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Unveiling the Role of PEO-Capped TiO2 Nanofiller in Stabilizing the Anode Interface in Lithium Metal Batteries.

ABSTRACT: Lithium metal batteries (LMBs) will be a breakthrough in automotive applications, but they require the development of next-generation solid-state electrolytes (SSEs) to stabilize the anode interface. Polymer-in-ceramic PEO/TiO2 nanocomposite SSEs show outstanding properties, allowing unprecedented LMBs durability and self-healing capabilities. However, the mechanism underlying the inhibition/delay of dendrite growth is not well understood. In fact, the inorganic phase could act as both a chemical and a mechanical barrier to dendrite propagation. Combining advanced in situ and ex situ experimental techniques, we demonstrate that oligo(ethylene oxide)-capped TiO2, although chemically inert toward lithium metal, imparts SSE with mechanical and dynamical properties particularly favorable for application. The self-healing characteristics are due to the interplay between mechanical robustness and high local polymer mobility which promotes the disruption of the electric continuity of the lithium dendrites (razor effect).

SUBMITTER: Mezzomo L 

PROVIDER: S-EPMC9650764 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Unveiling the Role of PEO-Capped TiO<sub>2</sub> Nanofiller in Stabilizing the Anode Interface in Lithium Metal Batteries.

Mezzomo Lorenzo L   Lorenzi Roberto R   Mauri Michele M   Simonutti Roberto R   D'Arienzo Massimiliano M   D'Arienzo Massimiliano M   Wi Tae-Ung TU   Ko Sangho S   Lee Hyun-Wook HW   Poggini Lorenzo L   Caneschi Andrea A   Mustarelli Piercarlo P   Ruffo Riccardo R  

Nano letters 20221031 21

Lithium metal batteries (LMBs) will be a breakthrough in automotive applications, but they require the development of next-generation solid-state electrolytes (SSEs) to stabilize the anode interface. Polymer-in-ceramic PEO/TiO<sub>2</sub> nanocomposite SSEs show outstanding properties, allowing unprecedented LMBs durability and self-healing capabilities. However, the mechanism underlying the inhibition/delay of dendrite growth is not well understood. In fact, the inorganic phase could act as bot  ...[more]

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