Charging-induced defect formation in LixCoO2 battery cathodes studied by positron annihilation spectroscopy

Peter Parz; Bernd Fuchsbichler; Stefan Koller; Brigitte Bitschnau; Franz-Andreas Mautner; Werner Puff; Roland Würschum

doi:10.1063/1.4801998

Charging-induced defect formation in LixCoO2 battery cathodes studied by positron annihilation spectroscopy

Peter Parz^*, Bernd Fuchsbichler, Stefan Koller, Brigitte Bitschnau, Franz-Andreas Mautner, Werner Puff, Roland Würschum

^*Corresponding author for this work

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

Abstract

Charging-induced formation of vacancy-type defects in LixCoO2 battery cathodes was studied by the defect-specific techniques of positron lifetime spectroscopy and Doppler broadening of positron–electron annihilation radiation. The regime of reversible charging is dominated by vacancy-type defects on the Li+-sublattice the size of which increases with increasing Li+-extraction. Indication is found that Li+-reordering which occurs at the limit of reversible Li+-extraction (x = 0.55) causes a transition from two-dimensional agglomerates into one-dimensional vacancy chains. Degradation upon further Li+-extraction is accompanied by the formation of vacancy complexes on the Co- and anion sublattice.

Original language	English
Article number	151901
Journal	Applied Physics Letters
Volume	102
DOIs	https://doi.org/10.1063/1.4801998
Publication status	Published - 2013

Fields of Expertise

Advanced Materials Science

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10.1063/1.4801998

Battery materials: Structure and charging processes
Klinser, G. & Würschum, R.
1/01/13 → …
Project: Research project
Atomic defects in metals and metals oxides
Sprengel, W., Würschum, R., Klinser, G. & Resch, L.
1/01/12 → …
Project: Research project
FoE Advanced Materials Science
Djuric, D., Sommitsch, C., Mayr, P., Radis, R., Mendez Martin, F., Enzinger, N., Kuduzovic, A., Schlacher, C., Vallant, R., Sonderegger, B., Pein, C., Krumphals, A. & Krumphals, F.
1/10/08 → 31/12/24
Project: Research area

Cite this

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title = "Charging-induced defect formation in LixCoO2 battery cathodes studied by positron annihilation spectroscopy",

abstract = "Charging-induced formation of vacancy-type defects in LixCoO2 battery cathodes was studied by the defect-specific techniques of positron lifetime spectroscopy and Doppler broadening of positron–electron annihilation radiation. The regime of reversible charging is dominated by vacancy-type defects on the Li+-sublattice the size of which increases with increasing Li+-extraction. Indication is found that Li+-reordering which occurs at the limit of reversible Li+-extraction (x = 0.55) causes a transition from two-dimensional agglomerates into one-dimensional vacancy chains. Degradation upon further Li+-extraction is accompanied by the formation of vacancy complexes on the Co- and anion sublattice.",

author = "Peter Parz and Bernd Fuchsbichler and Stefan Koller and Brigitte Bitschnau and Franz-Andreas Mautner and Werner Puff and Roland W{\"u}rschum",

year = "2013",

doi = "10.1063/1.4801998",

language = "English",

volume = "102",

journal = "Applied Physics Letters",

issn = "1077-3118 ",

publisher = "American Institute of Physics Publising LLC",

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TY - JOUR

T1 - Charging-induced defect formation in LixCoO2 battery cathodes studied by positron annihilation spectroscopy

AU - Parz, Peter

AU - Fuchsbichler, Bernd

AU - Koller, Stefan

AU - Bitschnau, Brigitte

AU - Mautner, Franz-Andreas

AU - Puff, Werner

AU - Würschum, Roland

PY - 2013

Y1 - 2013

N2 - Charging-induced formation of vacancy-type defects in LixCoO2 battery cathodes was studied by the defect-specific techniques of positron lifetime spectroscopy and Doppler broadening of positron–electron annihilation radiation. The regime of reversible charging is dominated by vacancy-type defects on the Li+-sublattice the size of which increases with increasing Li+-extraction. Indication is found that Li+-reordering which occurs at the limit of reversible Li+-extraction (x = 0.55) causes a transition from two-dimensional agglomerates into one-dimensional vacancy chains. Degradation upon further Li+-extraction is accompanied by the formation of vacancy complexes on the Co- and anion sublattice.

AB - Charging-induced formation of vacancy-type defects in LixCoO2 battery cathodes was studied by the defect-specific techniques of positron lifetime spectroscopy and Doppler broadening of positron–electron annihilation radiation. The regime of reversible charging is dominated by vacancy-type defects on the Li+-sublattice the size of which increases with increasing Li+-extraction. Indication is found that Li+-reordering which occurs at the limit of reversible Li+-extraction (x = 0.55) causes a transition from two-dimensional agglomerates into one-dimensional vacancy chains. Degradation upon further Li+-extraction is accompanied by the formation of vacancy complexes on the Co- and anion sublattice.

U2 - 10.1063/1.4801998

DO - 10.1063/1.4801998

M3 - Article

SN - 1077-3118

VL - 102

JO - Applied Physics Letters

JF - Applied Physics Letters

M1 - 151901

ER -

Charging-induced defect formation in LixCoO2 battery cathodes studied by positron annihilation spectroscopy

Abstract

Fields of Expertise

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Projects

Battery materials: Structure and charging processes

Atomic defects in metals and metals oxides

FoE Advanced Materials Science

Cite this