity will exceed 7,000 tons. Kangpeng Technology, Xinzhoubang, Yongtai Technology, Xinzhoubang and other companies have production capacity under construction of more than 100 million. In addition, foreign companies such as Nippon Shokubai and South Korea’s Tempo also have plans to expand production. It is expected that the global production capacity of the bisfluorosulfonimide lithium industry will grow rapidly in the next few years.

Analysts believe that lithium bisfluorosulfonyl imide, as a powerful electrolyte material, has limited performance due to process, cost, pollution, etc. The problem cannot be applied on a large scale. As the process technology and pollution problems are gradually solved, the market demand for lithium bisfluorosulfonyl imide continues to rise, especially the new energy automobile industry’s overall improvement in the requirements for lithium batteries and the main electrolyte lithium salt of lithium batteries. With the sharp rise in the price of lithium hexafluorophosphate, the overall advantages of lithium bisfluorosulfonimide are more obvious, and may gradually replace lithium hexafluorophosphate in lithium battery electrolytes, thus accelerating the development of the lithium bisfluorosulfonimide industry.