Freeze-Dried Sulfur-Graphene Oxide-Carbon Nanotube Nanocomposite for High Sulfur-Loading Lithium/Sulfur Cells

Cited 26 time in webofscience Cited 0 time in scopus
  • Hit : 119
  • Download : 0
The ambient-temperature rechargeable lithium/sulfur (Li/S) cell is a strong candidate for the beyond lithium ion cell since significant progress on developing advanced sulfur electrodes with high sulfur loading has been made. Here we report on a new sulfur electrode active material consisting of a cetyltrimethylammonium bromide-modified sulfur-graphene oxide-carbon nanotube (S-GO-CTA-CNT) nanocomposite prepared by freeze-drying. We show the real-time formation of nanocrystalline lithium sulfide (Li2S) at the interface between the S-GO-CTA-CNT nanocomposite and the liquid electrolyte by in situ TEM observation of the reaction. The combination of GO and CNT helps to maintain the structural integrity of the S-GO-CTA-CNT nanocomposite during lithiation/delithiation. A high S loading (11.1 mgS/cm(2), 75% S) S-GO-CTA-CNT electrode was successfully prepared using a three-dimensional structured A1 foam as a substrate and showed good S utilization (1128 mAh/g S corresponding to 12.5 mAh/cm(2)), even with a very low electrolyte to sulfur weight ratio of 4. Moreover, it was demonstrated that the ionic liquid in the electrolyte improves the Coulombic efficiency and stabilizes the morphology of the Li metal anode.
Publisher
AMER CHEMICAL SOC
Issue Date
2017-11
Language
English
Article Type
Article
Keywords

LI-S BATTERIES; ENERGY-DENSITY; ELECTRON-MICROSCOPY; HIGH-CAPACITY; LONG-LIFE; CATHODE; PERFORMANCE; GROWTH; FOAM; SCAFFOLDS

Citation

NANO LETTERS, v.17, no.11, pp.7086 - 7094

ISSN
1530-6984
DOI
10.1021/acs.nanolett.7b03831
URI
http://hdl.handle.net/10203/237697
Appears in Collection
MS-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡ Click to see webofscience_button
⊙ Cited 26 items in WoS Click to see citing articles in records_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0