A facile ultrasound assisted high temperature ball milling synthesis of LiFePO4/graphene with enhanced electrochemical performance

作者：Li, Xuetian; Shao, Zhongbao^*; Liu, Kuiren; Zhao, Qing; Liu, Guangfu; Xu, Binshi

来源：International Journal of Hydrogen Energy, 2018, 43(41): 18773-18782.

DOI：10.1016/j.ijhydene.2018.08.061

• LiFePO4
• Graphene
• Cathode material
• Ultrasound assisted
• High temperature ball milling method

LiFePO4/graphene (LiFePO4/G) cathode material was prepared by a facile ultrasound assisted high temperature ball milling method. Ultrasound assisted was found to be effective to promote the dispersing of the precursor in solution. Physical and electrochemical properties of LiFePO4/G were studied. The results exhibited that graphene combined with the LiFePO4 clusters giving rise to a conductive network. LiFePO4/G displayed a well-crystallized LiFePO4 structure and excellent electrochemical performance. The initial discharge capacities of LiFePO4/G were 162.8, 156.8, 151.9, 145.8, 137.5 and 121.6 mAhg(-1) at rates of 0.1, 0.5, 1.0, 2.0, 5.0 and 10 C, respectively. Moreover, at 0.1 C-rate, the capacity was 160.4 mAhg(-1) over 100 cycles with a capacity retention of 98.5%. It is concluded that graphene is a conductive additive which can enhance the electrochemical properties of LiFePO4.

• 出版日期2018-10-11
• 单位东北大学