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This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. You can use material from this article in other publications, without requesting further permission from the RSC, provided that the correct acknowledgement is given and it is not used for commercial purposes.
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This work was supported by the National Key Research and Development Program of China (2023YFC3903500 & 2019YFC1908304) and the National Natural Science Foundation of China (21676022 & 21706004).
National Key Research and Development Program of China, 2023YFC3903500, Junqing Pan, 2019YFC1908304, Junqing Pan; National Natural Science Foundation of China, 21676022, Junqing Pan, 21706004, Junqing Pan
Xifei Li and Jiujun Zhang are editorial board members/editors-in-chief for Electrochemical Energy Reviews and were not involved in the editorial review or the decision to publish this article. All authors declare that there are no competing interests.
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
A research team led by Dr. Jung-Je Woo at the Gwangju Clean Energy Research Center of the Korea Institute of Energy Research (KIER) has successfully developed a cost-effective and eco-friendly technology for recycling cathode materials from spent lithium-ion batteries.
With the recent rise in electric vehicles and mobile devices, managing spent batteries has become a critical global challenge. By 2040, the number of decommissioned electric vehicles is expected to exceed 40 million, leading to a sharp increase in waste batteries. Developing advanced recycling technologies has thus become an urgent priority, as the metals in batteries pose a significant risk of soil and water contamination.
In conventional battery recycling, the typical method involves crushing spent batteries and extracting valuable metals such as lithium, nickel, and cobalt through chemical processes. However, this process requires high-concentration chemicals, which generate wastewater, and it demands substantial energy consumption due to the need for high-temperature furnaces that contribute significantly to carbon dioxide emissions.
To address these issues, direct recycling technology, which recovers and restores original materials without chemical alteration, has been attracting growing interest. However, direct recycling also has drawbacks, as it requires high-temperature and high-pressure conditions and involves complex procedures, making it both time-consuming and costly.
The research team has developed a novel technology for directly recycling spent cathode materials from lithium-ion batteries through a simple process that addresses the limitations of conventional recycling methods. This innovative approach restores the spent cathode to its original state by immersing it in a restoration solution under ambient temperature and pressure, effectively replenishing lithium ions.
The key technology is the application of galvanic corrosion using a restoration solution. Galvanic corrosion occurs when two dissimilar materials are in contact within an electrolyte environment, leading to the selective corrosion of one metal to protect the other. By utilizing this sacrificial mechanism, the research team has innovatively adapted this phenomenon for application in battery recycling.
A research team led by Dr. Jung-Je Woo at the Gwangju Clean Energy Research Center of the Korea Institute of Energy Research (KIER) has successfully developed a cost-effective and eco-friendly technology for recycling cathode materials* from spent lithium-ion batteries.*Cathode Materials: Materials that play a crucial role in generating electricity by storing and releasing lithium ions during battery charging and discharging.
The bromine in the restoration solution initiates spontaneous corrosion upon contact with the aluminum in the spent battery. During this process, electrons are released from the corroded aluminum and subsequently transferred to the spent cathode material. To maintain charge neutrality, lithium ions in the restoration solution are inserted into the cathode material. This recovery of lithium ions restores the cathode material to its original state.
Additionally, unlike conventional methods that require disassembly of the spent battery, the restoration reaction takes place directly within the cell, significantly enhancing the efficiency of the recycling process.
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