Upcycling spent medium-Ni cathodes via novel liquified salts sourcing
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D5EE01086A.pdf
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Author(s)
Yoon, Moonsu
Park, Jin-Sung
Chen, Weiyin
Huang, Yimeng
Dai, Tao
Lee, Yumin
Shin, Jungmin
Lee, Seungmi
Kim, Yongil
Lee, Dongsoo
Date Issued
April 2, 2025
Journal
Energy & Environmental Science
Publisher
Royal Society of Chemistry
Citation
Yoon, Moonsu, Park, Jin-Sung, Chen, Weiyin, Huang, Yimeng, Dai, Tao et al. 2025. "Upcycling spent medium-Ni cathodes via novel liquified salts sourcing." Energy & Environmental Science, 18 (12).
Version
Final published version
Abstract
The rapid growth in lithium-ion battery technology underscores the urgent need for sustainable recycling to address the environmental and economic challenges of battery waste. This study introduces a liquified-salts-assisted upcycling approach to transform spent medium-Ni cathodes into high-performance single-crystalline Ni-rich cathodes. Utilizing the LiOH–LiNO3–Ni(NO3)2·6H2O eutectic, this method leverages planetary centrifugal mixing to create a liquid-like environment for accelerated elemental diffusion and microstructural refinement. The in situ liquefaction of these salts ensures seamless precursor integration, achieving compositional uniformity and minimizing impurity formation. Compared to conventional solid-state methods, our method significantly suppresses rock-salt phase formation, and improves electrochemical performance with superior cycling stability and rate capability. The environmental and economic advantages of our approach highlight its potential to reduce greenhouse gas emissions and energy consumption. This scalable, energy-efficient strategy provides a transformative solution for battery waste management, paving the way for the sustainable production of next-generation cathode materials.
MIT Department
Massachusetts Institute of Technology. Department of Nuclear Science and Engineering
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1039/D5EE01086A
