80 °C direct repair
A deep eutectic solvent formed via hydrogen bonding between ethylene glycol and LiCl restores spent LiFePO₄ cathodes under mild conditions: replenishing Li, reducing Fe(III) to Fe(II), and revitalizing electrochemical performance without high-temperature calcination.
Wang, Tiansheng · Chaochao, Gao · Zhang, Xiaoxuan · Yu, Wen · Wang, Mi · Yang, Chao · Zhang, Jiaheng
Advanced Science 2025
80 °C regeneration at ambient pressure