Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/130371
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Type: Journal article
Title: Preparation and electrochemical properties of high-capacity LiFePO₄-Li₃V₂(PO₄)₃/C composite for lithium-ion batteries
Other Titles: Preparation and electrochemical properties of high-capacity LiFePO(4)-Li(3)V(2)(PO(4))(3)/C composite for lithium-ion batteries
Author: Guo, Y.
Huang, Y.
Jia, D.
Wang, X.
Sharma, N.
Guo, Z.
Tang, X.
Citation: Journal of Power Sources, 2014; 246:912-917
Publisher: Elsevier
Issue Date: 2014
ISSN: 0378-7753
1873-2755
Statement of
Responsibility: 
Yong Guo, Yudai Huang, Dianzeng Jia, Xingchao Wang, Neeraj Sharma, Zaiping Guo, Xincun Tang
Abstract: LiFePO4–Li3V2(PO4)3/C (LFP–LVP/C) composite is prepared by a modified solid-state method, along with LFP/C composite as a reference. The structure and morphology of the as-prepared materials are analyzed by X-ray diffraction (XRD) and electron microscopy. LFP–LVP/C composite is well-crystallized and a matrix is formed by conductive carbon surrounding the LFP–LVP particles. LFP–LVP/C exhibits V-doped LFP in the bulk phase as determined by Rietveld analysis of XRD data, and mixed phase regions of V-doped LFP and LVP when analyzed at the particle-scale using high-resolution transmission electron microscopy. Electrochemical tests show that the initial discharge capacity of the LFP–LVP/C composite is 165.2 mAh g−1 at 0.1 C. Furthermore, the composite exhibits excellent performance with an initial discharge capacity of 135.4 mAh g−1 at a constant current density of 1 C, with no noticeable capacity fading after 100 cycles (141.6 mAh g−1), which is higher than that of LFP/C prepared by the same method for comparison. Thus, the introduction of LVP acts to improve electronic conductivity and Li+ diffusion of LFP/C.
Keywords: High-capacity; lithium iron phosphate–lithium vanadium phosphate/carbon composite; cathode material Lithium-ion batteries
Rights: © 2013 Elsevier B.V. All rights reserved.
DOI: 10.1016/j.jpowsour.2013.08.047
Grant ID: http://purl.org/au-research/grants/arc/DP1094261
Appears in Collections:Aurora harvest 4
Chemistry and Physics publications

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