Efficient Direct Recycling Strategy of Spent LiFePO 4 Cathodes by Structural Defect Repair and Interface Construction

(R-LFP). Moreover, the strengthening of Fe-O and P─O bonds further increases the overall structural stability of R-LFP, resulting in its remarkable electrochemical performance. The R-LFP electrode material delivers 163 mAh/g specific capacity during the first discharge cycle at 0.1C and retains 93.5% of its initial capacity after 500 cycles at 1C. This economical and environmentally friendly recycling strategy provides a greatly promising solution for the sustainable recovery of lithium-ion batteries (LIBs).