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Dendrite-Free Dual-Phase Li-Ba Alloy Anode Enabled by Ordered Array of Built-in Mixed Conducting Microchannels.
- Source :
-
Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Apr; Vol. 20 (14), pp. e2308279. Date of Electronic Publication: 2023 Nov 21. - Publication Year :
- 2024
-
Abstract
- The development and application of lithium (Li) anode is hindered by volumetric variation, dendritic Li growth, and parasitic reactions. Herein, a dual-phase Li-barium (Ba) alloy with self-assembled microchannels array is synthesized through a one-step thermal fusion method to investigate the inhibition effect of lithiophilic composite porous array on Li dendrites. The Li-rich Li-Ba alloy (BaLi24) as composite Li electrode exhibits an ordered porous structure of BaLi <subscript>4</subscript> intermetallic compound after delithiation, which acts as a built-in 3D current collector during Li plating/striping process. Furthermore, the lithiophilic BaLi <subscript>4</subscript> alloy scaffold is a mixed conductor, featuring with Li <superscript>+</superscript> ions diffusion capability, which can efficiently transport the reduced Li to the interior of the electrode structure. This unique top-down growth mode can effectively prohibit Li dendrites growth and improve the space utilization of 3D electrode structure. The spin-polarized density functional theory (DFT) calculations suggest that the absorption capability of BaLi <subscript>4</subscript> benefits the deposition of Li metal. As a result, the cell performance with the dual-phase Li-Ba alloy anode is significantly improved.<br /> (© 2023 Wiley‐VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1613-6829
- Volume :
- 20
- Issue :
- 14
- Database :
- MEDLINE
- Journal :
- Small (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 37990369
- Full Text :
- https://doi.org/10.1002/smll.202308279