Strong Lewis Acid Effect in the Pores of Metal-Organic Framework Host for Dendrite-Free Lithium Deposition and Stripping
© 2025 Wiley‐VCH GmbH.
| Veröffentlicht in: | Advanced materials (Deerfield Beach, Fla.). - 1998. - (2025) vom: 01. Aug., Seite e07827 |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2025
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| Zugriff auf das übergeordnete Werk: | Advanced materials (Deerfield Beach, Fla.) |
| Schlagworte: | Journal Article Li‐metal anode Li‐metal batteries dendrite‐free lithium deposition metal–organic framework strong Lewis acid effect |
| Zusammenfassung: | © 2025 Wiley‐VCH GmbH. The homogeneous introduction of Lewis acid sites into 3D hosts of Li-metal batteries (LMBs) is crucial for promoting Li+ dissociation and desolvation. Herein, the use of MIL-101, a well-known flexible metal-organic framework, loaded with uniformly distributed AlFx species with unsaturated Lewis acid sites, is proposed as a Li-metal anode (LMA) 3D host to promote Li+ dissociation and desolvation in LMBs. A symmetrical cell using an AlFxMIL-101/Cu with pre-deposited lithium (Li@AlFx@MIL-101/Cu) exhibits stable performance for over 3600 h. In addition, a high-loading LFP||Li@AlFx@MIL-101/Cu full cell maintains high capacity after 4000 cycles at 1 C with an average coulombic efficiency of 99.87%. Experimental and theoretical analyses reveal that the AlFx species with strong Lewis acidity and MIL-101 with nanospace confinement effect promote Li+ dissociation and desolvation coupled with fast and uniform Li+ transport. The MIL-101 pores accommodate Li species, thereby inhibiting volume changes in the LMA. These results demonstrate that AlFx@MIL-101 ensures uniform and dendrite-free Li deposition on LMAs, making it a promising host for high-stability LMBs |
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| Beschreibung: | Date Revised 02.08.2025 published: Print-Electronic Citation Status Publisher |
| ISSN: | 1521-4095 |
| DOI: | 10.1002/adma.202507827 |