Enhancement of the cycling performance of Li3V 2(PO4)3/C by stabilizing the crystal structure through Zn2+ doping

Wenhui Wang; Jiaolong Zhang; Zheng Jia; Changsong Dai; Yongfeng Hu; Jigang Zhou; Qunfeng Xiao

doi:10.1039/c3cp55495c

Enhancement of the cycling performance of Li₃V ₂(PO₄)₃/C by stabilizing the crystal structure through Zn²⁺ doping

Wenhui Wang
, Jiaolong Zhang
, Zheng Jia
, Changsong Dai^*
, Yongfeng Hu
, Jigang Zhou
, Qunfeng Xiao

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
University of Saskatchewan

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

24 Scopus citations

Abstract

A series of Li₃V_2-2/3xZn_x(PO ₄)₃/C phases were synthesized by carbon thermal reduction assisted by the ball-mill process. Scanning electron microscopy (SEM) showed that the irregular morphology of the pristine Li₃V ₂(PO₄)₃/C could be transformed to spherical upon doping with a suitable amount of zinc. The structural stability of the pristine and the Zn doped Li₃V₂(PO₄) ₃/C were investigated via X-ray absorption near edge structure (XANES) spectroscopy and X-ray diffraction (XRD). The results revealed that Zn doping not only improves the stability of the VO₆ octahedral structures before electrochemical cycling, but also reduces the degree of irreversible expansion of the c axis and the crystal volume upon repeated cycles. Among the Li₃V_2-2/3xZn_x(PO ₄)₃/C (0 ≤ x ≤ 0.15) series, the sample doped with 0.05 Zn atoms per formula unit showed the best electrochemical performance. Excess Zn doping (x > 0.05) didn't result in further improvement in the electrochemical performance due to the segregation effect and the inactive nature of Zn. This journal is

Original language	English
Pages (from-to)	13858-13865
Number of pages	8
Journal	Physical Chemistry Chemical Physics
Volume	16
Issue number	27
DOIs	https://doi.org/10.1039/c3cp55495c
State	Published - 21 Jul 2014
Externally published	Yes

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title = "Enhancement of the cycling performance of Li3V 2(PO4)3/C by stabilizing the crystal structure through Zn2+ doping",

abstract = "A series of Li3V2-2/3xZnx(PO 4)3/C phases were synthesized by carbon thermal reduction assisted by the ball-mill process. Scanning electron microscopy (SEM) showed that the irregular morphology of the pristine Li3V 2(PO4)3/C could be transformed to spherical upon doping with a suitable amount of zinc. The structural stability of the pristine and the Zn doped Li3V2(PO4) 3/C were investigated via X-ray absorption near edge structure (XANES) spectroscopy and X-ray diffraction (XRD). The results revealed that Zn doping not only improves the stability of the VO6 octahedral structures before electrochemical cycling, but also reduces the degree of irreversible expansion of the c axis and the crystal volume upon repeated cycles. Among the Li3V2-2/3xZnx(PO 4)3/C (0 ≤ x ≤ 0.15) series, the sample doped with 0.05 Zn atoms per formula unit showed the best electrochemical performance. Excess Zn doping (x > 0.05) didn't result in further improvement in the electrochemical performance due to the segregation effect and the inactive nature of Zn. This journal is",

author = "Wenhui Wang and Jiaolong Zhang and Zheng Jia and Changsong Dai and Yongfeng Hu and Jigang Zhou and Qunfeng Xiao",

year = "2014",

month = jul,

day = "21",

doi = "10.1039/c3cp55495c",

language = "英语",

volume = "16",

pages = "13858--13865",

journal = "Physical Chemistry Chemical Physics",

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T1 - Enhancement of the cycling performance of Li3V 2(PO4)3/C by stabilizing the crystal structure through Zn2+ doping

AU - Wang, Wenhui

AU - Zhang, Jiaolong

AU - Jia, Zheng

AU - Dai, Changsong

AU - Hu, Yongfeng

AU - Zhou, Jigang

AU - Xiao, Qunfeng

PY - 2014/7/21

Y1 - 2014/7/21

N2 - A series of Li3V2-2/3xZnx(PO 4)3/C phases were synthesized by carbon thermal reduction assisted by the ball-mill process. Scanning electron microscopy (SEM) showed that the irregular morphology of the pristine Li3V 2(PO4)3/C could be transformed to spherical upon doping with a suitable amount of zinc. The structural stability of the pristine and the Zn doped Li3V2(PO4) 3/C were investigated via X-ray absorption near edge structure (XANES) spectroscopy and X-ray diffraction (XRD). The results revealed that Zn doping not only improves the stability of the VO6 octahedral structures before electrochemical cycling, but also reduces the degree of irreversible expansion of the c axis and the crystal volume upon repeated cycles. Among the Li3V2-2/3xZnx(PO 4)3/C (0 ≤ x ≤ 0.15) series, the sample doped with 0.05 Zn atoms per formula unit showed the best electrochemical performance. Excess Zn doping (x > 0.05) didn't result in further improvement in the electrochemical performance due to the segregation effect and the inactive nature of Zn. This journal is

AB - A series of Li3V2-2/3xZnx(PO 4)3/C phases were synthesized by carbon thermal reduction assisted by the ball-mill process. Scanning electron microscopy (SEM) showed that the irregular morphology of the pristine Li3V 2(PO4)3/C could be transformed to spherical upon doping with a suitable amount of zinc. The structural stability of the pristine and the Zn doped Li3V2(PO4) 3/C were investigated via X-ray absorption near edge structure (XANES) spectroscopy and X-ray diffraction (XRD). The results revealed that Zn doping not only improves the stability of the VO6 octahedral structures before electrochemical cycling, but also reduces the degree of irreversible expansion of the c axis and the crystal volume upon repeated cycles. Among the Li3V2-2/3xZnx(PO 4)3/C (0 ≤ x ≤ 0.15) series, the sample doped with 0.05 Zn atoms per formula unit showed the best electrochemical performance. Excess Zn doping (x > 0.05) didn't result in further improvement in the electrochemical performance due to the segregation effect and the inactive nature of Zn. This journal is

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U2 - 10.1039/c3cp55495c

DO - 10.1039/c3cp55495c

M3 - 文章

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SN - 1463-9076

VL - 16

SP - 13858

EP - 13865

JO - Physical Chemistry Chemical Physics

JF - Physical Chemistry Chemical Physics

IS - 27

ER -

Enhancement of the cycling performance of Li₃V ₂(PO₄)₃/C by stabilizing the crystal structure through Zn²⁺ doping

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