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Confined Synthesis of Amorphous Al2O3 Framework Nanocomposites Based on the Oxygen‐Potential Diagram as Sulfur Hosts for Catalytic Conversion.
- Source :
- Advanced Science; Aug2023, Vol. 10 Issue 24, p1-10, 10p
- Publication Year :
- 2023
-
Abstract
- Sulfur cathodes in Li–S batteries suffer significant volumetric expansion and lack of catalytic activity for polysulfide conversion. In this study, a confined self‐reduction synthetic route is developed for preparing nanocomposites using diverse metal ions (Mn2+, Co2+, Ni2+, and Zn2+)‐introduced Al‐MIL‐96 as precursors. The Ni2+‐introduced Al‐MIL‐96‐derived nanocomposite contains a "hardness unit", amorphous aluminum oxide framework, to restrain the volumetric expansion, and a "softness unit", Ni nanocrystals, to improve the catalytic activity. The oxygen‐potential diagram theoretically explains why Ni2+ is preferentially reduced. Postmortem microstructure characterization confirms the suppressive volume expansion. The in situ ultraviolet–visible measurements are performed to probe the catalytic activity of polysulfide conversion. This study provides a new perspective for designing nanocomposites with "hardness units" and "softness units" as sulfur or other catalyst hosts. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21983844
- Volume :
- 10
- Issue :
- 24
- Database :
- Complementary Index
- Journal :
- Advanced Science
- Publication Type :
- Academic Journal
- Accession number :
- 170724811
- Full Text :
- https://doi.org/10.1002/advs.202302215