Journal article Open Access
Integrated Ring-Chain Design of a New Fluorinated Ether Solvent for High-Voltage Lithium-Metal Batteries
Tianhong Zhou; Yan Zhao; Mario El Kazzi; Jang Wook Choi; Ali Coskun
Ether-based electrolytes offer promising features such as high lithium-ion solvation power and stable interface, yet their limited oxidation stability impedes application in high-voltage Li-metal batteries (LMBs). Whereas the fluorination of the ether backbone improves the oxidative stability, the resulting solvents lose their Li+-solvation ability. Therefore, the rational molecular design of solvents is essential to combine high redox stability with good ionic conductivity. Here, we report the synthesis of a new high-voltage fluorinated ether solvent through integrated ring-chain molecular design, which can be used as a single solvent while retaining high-voltage stability. The controlled Li+-solvation environment even at low-salt-concentration (1 M or 2 M) enables a uniform and compact Li anode and an outstanding cycling stability in the Li|NCM811 full cell (20 μm Li foil, N/P ratio of 4). These results show the impact of molecular design of electrolytes towards the utilization of LMBs.
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| All versions | This version | |
|---|---|---|
| Views | 16 | 16 |
| Downloads | 4 | 4 |
| Data volume | 10.6 MB | 10.6 MB |
| Unique views | 12 | 12 |
| Unique downloads | 4 | 4 |
- Publication date:
- March 10, 2022
- DOI:
-
- License (for files):
- Creative Commons Attribution 4.0 International