Core−Shell Li3V2(PO4)3@C Composites as Cathode Materials for Lithium-Ion Batteries

Core−Shell Li3V2(PO4)3@C Composites as Cathode Materials for Lithium-Ion Batteries

Core−shell Li3V2(PO4)3@C nanostructured composites were prepared via a sol−gel route followed by hydrothermal treatment. XRD patterns showed that Li3V2(PO4)3 has a monoclinic structure with space group P21/n. TEM images exhibited that Li3V2(PO4)3 particles are encapsulated with a carbon shell ∼10 nm...

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Bibliographic Details
Published in:Journal of physical chemistry. C Vol. 112; no. 14; pp. 5689 - 5693
Main Authors: Ren, M. M, Zhou, Z, Gao, X. P, Peng, W. X, Wei, J. P
Format: Journal Article
Language:English
Published: American Chemical Society 10-04-2008
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Summary:Core−shell Li3V2(PO4)3@C nanostructured composites were prepared via a sol−gel route followed by hydrothermal treatment. XRD patterns showed that Li3V2(PO4)3 has a monoclinic structure with space group P21/n. TEM images exhibited that Li3V2(PO4)3 particles are encapsulated with a carbon shell ∼10 nm in thickness. Compared with pure Li3V2(PO4)3, core−shell Li3V2(PO4)3@C composites presented enhanced electrochemical Li ion intercalation performances. Cyclic voltammetry and electrochemical impedance spectroscopy disclosed that carbon shells improved Li ion diffusion and electrical conductance significantly and also retarded formation of solid electrolyte interphase film of Li3V2(PO4)3 cathode materials.
Bibliography:istex:E88CF16C87157558380AE2A7559C66E4CC4CEF5E
ark:/67375/TPS-TC3B4HZK-L
ISSN:1932-7447
1932-7455
DOI:10.1021/jp800040s