| Autor: |
Zhang, Leicheng, Wang, Tianshuai, Chen, Junjie, Wu, Maochun, Zhao, Tianshou |
| Zdroj: |
Journal of Materials Chemistry A; 10/7/2024, Vol. 12 Issue 37, p25407-25415, 9p |
| Abstrakt: |
All-solid-state lithium–sulfur (Li–S) batteries using polyethylene oxide (PEO)-based electrolytes hold the advantages of high theoretical energy density, cost-effectiveness, and high safety. However, the drawback of polysulfide dissolution in PEO results in a short battery lifespan. Here, we propose to construct an artificial cathode-electrolyte interphase (CEI) on the S cathode, which converts the S speciation pathway to a one-step solid transition, significantly mitigating the polysulfide migration in PEO. Surface analyses and theoretical calculations reveal the composition of the CEI and its effect on the reaction mechanism. As a result, the all-solid-state Li–S cell with the artificial CEI is able to deliver 873 mA h g−1 at 100 mA g−1 and maintain 739 mA h g−1 after 50 cycles, whereas the cell using the pristine S cathode retains only 364 mA h g−1. More remarkably, the artificial CEI enables the cell to achieve a high capacity retention rate of 83.1% at 300 mA g−1 over 200 cycles, demonstrating that our strategy of CEI manipulation effectively enhances the cycling reversibility of PEO-based solid-state Li–S batteries. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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