Operando transmission electron microscopy of battery cycling: thickness dependent breaking of TiO2 coating on Si/SiO2 nanoparticles

Shibabrata Basak, Amir H. Tavabi, Krzysztof Dzieciol, Vadim Migunov, Violetta Arszelewska, Hermann Tempel, Hans Kungl, Erik M. Kelder, Marnix Wagemaker, More Authors

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Conformal coating of silicon (Si) anode particles is a common strategy for improving their mechanical integrity, to mitigate battery capacity fading due to particle volume expansion, which can result in particle crumbling due to lithiation induced strain and excessive solid-electrolyte interface formation. Here, we use operando transmission electron microscopy in an open cell to show that TiO2 coatings on Si/SiO2 particles undergo thickness dependent rupture on battery cycling where thicker coatings crumble more readily than thinner (∼5 nm) coatings, which corroborates the difference in their capacities.

Original languageEnglish
Pages (from-to)3130-3133
JournalChemical communications (Cambridge, England)
Volume58
Issue number19
DOIs
Publication statusPublished - 2022

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