Kinetic modeling study on the combustion treatment of cathode from spent lithium-ion batteries
Kinetic modeling study on the combustion treatment of cathode from spent lithium-ion batteries
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废旧锂离子电池正极燃烧处理动力学模型研究
DOI：
10.1177/0734242x19879224
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发表时间：
2020-01
影响因子：
3.9
通讯作者：
Junhong Tang
中科院分区：
文献类型：
--
作者：
Zhitong Yao;Shaoqi Yu;Weiping Su;Daidai Wu;Weihong Wu;Junhong Tang
热处理为废旧锂离子电池回收过程中铝箔和正极材料的分离提供了另一种方法。在这项工作中，基于六种无模型（等转换）方法研究了阴极的燃烧动力学，即Flynn-Wall-Ozawa (FWO)、Friedman、Kissinger-Akahira-Sunose、Starink、Tang 和Boswell 方法。还使用主图方法（Criado 方法）探讨了可能的分解机制。热重分析表明，整个热过程可分为三个阶段，温度分别为37-578℃、578-849℃和849-1000℃。这些无模型方法得出的活化能（Eα）显示出相同的趋势，在0.002-0.013的转换范围内逐渐增加，并在超出该范围时显着升高。 FWO方法的系数较大，所得Eα落在10.992~40.298 kJ/mol范围内，平均值为20.228 kJ/mol。将理论主图与实验曲线进行比较，几何收缩模型可以更好地描述阴极的热分解。
Thermal treatment offers an alternative method for the separation of aluminum foil and cathode materials during spent lithium-ion batteries recycling. In this work, the combustion kinetic of cathode was studied based on six model-free (isoconversional) methods, namely Flynn–Wall–Ozawa (FWO), Friedman, Kissinger–Akahira–Sunose, Starink, Tang, and Boswell methods. The possible decomposition mechanism was also probed using a master-plots method (Criado method). Thermogravimetric analysis showed that the whole thermal process could be divided into three stages with temperatures of 37–578°C, 578–849°C, and 849–1000°C. The activation energy (Eα) derived from these model-free methods displayed the same trend, gradually increasing with a conversion range of 0.002–0.013, and significantly elevating beyond this range. The coefficients from the FWO method were larger, and the resulted Eα fell into the range of 10.992–40.298 kJ/mol with an average value of 20.228 kJ/mol. Comparing the theoretical master plots with an experimental curve, the thermal decomposition of cathode could be better described by the geometric contraction models.
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