A facile ultrasound assisted high temperature ball milling synthesis of LiFePO4/graphene with enhanced electrochemical performance. (11th October 2018)

• Record Type: Journal Article
• Authors: Li, Xuetian; Shao, Zhongbao; Liu, Kuiren; Zhao, Qing; Liu, Guangfu; Xu, Binshi
• Is Part Of: International journal of hydrogen energy. Volume 43:Number 41(2018)
• Page Start: 18773
• Page End: 18782
• Publication Date: 2018-10-11
• Subjects: LiFePO4 -- Graphene -- Cathode material -- Ultrasound assisted -- High temperature ball milling method; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2018.08.061
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: 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 . Highlights: LiFePO4 /graphene was obtained by ultrasound assisted high temperature ball milling. Graphene coating on LiFePO4 improved its electronic conductivity. The obtained LiFePO4 /graphene exhibited an excellent electrochemical performance.