Enhanced electrochemical performance of the fluidization separation graphite powders from waste power lithium-ion batteries by phenolic resin carbon coated

The recycling of waste lithium batteries (LIBs) is important for the healthy development of the LIBs industry. In this work, a column fluidized bed was designed to recover graphite powder from waste LIBs, and the phenolic resin-coated recovered graphite powder composites ware prepared by liquid-phase impregnation-carburization method, which effectively repaired the pores and defects on the surface of recycled graphite powders. The composites exhibited better Li storage performance than the recovered graphite powders. When the current density was 0.05 A/g, the composite obtained at 5% phenolic resin coating displayed a high reversible capacity of 451.0 mAh/g and an initial coulombic efficiency of 68.0%. The specific capacity was maintained at 131.9 mAh/g at a higher current density 1.0 A/g, the reversible capacity gradually increased from 464.4 to 546.1 mAh/g after 100 cycles at a current density of 0.1 A/g, indicating outstanding rate performance and excellent cycling stability.