The rational design of flame-retardant electrolytes is essential for improving the safety of lithium ion batteries. Cooling is the key to curbing thermal runaway and compatibility is the basis to ensure electrochemical performance. Here we design a composite electrolyte with a double safety protection mechanism with self-cooling and flame-retardant effects simultaneously. N,N-Dimethylacetamide (DMAC) as a Lewis base can improve the thermal stability and perfluoro-2-methyl-3-pentanone (PFMP) with a self-cooling function can act as an internal micro-fire-extinguisher. Acceptable electrochemical performance is ensured via the introduction of a fluorocarbon surfactant (FS) that can improve the interface compatibility. This composite electrolyte is a good alternative for lithium ion batteries as it presents beneficial properties both in electrochemical performance and thermal stability.

中文翻译：

---

用于安全锂离子电池的自冷阻燃电解质†

阻燃电解质的合理设计对于提高锂离子电池的安全性至关重要。冷却是抑制热失控的关键，而兼容性是确保电化学性能的基础。在这里，我们设计了一种具有双重安全保护机制的复合电解质，该机制同时具有自冷和阻燃作用。N，N-二甲基乙酰胺（DMAC）作为路易斯碱可改善热稳定性，具有自冷功能的全氟-2-甲基-3-戊酮（PFMP）可作为内部微型灭火器。通过以下方式确保可接受的电化学性能引入可改善界面相容性的碳氟表面活性剂（FS）。这种复合电解质是锂离子电池的良好替代品，因为它在电化学性能和热稳定性方面均表现出有益的性能。