The industrial-grade black mass of LiFePO

4

/LiNi

x

Mn

y

O

4

/C from spent lithium-ion battery is difficult to be recovered because of its complex composition. In this study

a recycling of graphite and comprehensive recovery of valuable metals from industrial-grade black mass of spent lithium-ion battery was proposed. Acid leaching can separate graphite and cathode materials well. The separated graphite was purified by roasting

and its electrochemical properties were tested. The specific discharge capacity of graphite purified at 600° are the best

which reach 342.46 mA·h·g

-1

at 0.1 C. After 50 cycles at 0.1 C

the capacity retention rate was 98.26%. The charge-discharge cycle stability was improved at high rates. Nearly 100% of copper can be recovered from leaching solution by electrodeposition. FePO

4

·2H

2

O is recovered by adjusting the pH of the solution to 2

and α-FePO

4

is obtained by roasting. Ni

Mn and Li can be recovered by precipitation separation. The optimum conditions for the recovery process was determined

and the mechanisms of the leaching and electrodeposition process were characterized by XRD

XPS

SEM-EDS.