Abstract An experimental and numerical study was conducted to quantify the flame retardant effects of different DMMP addition loadings on the flame extinction limits of four lithium-ion battery electrolyte solvents. The minimum extinguishing concentration (MEC) of CO2, which was measured using the cup-burner method, was applied to characterize the flame retardant effects of different DMMP loadings. Then, a model based on the perfectly stirred reactor concept was constructed to calculate the MEC and interpret the measurements established in the cup-burner test. A comparison was conducted between the measured and calculated MECs of N2 and a satisfactory agreement was obtained. Further investigation found that DMMP could significantly improve the extinction temperature by clearing the H radical, suppressing the reaction temperature and increasing the sensitivity of temperature to reaction rate constants, which caused the decrease in the flame extinction limit of solvents. The experimental results showed that DMMP has a certain saturation effect on reducing the flame extinction limits of solvents. For the four solvents, the sensibilities of the flame extinction limits to the DMMP additions were different, which were ranked in the order of diethyl carbonate > ethyl methyl carbonate > dimethyl carbonate > ethyl acetate.

中文翻译：

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甲基膦酸二甲酯（DMMP）对锂离子电池电解液溶剂熄火极限影响的研究

摘要 进行了实验和数值研究，以量化不同 DMMP 添加量对四种锂离子电池电解质溶剂的阻燃极限的阻燃效果。使用杯式燃烧器方法测量的 CO2 最小灭火浓度 (MEC) 用于表征不同 DMMP 负载的阻燃效果。然后，构建了一个基于完美搅拌反应器概念的模型来计算 MEC 并解释在杯式燃烧器测试中建立的测量值。在 N2 的测量和计算 MEC 之间进行了比较，并获得了令人满意的一致性。进一步研究发现DMMP可以通过清除H自由基显着提高消光温度，抑制反应温度，增加温度对反应速率常数的敏感性，导致溶剂的熄火极限降低。实验结果表明DMMP对降低溶剂的熄火极限有一定的饱和作用。4种溶剂对DMMP添加量的消焰极限敏感性不同，依次为碳酸二乙酯>碳酸甲乙酯>碳酸二甲酯>乙酸乙酯。