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    Effect of Ti-doping on the electrochemical performance of lithium vanadium(III) phosphate 
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    Effect of Ti-doping on the electrochemical performance of lithium vanadium(III) phosphate

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    Accepted version (4.658Mb)
    Volume
    21
    Pagination
    1501 - 1508
    DOI
    10.1007/s11581-014-1325-7
    Journal
    Ionics
    Issue
    6
    ISSN
    0947-7047
    Metadata
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    Abstract
    © 2014, Springer-Verlag Berlin Heidelberg. Carbon-coated and titanium-substituted lithium vanadium phosphate composites have been successfully prepared through a sol-gel method followed by solid-state reaction under argon. Li3V1.9Ti0.1(PO4)3-C (LVT10PC) and Li3V1.85Ti0.15(PO4)3-C (LVT15PC) were investigated using X-ray powder diffraction, thermal analysis, transmission electron microscopy, cyclic voltammetry, and galvanostatic tests. Different models for the solid solution mechanism in this system are discussed. Electrochemical tests, at a charge-discharge rate of 0.2 C, in the range 2.8–4.4 V show that LVT10PC delivers the highest discharge capacity of 121 mA h g−1and declines to 115.7 mA h g−1up to the 60th cycle, corresponding to a 4.4 % loss. At low levels, titanium substitution is found to increase initial discharge capacity compared to the carbon-coated unsubstituted system (LVPC). Further substitution is found to have detrimental effects on initial discharge capacity and cycling behaviour.
    Authors
    Stankov, SM; Abrahams, I; Momchilov, A; Popov, I; Stankulov, T; Trifonova, A
    URI
    http://qmro.qmul.ac.uk/xmlui/handle/123456789/11856
    Collections
    • School of Biological and Chemical Sciences [1659]
    Licence information
    “The final publication is available at http://link.springer.com/article/10.1007/s11581-014-1325-7”
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