An olivine LiFe_0.5Mn_0.5PO₄/rGO composite cathode material prepared from manganese ore tailings with excellent lithium storage performance

The high-value utilization of manganese ore tailings is of great significance for saving mineral resources and achieving environmental protection. Herein, an olivine LiFe_0.5Mn_0.5PO₄/rGO composite is synthesized by a simple precipitation method and subsequent high-temperature calcination process using the manganese ore tailings as raw material. The prepared LiFe_0.5Mn_0.5PO₄/rGO composite exhibits superior cycling stability (with 113.5 mAh·g⁻¹ after 300 cycles at 1.0C (1.0C = 170 mA·g⁻¹)) and superior rate performance (with 65.6 mAh·g⁻¹ at 10.0C). Ex-situ XRD and electrochemical impedance spectroscopy (EIS) analyses evidence that the LiFe_0.5Mn_0.5PO₄/rGO material has excellent structural stability and electrochemical reversibility during charge and discharge processes. Furthermore, the LiFe_0.5Mn_0.5PO₄/rGO//graphite full Li-ion battery also exhibits excellent cycling stability indicating its potential commercialization value.