Kinetic modeling study on the combustion treatment of cathode from spent lithium-ion batteries. Issue 1 (January 2020)

• Record Type: Journal Article
• Authors: Yao, Zhitong; Yu, Shaoqi; Su, Weiping; Wu, Daidai; Wu, Weihong; Tang, Junhong
• Is Part Of: Waste management & research. Volume 38:Issue 1(2020:Jan.)
• Page Start: 100
• Page End: 106
• Publication Date: 2020-01
• Subjects: Spent lithium-ion batteries -- polyvinylidene fluoride -- cathode material -- model-free method -- Criado method; Factory and trade waste -- Periodicals; Refuse and refuse disposal -- Periodicals; Municipal engineering -- Periodicals; Déchets industriels -- Périodiques; Déchets -- Élimination -- Périodiques; Génie urbain -- Périodiques; 628
• DOI: 10.1177/0734242X19879224
• Languages: English
• ISSNs: 0734-242X

Abstract

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.