ABSTRACT Direct regeneration of spent LiFePO 4 (LFP) cathodes is a sustainable alternative to conventional recycling methods. However, poor remediation efficiency and complex processes limit its application. Here, we develop a room‐temperature liquid‐phase strategy based on a deep green lithium naphthalenide (Li‐Naph) solution. This strategy utilizes radical anion‐driven electron‐ion coupling remediation chemistry to integrate electron donors, lithium transport, and surface reconstruction within a single solution‐phase platform. The strongly reducing naphthalene radical anion enables spontaneous electron transfer at ambient conditions, efficiently converting Fe 3+ back to Fe 2+ , while promoting surface lithium enrichment through coupled electron–ion interactions. Subsequent annealing allows the enriched lithium to diffuse into lithium vacancies, while the organic residues undergo in situ carbonization into a conformal conductive shell, achieving synergistic bulk repair and surface reconstruction. This chemistry fully restores the olivine framework, suppresses Fe–Li anti‐site defects, and markedly enhances Li + transport kinetics. The regenerated cathode delivers a high initial capacity of 140.1 mAh g −1 and retains 92% capacity after 650 cycles at 1C, even maintaining excellent stability at a high rate of 5C. Importantly, the strategy remains effective for severely degraded cathodes, highlighting the broad applicability of radical‐anion‐driven repair chemistry.
Wang et al. (Thu,) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: