Electric vehicle batteries regain 95 percent capacity
Researchers at Cornell University have developed a new technique for rehabilitating lithium-ion batteries used in electric vehicles, allowing for the recovery of about 95% of their original capacity instead of destroying them and extracting raw materials. The technique, called "Direct Electrode-to-Electrode Regeneration" (DEER), relies on removing the solid electrolyte interphase (SEI) layer accumulated on the electrodes using an electrochemical solution containing DMI substance, which restores battery performance and slows down degradation. Results showed that treated batteries can last around 800 cycles before beginning to degrade again. The regeneration process can be repeated, with potential improvements in economic efficiency. Recycling these cells with this method costs approximately $15.25 per kilogram, compared to $26.31 with traditional methods. The technique targets batteries that have lost capacity due to SEI buildup and represents an important step in shifting the recycling concept from merely extracting materials to reusing functional components, despite challenges related to industrial procedures and large-scale implementation.
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