Efficient separation and recovery method of battery electrode material and current collector

By applying a constant voltage or current in the electrolytic cell, the lithium-ion battery electrode material and current collector are separated by bubbles generated in situ on the interface, which solves the problems of high energy consumption, high pollutant emissions and low recovery efficiency of the existing lithium-ion battery recycling technology, and achieves high efficiency and low energy consumption electrode material recycling.

CN119733736APending Publication Date: 2025-04-01TONGJI UNIV
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Patent Information

Application Number
CN202411818473.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-11
Publication Date
2025-04-01

AI Technical Summary

Technical Problem

The existing lithium-ion battery recycling technology has problems such as high energy consumption, high pollutant emissions, high cost and low recycling efficiency.

Method used

By placing an electrolyte in the electrolytic cell, the battery electrode sheet is placed on the cathode or anode of the electrolytic cell, corresponding to the porous conductive electrode, a constant voltage or current is applied, and the electrode material and current collector are separated by bubbles generated in situ at the interface.

Benefits of technology

The efficient separation between the electrode material and the current collector is achieved. The metal impurities content in the electrode material are extremely low, the energy consumption is low, and the separation time is short, which improves the recycling efficiency and reduces the cost.

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Abstract

The invention relates to an efficient separation and recovery method of a battery electrode material and a current collector, which comprises the following steps of: putting electrolyte into an electrolytic bath, placing a battery electrode slice on a cathode or an anode of the electrolytic bath, placing a porous conductive electrode corresponding to the battery electrode slice on the anode or the cathode of the electrolytic bath, applying constant voltage or current, separating to obtain a current collector and a battery electrode material; the battery electrode plate comprises a battery electrode material and a current collector. The recycling method comprises the step of cleaning and recycling the battery electrode material obtained by the separation method. Compared with the prior art, the method has the advantages that the electrode material and the current collector in the pole piece are separated by using the bubbles generated in situ on the interface, the loss of the electrode material and the current collector in the separation process can be ignored by virtue of an accurate separation means, and meanwhile, the content of metal impurities in the recycled electrode material is extremely low.
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