With the rapid development of the renewable energy industry, lithium-ion batteries have been widely applied as important energy storage devices in various fields. However, the use of lithium-ion batteries poses safety hazards such as self-ignition and explosions. Adding flame retardant additives to the electrolyte is an effective method to enhance battery safety, although it may lead to a decline in electrochemical performance. This paper provides an overview of the mechanisms of flame retardant additives, analyzes the characteristics of organic phosphorus-based, organic halogen-based, and composite phosphazene flame retardants, and summarizes the latest research progress on these additives in improving the safety performance of lithium-ion battery electrolytes. The aim is to provide valuable theoretical references for enhancing the safety of lithium-ion batteries.
XI et al. (Sun,) studied this question.
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