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A promising sol–gel route based on citric acid to synthesize Li3V2(PO4)3/carbon composite material for lithium ion batteries by Yuzhan Li; Zhen Zhou; Xueping Gao; Jie Yan is a Engineering article available to read on EtoBox.

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Li 3 V 2 (PO 4 ) 3 /carbon composite material was synthesized by a promising sol-gel route based on citric acid using V 2 O 5 powder as a vanadium source. Citric acid acts not only as a chelating reagent but also as a carbon source, which enhance the conductivity of the composite material and hinder the growth of Li 3 V 2 (PO 4 ) 3 particles. The structure and morphology of the sample were characterized by TG, XRD and TEM measurements. XRD results reveal that Li 3 V 2 (PO 4 ) 3 /carbon was successfully synthesized and has a monoclinic structure with space group P2 1 /n. TEM images show Li 3 V 2 (PO 4 ) 3 particles are about 45 nm in diameter embeded in carbon networks. Galvanostatic charge/discharge and cyclic voltammetry measurements were used to study its electrochemical behaviors which indicate the reversibility of the lithium extraction/insertion processes. Li 3 V 2 (PO 4 ) 3 /carbon performed in a voltage window (3.0-4.8 V) exhibits higher discharge capacity, better cycling stability and its discharge capacity maintains about 167.6 mAh/g at a current density of 28 mA/g after 50 cycles.

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Author

Yuzhan Li; Zhen Zhou; Xueping Gao; Jie Yan

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0013-4686)

Published

2007

Language

EN

Field

Engineering (Physical Sciences)