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Overcharge cycling effect on the surface layers and crystalline structure of LiFePO4 cathodes of Li-ion batteries. / Beletskii, Evgenii V.; Alekseeva, Elena V.; Spiridonova, Dar'ya V.; Yankin, Andrei N.; Levin, Oleg V.

In: Energies, Vol. 12, No. 24, 4652, 07.12.2019.

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

Harvard

Beletskii, EV, Alekseeva, EV, Spiridonova, DV, Yankin, AN & Levin, OV 2019, 'Overcharge cycling effect on the surface layers and crystalline structure of LiFePO4 cathodes of Li-ion batteries', Energies, vol. 12, no. 24, 4652. https://doi.org/10.3390/en12244652

APA

Beletskii, E. V., Alekseeva, E. V., Spiridonova, D. V., Yankin, A. N., & Levin, O. V. (2019). Overcharge cycling effect on the surface layers and crystalline structure of LiFePO4 cathodes of Li-ion batteries. Energies, 12(24), [4652]. https://doi.org/10.3390/en12244652

Vancouver

Beletskii EV, Alekseeva EV, Spiridonova DV, Yankin AN, Levin OV. Overcharge cycling effect on the surface layers and crystalline structure of LiFePO4 cathodes of Li-ion batteries. Energies. 2019 Dec 7;12(24). 4652. https://doi.org/10.3390/en12244652

Author

Beletskii, Evgenii V. ; Alekseeva, Elena V. ; Spiridonova, Dar'ya V. ; Yankin, Andrei N. ; Levin, Oleg V. / Overcharge cycling effect on the surface layers and crystalline structure of LiFePO4 cathodes of Li-ion batteries. In: Energies. 2019 ; Vol. 12, No. 24.

BibTeX

@article{4fc211c7f37e4882a971a3f45d14e04f,
title = "Overcharge cycling effect on the surface layers and crystalline structure of LiFePO4 cathodes of Li-ion batteries",
abstract = "Electrochemical cells using LiFePO4 cathode material are considered one of the safest and most resistant to overcharging among Li-ion batteries. However, if LiFePO4-based electrodes are exposed to high potentials, surface and structural changes may occur in the electrode material. In this study Li/LiFePO4 half-cells were overcharged under different modes with variable cut-off voltages and charge currents. The change in voltage profile, discharge capacity, surface layers composition, and crystalline structure were characterized after overcharge cycles. It was demonstrated that the cathode material is resistant to short-term overcharging up to 5 V, but undergoes irreversible changes with increasing overcharge time or potential. Thus, despite the well-known tolerance of LiFePO4-based batteries to overcharge, a long overcharge time or high cut-off voltage leads to destructive changes in the cathode and should be avoided.",
keywords = "Li-ion batteries, LiFePO, Lithium iron phosphate, Overcharge, SEI layer",
author = "Beletskii, {Evgenii V.} and Alekseeva, {Elena V.} and Spiridonova, {Dar'ya V.} and Yankin, {Andrei N.} and Levin, {Oleg V.}",
year = "2019",
month = dec,
day = "7",
doi = "10.3390/en12244652",
language = "English",
volume = "12",
journal = "Energies",
issn = "1996-1073",
publisher = "MDPI AG",
number = "24",

}

RIS

TY - JOUR

T1 - Overcharge cycling effect on the surface layers and crystalline structure of LiFePO4 cathodes of Li-ion batteries

AU - Beletskii, Evgenii V.

AU - Alekseeva, Elena V.

AU - Spiridonova, Dar'ya V.

AU - Yankin, Andrei N.

AU - Levin, Oleg V.

PY - 2019/12/7

Y1 - 2019/12/7

N2 - Electrochemical cells using LiFePO4 cathode material are considered one of the safest and most resistant to overcharging among Li-ion batteries. However, if LiFePO4-based electrodes are exposed to high potentials, surface and structural changes may occur in the electrode material. In this study Li/LiFePO4 half-cells were overcharged under different modes with variable cut-off voltages and charge currents. The change in voltage profile, discharge capacity, surface layers composition, and crystalline structure were characterized after overcharge cycles. It was demonstrated that the cathode material is resistant to short-term overcharging up to 5 V, but undergoes irreversible changes with increasing overcharge time or potential. Thus, despite the well-known tolerance of LiFePO4-based batteries to overcharge, a long overcharge time or high cut-off voltage leads to destructive changes in the cathode and should be avoided.

AB - Electrochemical cells using LiFePO4 cathode material are considered one of the safest and most resistant to overcharging among Li-ion batteries. However, if LiFePO4-based electrodes are exposed to high potentials, surface and structural changes may occur in the electrode material. In this study Li/LiFePO4 half-cells were overcharged under different modes with variable cut-off voltages and charge currents. The change in voltage profile, discharge capacity, surface layers composition, and crystalline structure were characterized after overcharge cycles. It was demonstrated that the cathode material is resistant to short-term overcharging up to 5 V, but undergoes irreversible changes with increasing overcharge time or potential. Thus, despite the well-known tolerance of LiFePO4-based batteries to overcharge, a long overcharge time or high cut-off voltage leads to destructive changes in the cathode and should be avoided.

KW - Li-ion batteries

KW - LiFePO

KW - Lithium iron phosphate

KW - Overcharge

KW - SEI layer

UR - http://www.scopus.com/inward/record.url?scp=85076802497&partnerID=8YFLogxK

U2 - 10.3390/en12244652

DO - 10.3390/en12244652

M3 - Article

AN - SCOPUS:85076802497

VL - 12

JO - Energies

JF - Energies

SN - 1996-1073

IS - 24

M1 - 4652

ER -

ID: 50069280