Method for recycling positive electrode material of waste lithium battery from electrolytic gas field water

CN122118159APending Publication Date: 2026-05-29CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHONGQING UNIV
Filing Date
2026-04-02
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing technologies, the recycling of waste lithium battery cathode materials and the treatment of gas field water are independent of each other, making it impossible to achieve simultaneous harmless treatment and resource utilization, resulting in resource waste and increased environmental burden.

Method used

Using pretreated gas field water as the electrolyte and power generated by the power generation system of the natural gas well site, the valuable metals of the waste lithium battery cathode material are leached in the anode chamber through an H-type ion membrane electrolyzer, and the metal ions are reduced and precipitated in the cathode chamber, while hydrogen and chlor-alkali products are produced simultaneously. The entire process does not require the addition of external acids or alkalis, and achieves the synergistic treatment of gas field water and waste lithium batteries.

Benefits of technology

It has achieved the harmless treatment of gas field water and the efficient recovery of valuable metals such as lithium, cobalt, nickel, and manganese, producing hydrogen and chlor-alkali products, reducing carbon emissions and improving resource utilization and product purity.

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Abstract

The application relates to the field of resource recycling, and specifically discloses a method for recycling waste lithium battery positive electrode materials from electrolytic gas field water. The method comprises the following steps: preparing sodium hydroxide and sodium carbonate solids; sequentially treating the gas field water with the sodium hydroxide and the sodium carbonate to precipitate and remove impurity ions such as magnesium and calcium, and obtaining pretreated gas field water; taking the pretreated gas field water as an electrolyte, placing waste lithium battery positive electrode materials in an anode chamber of an ion membrane electrolytic cell, performing constant current electrolysis by relying on green power of a natural gas well site, leaching valuable metals from the anode, synchronously generating hydrogen and precipitating metals at the cathode, and synchronously outputting chlor-alkali products from the anode; after electrolysis, solid-liquid separation is performed on materials at the two poles respectively, finally, the anode liquid and the cathode liquid are mixed to co-precipitate residual metal ions, mixed metal precipitates are obtained after filtration, and the product can be used for lithium battery positive electrode material regeneration. The application couples gas field water treatment and battery recycling, treats waste with waste, does not need to add acid and alkali, and has a green and low-carbon process, so that the utilization of waste resources is realized and high value utilization is achieved.
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