Researchers have introduced a novel noninvasive rejuvenation strategy using magneto-electrochemical synergistic activation (MEA) to enhance the performance of nickel-rich layered cathodes (NCM811) in lithium-ion batteries. This approach addresses the challenges of Ni/Li antisite disorder, which degrades battery efficiency, by applying a magnetic field during electrochemical activation. The magnetic field transitions nickel ions from high-spin to low-spin states, reducing super-exchange interactions and enabling ordered rearrangement of ions in the cathode’s structure. MEA significantly improves structural stability, lithium diffusion, and electrochemical performance, with a rejuvenated NCM811 cathode achieving a 90% capacity retention after 1000 cycles and improved initial Coulombic efficiency. Additionally, the method is cost-effective, energy-efficient, and environmentally friendly, offering a sustainable pathway for recycling and regenerating end-of-life batteries. This strategy has broad implications for extending battery life and advancing large-scale energy storage technologies.
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https://www.nature.com/articles/s41467-024-54641-z
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