| Autor: |
Sungun Wi, Yuyan Shao, Grant E. Johnson, Venkateshkumar Prabhakaran, Vaithiyalingam Shutthanandan, Hui Wang, Vijayakumar Murugesan, Karl T. Mueller, Suntharampillai Thevuthasan, Swadipta Roy, Perla B. Balbuena, Kie Hankins |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
The journal of physical chemistry letters. 12(38) |
| ISSN: |
1948-7185 |
| Popis: |
Delineating intricate interactions between highly reactive Li-metal electrodes and the diverse constituents of battery electrolytes has been a long-standing scientific challenge in materials design for advanced energy storage devices. Here, we isolated lithium polysulfide anions (LiS4-) from an electrolyte solution based on their mass-to-charge ratio and deposited them on Li-metal electrodes under clean vacuum conditions using ion soft landing (ISL), a highly controlled interface preparation technique. The molecular level precision in the construction of these model interfaces with ISL, coupled with in situ X-ray photoelectron spectroscopy and ab initio theoretical calculations, allowed us to obtain unprecedented insight into the parasitic reactions of well-defined polysulfides on Li-metal electrodes. Our study revealed that the oxide-rich surface layer, which is amenable to direct electron exchange, drives multielectron sulfur oxidation (S0 → S6+) processes. Our results have substantial implications for the rational design of future Li-S batteries with improved efficiency and durability. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
