High performed composites of LiFePO4/3DG/C based on FePO4 by hydrothermal method. (20th August 2017)

• Record Type: Journal Article
• Authors: Zhan, T.T.; Jiang, W.F.; Li, C.; Luo, X.D.; Lin, G.; Li, Y.W.; Xiao, S.H.
• Is Part Of: Electrochimica acta. Volume 246(2017)
• Page Start: 322
• Page End: 328
• Publication Date: 2017-08-20
• Subjects: Hydrothermal method -- Spherical FePO4 -- Three-dimensional porous Graphene -- Composites -- Electrochemical performance; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.05.151
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Composites of spherical FePO4 and three-dimensional porous graphene (FP/3DG) were prepared through hydrothermal method, then the high-performed composites of three-dimensional graphene and LiFePO4 cathode materials (LFP/3DG/C) were prepared with the FP/3DG precursor by carbothermic reduction. Researches on the structure, morphology and electrochemical performance of the materials were carried out by XRD, SEM, Raman, EIS, CV and charge-discharge tests. The results show that the LFP/3DG/C composites exhibit excellent rate and cycling capabilities. At the current density of 0.2C, the first charge/discharge specific capacities were 167.2 mAh/g and 165.1 mAh/g, respectively, and the capacities remained 99.3% after 50 cycles; The discharge capacity was 144.7 mAh/g and the capacity remains 99.6% after 100 cycles at 1C rate, while the discharge capacity was 91.3 mAh/g at 10C rate. Compared with LFP/C materials, the LFP/3DG/C composites showed obvious improvement in rate capability and cycling stability.