Operando transmission electron microscopy of battery cycling: thickness dependent breaking of TiO2 coating on Si/SiO2 nanoparticles.
Chem Commun (Camb)
; 58(19): 3130-3133, 2022 Mar 03.
Article
em En
| MEDLINE
| ID: mdl-35129189
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 (â¼5 nm) coatings, which corroborates the difference in their capacities.
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MEDLINE
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En
Ano de publicação:
2022
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Article