Recent progress in sustainable recycling of LiFePO4-type lithium-ion batteries: Strategies for highly selective lithium recovery
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 LiFePO4 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 LiFePO4 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¨Cdischarge 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 LiFePO4.
Reference: Sustainability | Free Full-Text | Recovery of Lithium Iron Phosphate by Specific Ultrasonic Cavitation Parameters | HTML (mdpi.com)
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