The rise of lithium bis(fluorosulfonyl) imide: An efficient alternative to LiPF6 and functional additive in electrolytes

Abstract

Lithium bis (fluorosulfonyl) imide (LiFSI), as a potential replacement for lithium hexafluorophosphate (LiPF₆) and as an electrolyte additive for lithium-ion batteries, is attracting attention due to its advantages in low-temperature performance, multiplication capacity and cycle life. LiFSI exhibits superior performance compared to LiPF₆, especially as an additive in high-power applications. However, it still faces challenges such as collector corrosion and complex production processes. Researchers are actively exploring solutions to face these challenges, primarily by optimizing electrolyte formulations to enhance LiFSI performance, improving synthesis processes to reduce costs and increase yields, and scaling up production to meet market demand. Despite the challenges, research and applications of LiFSI are increasing, and its performance, cost-effectiveness, and environmental benefits make it a strong contender for future battery technology. Continuous research and development will be the key to determining the scope of its integration and improvement in the battery industry.