Li-storage in LiFe1/4Mn1/4Co1/4Ni1/4PO4 solid solution

X. J. Wang; X. Q. Yu; H. Li; X. Q. Yang; J. McBreen; X. J. Huang

doi:10.1016/j.elecom.2008.07.010

Li-storage in LiFe_1/4Mn_1/4Co_1/4Ni_1/4PO₄ solid solution

X. J. Wang, X. Q. Yu, H. Li, X. Q. Yang, J. McBreen, X. J. Huang

Biochemistry, Chemistry, & Physics

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

46 Scopus citations

Abstract

Olivine structured LiFe_1/4Mn_1/4Co_1/4Ni_1/4PO₄ in pure solid solution single phase was obtained using solid-state reaction. For the carbon-coated material, in a voltage range of 3.0-5.1 V (vs. Li/Li⁺), three voltage plateaus were observed clearly in both galvanostatic discharging and galvanostatic intermittent titration technique (GITT) curves. These three plateaus are corresponding to Co³⁺/Co²⁺, Mn³⁺/Mn²⁺ and Fe³⁺/Fe²⁺ redox couples. No definite plateau can be assigned to Ni³⁺/Ni²⁺ redox couple in this voltage range. The overpotentials show the maximum when the redox reaction shifts from one redox couple to another couple. The apparent chemical diffusion coefficients of lithium (over(D, ̃)_Li) are in the same order of magnitude 10^-15 cm² s^-1 for all transition reactions.

Original language	English
Pages (from-to)	1347-1350
Number of pages	4
Journal	Electrochemistry Communications
Volume	10
Issue number	9
DOIs	https://doi.org/10.1016/j.elecom.2008.07.010
State	Published - Sep 2008

Keywords

Chemical diffusion coefficient
GITT
LiFeMnCoNiPO
Lithium ion batteries
Voltage relaxation technique

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10.1016/j.elecom.2008.07.010

Cite this

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title = "Li-storage in LiFe1/4Mn1/4Co1/4Ni1/4PO4 solid solution",

abstract = "Olivine structured LiFe1/4Mn1/4Co1/4Ni1/4PO4 in pure solid solution single phase was obtained using solid-state reaction. For the carbon-coated material, in a voltage range of 3.0-5.1 V (vs. Li/Li+), three voltage plateaus were observed clearly in both galvanostatic discharging and galvanostatic intermittent titration technique (GITT) curves. These three plateaus are corresponding to Co3+/Co2+, Mn3+/Mn2+ and Fe3+/Fe2+ redox couples. No definite plateau can be assigned to Ni3+/Ni2+ redox couple in this voltage range. The overpotentials show the maximum when the redox reaction shifts from one redox couple to another couple. The apparent chemical diffusion coefficients of lithium (over(D,{\~ })Li) are in the same order of magnitude 10-15 cm2 s-1 for all transition reactions.",

keywords = "Chemical diffusion coefficient, GITT, LiFeMnCoNiPO, Lithium ion batteries, Voltage relaxation technique",

author = "Wang, {X. J.} and Yu, {X. Q.} and H. Li and Yang, {X. Q.} and J. McBreen and Huang, {X. J.}",

year = "2008",

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doi = "10.1016/j.elecom.2008.07.010",

language = "English",

volume = "10",

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T1 - Li-storage in LiFe1/4Mn1/4Co1/4Ni1/4PO4 solid solution

AU - Wang, X. J.

AU - Yu, X. Q.

AU - Li, H.

AU - Yang, X. Q.

AU - McBreen, J.

AU - Huang, X. J.

PY - 2008/9

Y1 - 2008/9

N2 - Olivine structured LiFe1/4Mn1/4Co1/4Ni1/4PO4 in pure solid solution single phase was obtained using solid-state reaction. For the carbon-coated material, in a voltage range of 3.0-5.1 V (vs. Li/Li+), three voltage plateaus were observed clearly in both galvanostatic discharging and galvanostatic intermittent titration technique (GITT) curves. These three plateaus are corresponding to Co3+/Co2+, Mn3+/Mn2+ and Fe3+/Fe2+ redox couples. No definite plateau can be assigned to Ni3+/Ni2+ redox couple in this voltage range. The overpotentials show the maximum when the redox reaction shifts from one redox couple to another couple. The apparent chemical diffusion coefficients of lithium (over(D, ̃)Li) are in the same order of magnitude 10-15 cm2 s-1 for all transition reactions.

AB - Olivine structured LiFe1/4Mn1/4Co1/4Ni1/4PO4 in pure solid solution single phase was obtained using solid-state reaction. For the carbon-coated material, in a voltage range of 3.0-5.1 V (vs. Li/Li+), three voltage plateaus were observed clearly in both galvanostatic discharging and galvanostatic intermittent titration technique (GITT) curves. These three plateaus are corresponding to Co3+/Co2+, Mn3+/Mn2+ and Fe3+/Fe2+ redox couples. No definite plateau can be assigned to Ni3+/Ni2+ redox couple in this voltage range. The overpotentials show the maximum when the redox reaction shifts from one redox couple to another couple. The apparent chemical diffusion coefficients of lithium (over(D, ̃)Li) are in the same order of magnitude 10-15 cm2 s-1 for all transition reactions.

KW - Chemical diffusion coefficient

KW - GITT

KW - LiFeMnCoNiPO

KW - Lithium ion batteries

KW - Voltage relaxation technique

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