Given the rising lithium-ion battery retirement trend, there is a pressing need for a sustainable, and industrially viable positive active powder reprocessing method. A synergistic redox strategy, based on thermodynamic calculations of potential self-promoting reactions in mixed LFP/NCM systems, for the recovery of spent LFP and NCM batteries was proposed. In this strategy, the spontaneous extraction and oxidation of Fe2+ to Fe3+ took place within the acidic solution atmosphere encapsulating LFP. Simultaneously, NCM underwent further reduction, yielding Ni2+ and Fe2+, thereby enabling the proficient dissolution and segregation of metal ions. The leaching rate of Li, Ni, Co and Mn was close to 100% , and the final raw material was reprepared into a battery with a capacity of 168.8 mAh g-1 at 1 C, and the cycle retention rate was 76.78% after 300 cycles. This strategy achieves closed-loop recycling of all elements and generates 12% higher profits compared to separate processes.

You have access to this article

Please wait while we load your content... Something went wrong. Try again?