Operando monitoring of charging-induced defect formation in battery electrodes by positrons

Gregor Klinser, Harald Krenn, Stefan Koller, Roland Würschum

Research output: Contribution to journalArticleResearchpeer-review

Abstract

The defect specific technique of positron-electron annihilation is utilized in an appropriate electrochemical cell for operando monitoring of vacancy-type defect formation which occurs in battery electrodes upon charging, using the cathode material LiNi 1/3 Mn 1/3 Co 1/3 O 2 as a case study. The variation of the positron lifetime with charging-induced Li ion extraction indicates the formation of divacancies and vacancy agglomerates in a progressive amount as well as a reordering of vacancy agglomerates to one-dimensional vacancy chains at the end of charging. A remarkable correlation of the charging-induced variation of the positron lifetime with that of Li ion diffusion data in the literature has been found.

Original languageEnglish
Article number013905
Pages (from-to)013905
JournalApplied Physics Letters
Volume114
Issue number1
DOIs
Publication statusPublished - 2019

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charging
electric batteries
positrons
electrodes
defects
ion extraction
life (durability)
electrochemical cells
positron annihilation
cathodes
ions

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Fields of Expertise

  • Advanced Materials Science

Cite this

Operando monitoring of charging-induced defect formation in battery electrodes by positrons. / Klinser, Gregor; Krenn, Harald; Koller, Stefan; Würschum, Roland.

In: Applied Physics Letters, Vol. 114, No. 1, 013905, 2019, p. 013905.

Research output: Contribution to journalArticleResearchpeer-review

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