التفاصيل البيبلوغرافية
| العنوان: |
Interfacial solvation-structure regulation for stable Li metal anode by a desolvation coating technique. |
| المؤلفون: |
Guo-Xing Li, Lennartz, Peter, Koverga, Volodymyr, Rong Kou, Au Nguyen, Heng Jiang, Meng Liao, Daiwei Wang, Dandu, Naveen, Zepeda, Michael, Haiying Wang, Ke Wang, Anh T. Ngo, Brunklaus, Gunther, Donghai Wang |
| المصدر: |
Proceedings of the National Academy of Sciences of the United States of America; 1/23/2024, Vol. 121 Issue 4, p1-10, 61p |
| مصطلحات موضوعية: |
DESOLVATION, SOLID electrolytes, ANODES, METALS, SURFACE coatings |
| مستخلص: |
Rechargeable lithium (Li) metal batteries face challenges in achieving stable cycling due to the instability of the solid electrolyte interphase (SEI). The Li-ion solvation structure and its desolvation process are crucial for the formation of a stable SEI on Li metal anodes and improving Li plating/stripping kinetics. This research introduces an interfacial desolvation coating technique to actively modulate the Li-ion solvation structure at the Li metal interface and regulate the participation of the electrolyte solvent in SEI formation. Through experimental investigations conducted using a carbonate electrolyte with limited compatibility to Li metal, the optimized desolvation coating layer, composed of 12-crown-4 ether-modified silica materials, selectively displaces strongly coordinating solvents while simultaneously enriching weakly coordinating fluorinated solvents at the Li metal/electrolyte interface. This selective desolvation and enrichment effect reduce solvent participation to SEI and thus facilitate the formation of a LiF-dominant SEI with greatly reduced organic species on the Li metal surface, as conclusively verified through various characterization techniques including XPS, quantitative NMR, operando NMR, cryo-TEM, EELS, and EDS. The interfacial desolvation coating technique enables excellent rate cycling stability (i.e., 1C) of the Li metal anode and prolonged cycling life of the Li,,LiCoO2 pouch cell in the conventional carbonate electrolyte (E/C 2.6 g/Ah), with 80% capacity retention after 333 cycles. [ABSTRACT FROM AUTHOR] |
|
Copyright of Proceedings of the National Academy of Sciences of the United States of America is the property of National Academy of Sciences and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
