全氟己酮微乳液抑制锂离子电池热失控研究

Research on inhibition of lithium-ion battery thermal runaway by dodecafluoro-2-methylpentan-3-one microemulsion

为了研究针对锂离子电池热失控的灭火剂,以全氟己酮为油相,采用氟碳表面活性剂全氟辛酸钠和助表面活性剂全氟丁醇将全氟己酮进行乳化,将水相进行包裹,配制出1种油包水的全氟己酮微乳液。研究不同配比下的全氟己酮微乳液对热失控的影响,比较和讨论全氟己酮微乳液的灭火效果、冷却能力以及毒性危害。研究结果表明:全氟己酮微乳液能够有效地抑制锂离子电池明火,相较于单一材料具有更好的冷却和抑制电池内部反应效果;全氟己酮灭锂离子电池火灾会增大释放气体的窒息毒性,而全氟己酮微乳液可以有效地解决毒性增加问题。研究结果可为抑制锂离子电池火灾的灭火剂研究提供参考。

To study the fire extinguishing agent for thermal runaway of lithium-ion batteries,a water-in-oil dodecafluoro-2-methylpentan-3-one(C_(6)F_(12)O)microemulsion was prepared by emulsifying C_(6)F_(12)O as the oil phase with a fluorocarbon surfactant,sodium perfluorooctanoate,and a co-surfactant,perfluorobutanol,and encapsulating the aqueous phase.The influence of C_(6)F_(12)O microemulsion with different ratios on thermal runaway was investigated,and the fire extinguishing effect,cooling capacity and toxic hazard of the C_(6)F_(12)O microemulsion were compared and discussed.The results show that the C_(6)F_(12)O microemulsion can effectively inhibit the open fire of lithium-ion batteries,and has a better cooling and inhibition effect on internal reaction effect of battery than single material.The use of C_(6)F_(12)O alone to extinguish battery fire may increase the toxicity of the system,but the C_(6)F_(12)O microemulsion can effectively solve this problem.The results can provide guidance for the research of fire extinguishing agents to inhibit the lithium-ion battery fire.