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231226s2024 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202306462
|2 doi
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|a pubmed24n1294.xml
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|a (DE-627)NLM365046841
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|a (NLM)38013502
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|a DE-627
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|a eng
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|a Xu, Jijian
|e verfasserin
|4 aut
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|a Revealing the Anion-Solvent Interaction for Ultralow Temperature Lithium Metal Batteries
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|c 2024
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|a Text
|b txt
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 15.02.2024
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 Wiley-VCH GmbH.
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|a Anion solvation in electrolytes can largely change the electrochemical performance of the electrolytes, yet has been rarely investigated. Herein, three anions of bis(trifluoromethanesulfonyl)imide (TFSI), bis(fluorosulfonyl)imide (FSI), and derived asymmetric (fluorosulfonyl)(trifluoro-methanesulfonyl)imide (FTFSI) are systematically examined in a weakly Li+ cation solvating solvent of bis(3-fluoropropyl)ether (BFPE). In-situ liquid secondary ion mass spectrometry demonstrates that FTFSI- and FSI- anions are associated with BFPE solvent, while weak TFSI- /BFPE cluster signals are detected. Molecular modeling further reveals that the anion-solvent interaction is accompanied by the formation of H-bonding-like interactions. Anion solvation enhances the Li+ cation transfer number and reduces the organic component in solid electrolyte interphase, which enhances the Li plating/stripping Coulombic efficiency at a low temperature of -30 °C from 42.4% in TFSI-based electrolytes to 98.7% in 1.5 m LiFTFSI and 97.9% in LiFSI-BFPE electrolytes. The anion-solvent interactions, especially asymmetric anion solvation also accelerate the Li+ desolvation kinetics. The 1.5 m LiFTFSI-BFPE electrolyte with strong anion-solvent interaction enables LiNi0.8 Mn0.1 Co0.1 O2 (NMC811)||Li (20 µm) full cell with stable cyclability even under -40 °C, retaining over 92% of initial capacity (115 mAh g-1 , after 100 cycles). The anion-solvent interactions insights allow to rational design the electrolyte for lithium metal batteries and beyond to achieve high performance
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|a Journal Article
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|a Anion solvation
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|a Li metal batteries
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|a asymmetric
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|a electrolyte design
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|a low temperature
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|a Koverga, Volodymyr
|e verfasserin
|4 aut
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|a Phan, An
|e verfasserin
|4 aut
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|a Min Li, Ai
|e verfasserin
|4 aut
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|a Zhang, Nan
|e verfasserin
|4 aut
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|a Baek, Minsung
|e verfasserin
|4 aut
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|a Jayawardana, Chamithri
|e verfasserin
|4 aut
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|a Lucht, Brett L
|e verfasserin
|4 aut
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|a Ngo, Anh T
|e verfasserin
|4 aut
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|a Wang, Chunsheng
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g 36(2024), 7 vom: 27. Feb., Seite e2306462
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnns
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| 773 |
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|g volume:36
|g year:2024
|g number:7
|g day:27
|g month:02
|g pages:e2306462
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|u http://dx.doi.org/10.1002/adma.202306462
|3 Volltext
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