Abstract We synthesized and investigated (2-chloro-4-methoxy)-phenoxy pentafluorocyclotriphosphazene (2-Cl-4-MPPFPP) as a safety additive for lithium-ion batteries. Experimental results demonstrate that the addition of 2-Cl-4-MPPFPP into the base electrolyte reduces electrolyte flammability. Moreover, 2-Cl-4-MPPFPP, which is electro-polymerized at 4.5 V (vs. Li/Li + ), is demonstrated to protect LiMn 2 O 4 /Li cells from voltage runaway at overcharge. A 5 vol% concentration of 2-Cl-4-MPPFPP in the electrolyte was shown to have a negligible effect on the cycling and lower discharge rate performances of LiMn 2 O 4 /Li cells.

中文翻译：

---

（2-氯-4-甲氧基）-苯氧基五氟环三磷腈作为锂离子电池安全添加剂

摘要 我们合成并研究了（2-氯-4-甲氧基）-苯氧基五氟环三磷腈（2-Cl-4-MPPFPP）作为锂离子电池安全添加剂。实验结果表明，将 2-Cl-4-MPPFPP 添加到基础电解液中会降低电解液的可燃性。此外，在 4.5 V（相对于 Li/Li + ）下电聚合的 2-Cl-4-MPPFPP 被证明可以保护 LiMn 2 O 4 /Li 电池免受过度充电时的电压失控。电解液中浓度为 5 vol% 的 2-Cl-4-MPPFPP 对 LiMn 2 O 4 /Li 电池的循环和较低的放电倍率性能的影响可以忽略不计。