Direct regeneration of fluorine-doped carbon-coated LiFePO4 cathode materials from spent lithium-ion batteries

Fluorine-doped carbon-coated LiFePO 4 materials are regenerated by sintering residual PVDF after separating spent electrode strips via methanol-citric acid, with a good capacity of 141.5 mA h g −1 at 1C and a retention rate of 99.6% after 100 cycles.