Direct regeneration of waste LiFePO4 cathode materials with a solid-phase method promoted by activated CNTs

Synopsis: A highly-efficient, economical and easily-industrialized method is developed for recycling waste LiFePO4 (LFP) battery cathode. The decay and regeneration mechanisms of LFP are deeply studied via microscopic characterization and electrochemical testing. Regenerated LFP achieves an excellent capacity recovery (around 99% the specific capacity of new LFP) and long-term cycling stability (over 800 cycles at 1 C). In addition, its main costs only account for 33.7% the price of new LFP.