Abstract:

Bis(fluorosulfonyl)imide salts (MFSI) are important fluorine-containing compounds. Lithium-ion batteries and sodium-ion batteries with electrolytes containing MFSI as the main salts have demonstrated excellent overall electrochemical performance. With the rapid development of the new energy industry, the synthesis of MFSI has received widespread attention and research. This paper primarily focused on the application of MFSI in the battery field, thoroughly discussed its synthesis process and purification methods, and then briefly introduced the preparation equipment and large-scale production status of lithium bis(fluorosulfonyl)imide（LiFSI）. Based on the above analysis, the paper further analyzed the existing problems in MFSI synthesis technology, and proposed that the exploration of the mechanism of the fluorination process of MFSI and the development of a safe and efficient catalytic fluorination process were the main directions for the future research. This article aimed to provide reference for the optimization and upgrade of MFSI synthesis technology, and further promoting the industrialization process of high-performance lithium-ion and sodium-ion batteries.

Key words: bis(fluorosulfonyl)imide salts, lithium salts, electrolytes, lithium-ion batteries, new energy

摘要：

双氟磺酰亚胺盐（MFSI）是一种重要的含氟化合物，其作为电解质盐在锂离子电池和钠离子电池的电解液中展现出优异的综合电化学性能。近年来，随着新能源行业的快速发展，MFSI的合成受到了学术界和新能源企业的广泛关注。本文重点介绍了MFSI在电池领域的应用，详细探讨了其合成工艺和提纯方法，并简要介绍了双氟磺酰亚胺锂（LiFSI）的制备装置和规模化生产情况。在此基础上，进一步分析了MFSI合成技术中仍然存在的问题，提出对MFSI氟化过程机制进行研究以及开发安全高效的催化氟化工艺将是未来的主要发展方向。本文旨在为MFSI合成技术的优化与升级提供参考，从而推动高性能锂电池和钠电池的产业化进程。

关键词: 双氟磺酰亚胺盐, 锂盐, 电解质, 锂离子电池, 新能源