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

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.

LanguageEnglish
Article number013905
Pages013905
JournalApplied Physics Letters
Volume114
Issue number1
DOIs
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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