Recovery of Lithium Iron Phosphate by Specific Ultrasonic Cavitation Parameters

Ming Zhou, Kanglin Liu, Mingdeng Wei, Jingwei Zhang, Song Chen and Wanli Cheng
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Ming Zhou: College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Kanglin Liu: College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Mingdeng Wei: College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Jingwei Zhang: College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China
Song Chen: Fujian Special Equipment Inspection and Research Institue, Fuzhou 350000, China
Wanli Cheng: College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China

Sustainability, 2022, vol. 14, issue 6, 1-16

Abstract: With the widespread use of lithium iron phosphate batteries in various industries, the amount of waste lithium iron phosphate batteries is also increasing year by year, and if not disposed of in a timely manner, will pollute the environment and waste a lot of metal resources. In the composition of lithium iron phosphate batteries, the cathode has an abundance of elements. The ultrasonic method is a crucial method to recover waste LiFePO 4 batteries. It has the following disadvantages, such as the lack of empirical parameters and suitable research equipment. In order to overcome the inefficiency of the LiFePO 4 recycling method, the airborne bubble dynamical mechanism of ultrasound in the removal of lithium phosphate cathode material was studied by a high-speed photographic observation and Fluent simulation and the disengagement process. Mainly aimed at the parameters such as action time, power, frequency, and action position in the detachment process were optimized. The recovery efficiency of lithium iron phosphate reached 77.7%, and the recovered lithium iron phosphate powder has good electrochemical properties, with the first charge–discharge ratio of up to 145 (mAh)/g. It is shown that the new disengagement process established in this study was adopted for the recovery of waste LiFePO 4 .

Keywords: ultrasound; cavitation; lithium iron phosphate; high-speed photography; fluent (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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