Insight into Fe incorporation in Li3V2(PO 4)3/C cathode material

Lu Lu Zhang; Gan Liang; Gang Peng; Yun Hui Huang; Long Wang; Long Qie; Mark C. Croft; Alexander Ignatov; John B. Goodenough

doi:10.1149/2.001210jes

Insight into Fe incorporation in Li₃V₂(PO ₄)₃/C cathode material

Lu Lu Zhang, Gan Liang, Gang Peng, Yun Hui Huang, Long Wang, Long Qie, Mark C. Croft, Alexander Ignatov, John B. Goodenough

School of Arts and Sciences, Physics & Astronomy

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

45 Scopus citations

Abstract

The profile of Fe-incorporation into carbon-coated Li₃V ₂(PO₄)₃ (LVP) cathode material for lithium ion batteries has been systematically investigated with X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectrometry and electrochemical measurements. The results confirm the coexistence of Li_3+xV_2-yFe_2+y(PO ₄)₃, LiFePO₄ and FePO₄ in the Fe-incorporated LVP/C composite. The FePO₄ appears to be present as an amorphous phase associated with the carbon coat. Compared with pristine LVP/C, significant improvement in capacity, cycling stability, and rate capability in LVP/C-Fe were achieved, which is attributed to the reduced particle size, a decreased electrolyte/electrode charge-transfer resistance, and a suppressed electrolyte/electrode reaction at high voltage.

Original language	English (US)
Pages (from-to)	A1573-A1578
Journal	Journal of the Electrochemical Society
Volume	159
Issue number	10
DOIs	https://doi.org/10.1149/2.001210jes
State	Published - 2012

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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10.1149/2.001210jes

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title = "Insight into Fe incorporation in Li3V2(PO 4)3/C cathode material",

abstract = "The profile of Fe-incorporation into carbon-coated Li3V 2(PO4)3 (LVP) cathode material for lithium ion batteries has been systematically investigated with X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectrometry and electrochemical measurements. The results confirm the coexistence of Li3+xV2-yFe2+y(PO 4)3, LiFePO4 and FePO4 in the Fe-incorporated LVP/C composite. The FePO4 appears to be present as an amorphous phase associated with the carbon coat. Compared with pristine LVP/C, significant improvement in capacity, cycling stability, and rate capability in LVP/C-Fe were achieved, which is attributed to the reduced particle size, a decreased electrolyte/electrode charge-transfer resistance, and a suppressed electrolyte/electrode reaction at high voltage.",

author = "Zhang, {Lu Lu} and Gan Liang and Gang Peng and Huang, {Yun Hui} and Long Wang and Long Qie and Croft, {Mark C.} and Alexander Ignatov and Goodenough, {John B.}",

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T1 - Insight into Fe incorporation in Li3V2(PO 4)3/C cathode material

AU - Zhang, Lu Lu

AU - Liang, Gan

AU - Peng, Gang

AU - Huang, Yun Hui

AU - Wang, Long

AU - Qie, Long

AU - Croft, Mark C.

AU - Ignatov, Alexander

AU - Goodenough, John B.

PY - 2012

Y1 - 2012

N2 - The profile of Fe-incorporation into carbon-coated Li3V 2(PO4)3 (LVP) cathode material for lithium ion batteries has been systematically investigated with X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectrometry and electrochemical measurements. The results confirm the coexistence of Li3+xV2-yFe2+y(PO 4)3, LiFePO4 and FePO4 in the Fe-incorporated LVP/C composite. The FePO4 appears to be present as an amorphous phase associated with the carbon coat. Compared with pristine LVP/C, significant improvement in capacity, cycling stability, and rate capability in LVP/C-Fe were achieved, which is attributed to the reduced particle size, a decreased electrolyte/electrode charge-transfer resistance, and a suppressed electrolyte/electrode reaction at high voltage.

AB - The profile of Fe-incorporation into carbon-coated Li3V 2(PO4)3 (LVP) cathode material for lithium ion batteries has been systematically investigated with X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectrometry and electrochemical measurements. The results confirm the coexistence of Li3+xV2-yFe2+y(PO 4)3, LiFePO4 and FePO4 in the Fe-incorporated LVP/C composite. The FePO4 appears to be present as an amorphous phase associated with the carbon coat. Compared with pristine LVP/C, significant improvement in capacity, cycling stability, and rate capability in LVP/C-Fe were achieved, which is attributed to the reduced particle size, a decreased electrolyte/electrode charge-transfer resistance, and a suppressed electrolyte/electrode reaction at high voltage.

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Insight into Fe incorporation in Li₃V₂(PO ₄)₃/C cathode material

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