Synthesis and electrochemical characterization of high rate capability Li3V2(PO4)3/C prepared by using poly(acrylic acid) and d-(+)-glucose as carbon sources
Submicron-structured Li3V2(PO4)3/C has been synthesized by carbon-thermal reduction method with poly(acrylic acid) and d-(+)-glucose as carbon sources. The pure monoclinic structure of Li3V2(PO4)3/C has been confirmed by XRPD and Rietveld refinement, scanning electron microscopy, and transmission el...
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Published in | Journal of power sources Vol. 275; pp. 792 - 798 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.02.2015
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Subjects | |
Online Access | Get full text |
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Summary: | Submicron-structured Li3V2(PO4)3/C has been synthesized by carbon-thermal reduction method with poly(acrylic acid) and d-(+)-glucose as carbon sources. The pure monoclinic structure of Li3V2(PO4)3/C has been confirmed by XRPD and Rietveld refinement, scanning electron microscopy, and transmission electron microscopy. The specific capacity of Li3V2(PO4)3/C as cathode has been evaluated, between 3.0 and 4.3 V vs Li+/Li, in the two different electrolytes: 1 M solution of LiPF6 in EC:DMC (1:1) at room temperature and in EC:DMC:DEC (1:1:1) at low temperature (0 and −20 °C). Because of the submicron-size dimensions of Li3V2(PO4)3 and of the good carbon coating, the material discharge capacities as high as 103, 98 and 81 mAh g−1 at 40, 60 and 100C rates, retains 93% of the initial discharge capacity after 1000 cycles at 100C. The performances even at low temperature are also good with values of the order of 84, 40, 23, 19 mAh g−1 at 0 °C and 69, 24, 19, 15 mAh g−1 at −20 °C at 3, 7.5, 15, 30 C-rates, respectively.
•Li3V2(PO4)3/C obtained by using poly(acrylic acid) and glucose as carbon sources.•Poly(acrylic acid) is a good dispersing agent to obtain sub-micron particles.•High specific discharge capacity has been obtained at high C-rates.•High cycle stability and long cycle life displayed over 1000 cycles at 100C.•Excellent performances at low temperatures (0, −20 °C) and high C-rates (30C). |
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ISSN: | 0378-7753 1873-2755 |
DOI: | 10.1016/j.jpowsour.2014.11.055 |