An olivine LiFe <sub>0.5</sub> Mn <sub>0.5</sub> PO <sub>4</sub> /rGO composite cathode material prepared from manganese ore tailings with excellent lithium storage performance
Wenhan Xu, Jinhuan Yao, Qi-Ze Huang, Shao-Shuai Bai, Yanwei Li, Jiqiong Jiang, Jianwen Yang
Abstract
Abstract The high‐value utilization of manganese ore tailings is of great significance for saving mineral resources and achieving environmental protection. Herein, an olivine LiFe 0.5 Mn 0.5 PO 4 /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 0.5 Mn 0.5 PO 4 /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 0.5 Mn 0.5 PO 4 /rGO material has excellent structural stability and electrochemical reversibility during charge and discharge processes. Furthermore, the LiFe 0.5 Mn 0.5 PO 4 /rGO//graphite full Li‐ion battery also exhibits excellent cycling stability indicating its potential commercialization value.