Makale detayı · 2011
Cathode Composites for Li S Batteries via the Use of Oxygenated PorousArchitectures
- Yıl
- 2011
- Tür
- article
Veri kaynağı ayrımı
- YÖKSİS YÖKSİS makale kaydı
- YÖKSİS dergi adı JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- Katalog eşleşmesi (ISSN) Journal of the American Chemical Society
- OpenAlex OpenAlex zenginleştirmesi (özet, atıf, konular)
Özet
OpenAlex · İngilizce
Li-S rechargeable batteries are attractive for electric transportation because of their low cost, environmentally friendliness, and superior energy density. However, the Li-S system has yet to conquer the marketplace, owing to its drawbacks, namely, soluble polysulfide formation. To tackle this issue, we present here a strategy based on the use of a mesoporous chromium trimesate metal-organic framework (MOF) named MIL-100(Cr) as host material for sulfur impregnation. Electrodes containing sulfur impregnated within the pores of the MOF were found to show a marked increase in the capacity retention of Li-S cathodes. Complementary transmission electron microscopy and X-ray photoelectron spectroscopy measurements demonstrated the reversible capture and release of the polysulfides by the pores of MOF during cycling and evidenced a weak binding between the polysulphides and the oxygenated framework. Such an approach was generalized to other mesoporous oxide structures, such as mesoporous silica, for instance SBA-15, having the same positive effect as the MOF on the capacity retention of Li-S cells. Besides pore sizes, the surface activity of the mesoporous additives, as observed for the MOF, appears to also have a pronounced effect on enhancing the cycle performance. Increased knowledge about the interface between polysulfide species and oxide surfaces could lead to novel approaches in the design and fabrication of long cycle life S electrodes.
Konular
Atıflar
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626 atıf
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Yerel katalogda bu makaleye atıf yapan 19 yayın (OpenAlex referans eşleşmesi; tam dünya listesi değildir).
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- An aqueous electrolyte rechargeable Li ion polysulfide battery 2014
- Factors Affecting the Proper Functioning of a 3Ah Li-S Pouch Cell 2017
- Targeting the role of lithium sulphide formation for the rapid capacity fading in lithium sulphur batteries 2015
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