Enhanced rate capability due to highly active Ta2O5 catalysts for lithium sulfur batteries

Cited 0 time in webofscience Cited 0 time in scopus
  • Hit : 35
  • Download : 0
The heterogeneous catalysis is widely recognized to promote polysulfide fragmentations can play a key role for the rate capability enhancement of lithium sulfur batteries (LSB). In this study, we report the most active catalysts (Ta2O5) for LSB which showed an enhanced rate capability (914 mAh g(-1) at 5 C) in comparison with the previously reported catalysts, TiN (865 mAh g(-1) at 5 C). The addition of Ta2O5 into the carbon-coated separator facilitates the chemical disproportionation of reaction intermeditates, Li2S4 into Li2S8 and Li2S effectively, which leads to the greatly lengthened second plateau in discharge profile. The heterogeneous catalysis of Ta2O5 is clearly verified with the UV-Vis spectra directly showing the change of Li2S4 concentration and the battery performance tests without any active elemental sulfur.
Publisher
ELSEVIER
Issue Date
2019-09
Language
English
Article Type
Article
Citation

JOURNAL OF POWER SOURCES, v.435

ISSN
0378-7753
DOI
10.1016/j.jpowsour.2019.226707
URI
http://hdl.handle.net/10203/267503
Appears in Collection
EEW-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0