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
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 → …
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

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Projects

Battery materials: Structure and charging processes

Atomic defects in metals and metals oxides

Advanced Materials Science

Cite this