Significantly improved electrochemical performance in Li 3V 2(PO 4) 3/C promoted by SiO 2 coating for lithium-ion batteries

Lu Lu Zhang; Gan Liang; Gang Peng; Feng Zou; Yun Hui Huang; Mark C. Croft; Alexander Ignatov

doi:10.1021/jp301127r

Significantly improved electrochemical performance in Li ₃V ₂(PO ₄) ₃/C promoted by SiO ₂ coating for lithium-ion batteries

Lu Lu Zhang, Gan Liang, Gang Peng, Feng Zou, Yun Hui Huang, Mark C. Croft, Alexander Ignatov

School of Arts and Sciences, New High Energy Theory Center

Research output: Contribution to journal › Article › peer-review

127 Scopus citations

Abstract

Li ₃V ₂(PO ₄) ₃/C (LVP/C) coated with various amounts of SiO ₂ has been synthesized, and the effect of surface modification by SiO ₂ on the performance of LVP has been systematically investigated with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), magnetic susceptibility, Raman spectroscopy, and electrochemical measurements. Based on the analysis of XRD, XPS, and TEM, it is confirmed that SiO ₂ coating on the surface of LVP particles does not change the monoclinic structure of LVP. The XAS, XPS, and magnetic susceptibility results indicate that the valence of V in both the pristine and SiO ₂-coated LVP are close to +3. Furthermore, our results reveal that the electrochemical performance of LVP/C can be significantly improved by the SiO ₂ coating, which is due to the enhanced structural stability and reduced charge-transfer resistance.

Original language	English (US)
Pages (from-to)	12401-12408
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	116
Issue number	23
DOIs	https://doi.org/10.1021/jp301127r
State	Published - Jun 14 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Significantly improved electrochemical performance in Li 3V 2(PO 4) 3/C promoted by SiO 2 coating for lithium-ion batteries",

abstract = "Li 3V 2(PO 4) 3/C (LVP/C) coated with various amounts of SiO 2 has been synthesized, and the effect of surface modification by SiO 2 on the performance of LVP has been systematically investigated with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), magnetic susceptibility, Raman spectroscopy, and electrochemical measurements. Based on the analysis of XRD, XPS, and TEM, it is confirmed that SiO 2 coating on the surface of LVP particles does not change the monoclinic structure of LVP. The XAS, XPS, and magnetic susceptibility results indicate that the valence of V in both the pristine and SiO 2-coated LVP are close to +3. Furthermore, our results reveal that the electrochemical performance of LVP/C can be significantly improved by the SiO 2 coating, which is due to the enhanced structural stability and reduced charge-transfer resistance.",

author = "Zhang, {Lu Lu} and Gan Liang and Gang Peng and Feng Zou and Huang, {Yun Hui} and Croft, {Mark C.} and Alexander Ignatov",

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T1 - Significantly improved electrochemical performance in Li 3V 2(PO 4) 3/C promoted by SiO 2 coating for lithium-ion batteries

AU - Zhang, Lu Lu

AU - Liang, Gan

AU - Peng, Gang

AU - Zou, Feng

AU - Huang, Yun Hui

AU - Croft, Mark C.

AU - Ignatov, Alexander

PY - 2012/6/14

Y1 - 2012/6/14

N2 - Li 3V 2(PO 4) 3/C (LVP/C) coated with various amounts of SiO 2 has been synthesized, and the effect of surface modification by SiO 2 on the performance of LVP has been systematically investigated with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), magnetic susceptibility, Raman spectroscopy, and electrochemical measurements. Based on the analysis of XRD, XPS, and TEM, it is confirmed that SiO 2 coating on the surface of LVP particles does not change the monoclinic structure of LVP. The XAS, XPS, and magnetic susceptibility results indicate that the valence of V in both the pristine and SiO 2-coated LVP are close to +3. Furthermore, our results reveal that the electrochemical performance of LVP/C can be significantly improved by the SiO 2 coating, which is due to the enhanced structural stability and reduced charge-transfer resistance.

AB - Li 3V 2(PO 4) 3/C (LVP/C) coated with various amounts of SiO 2 has been synthesized, and the effect of surface modification by SiO 2 on the performance of LVP has been systematically investigated with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), magnetic susceptibility, Raman spectroscopy, and electrochemical measurements. Based on the analysis of XRD, XPS, and TEM, it is confirmed that SiO 2 coating on the surface of LVP particles does not change the monoclinic structure of LVP. The XAS, XPS, and magnetic susceptibility results indicate that the valence of V in both the pristine and SiO 2-coated LVP are close to +3. Furthermore, our results reveal that the electrochemical performance of LVP/C can be significantly improved by the SiO 2 coating, which is due to the enhanced structural stability and reduced charge-transfer resistance.

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Significantly improved electrochemical performance in Li ₃V ₂(PO ₄) ₃/C promoted by SiO ₂ coating for lithium-ion batteries

Abstract

All Science Journal Classification (ASJC) codes

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