Advanced Methods Extend Lithium‑Ion Battery Life and Reuse

Researchers at Cornell University have created a Direct Electrode‑to‑Electrode Regeneration (DEER) process that immerses spent lithium‑ion cells in a specialized chemical bath (1,3‑Dimethyl‑2‑Imidazolidinon). Laboratory tests show the method can restore up to 95 % of the original capacity, cut manufacturing costs by around 56 % compared with new cells, and reduce water use and emissions. The team is now working to apply the technique to heavily degraded industrial batteries.

Separately, scientists at Rutgers University have developed a porous polymer current collector coated with an ultra‑thin metal layer. Licensed to Soteria Battery Innovation Group, the flexible collector accommodates electrode expansion, prevents delamination, lowers internal resistance, and includes a safety feature that melts the polymer to interrupt current if the cell overheats. The technology is aimed at high‑performance applications such as aviation, electric vehicles and stationary storage, offering longer life and enhanced safety for lithium‑ion batteries.