Geochemistry‐Driven Recovery of Li and Fe From Spent LiFePO ₄ Cathodes via Stabilized Phosphorus Mineralization

The rapid expansion of lithium iron phosphate (LFP) batteries presents a critical challenge for sustainable end‐of‐life management, where conventional recycling methods heavily depend on intensive acid/oxidant use and overlook persistent phosphorus pollution. Herein, we propose a geochemistry‐guided mineral stabilization strategy that enables acid‐ and oxidant‐free extraction of valuable metals and a simultaneous phosphorus fixation process from spent LFP cathodes. By exploring CaCl 2 as a mineralization promoter, phosphorus is selectively immobilized into the stable mineral Goryainovite (Ca 2 PO 4 Cl) with a fixation efficiency exceeding 99.9%, thereby preventing aqueous phosphorus release at the source. Simultaneously, lithium and iron are efficiently extracted as soluble chlorides and subsequently recovered as high‐grade Li 2 CO 3 and Fe 2 O 3 with yields above 90% through stepwise precipitation. This work establishes a transformative paradigm that integrates geochemical stabilization principles with sustainable resource recovery, offering an environmentally benign pathway for the valorization of spent batteries and other phosphorus‐bearing wastes.